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targets/cmsis/TARGET_STM/TARGET_NUCLEO_F030R8/stm32f0xx_usart.c@106:ced8cbb51063, 2014-02-26 (annotated)

Committer:: mbed_official
Date:: Wed Feb 26 09:45:12 2014 +0000
Revision:: 106:ced8cbb51063
Parent:: 76:aeb1df146756

Synchronized with git revision 4222735eff5868389433f0e9271976b39c8115cd



Full URL: https://github.com/mbedmicro/mbed/commit/4222735eff5868389433f0e9271976b39c8115cd/



[NUCLEO_xxx] Update STM32CubeF4 driver V1.0.0 + update license

Who changed what in which revision?

User	Revision	Line number	New contents of line
mbed_official	76:aeb1df146756	1	/**
mbed_official	76:aeb1df146756	2	******************************************************************************
mbed_official	76:aeb1df146756	3	* @file stm32f0xx_usart.c
mbed_official	76:aeb1df146756	4	* @author MCD Application Team
mbed_official	76:aeb1df146756	5	* @version V1.3.0
mbed_official	76:aeb1df146756	6	* @date 16-January-2014
mbed_official	76:aeb1df146756	7	* @brief This file provides firmware functions to manage the following
mbed_official	76:aeb1df146756	8	* functionalities of the Universal synchronous asynchronous receiver
mbed_official	76:aeb1df146756	9	* transmitter (USART):
mbed_official	76:aeb1df146756	10	* + Initialization and Configuration
mbed_official	76:aeb1df146756	11	* + STOP Mode
mbed_official	76:aeb1df146756	12	* + AutoBaudRate
mbed_official	76:aeb1df146756	13	* + Data transfers
mbed_official	76:aeb1df146756	14	* + Multi-Processor Communication
mbed_official	76:aeb1df146756	15	* + LIN mode
mbed_official	76:aeb1df146756	16	* + Half-duplex mode
mbed_official	76:aeb1df146756	17	* + Smartcard mode
mbed_official	76:aeb1df146756	18	* + IrDA mode
mbed_official	76:aeb1df146756	19	* + RS485 mode
mbed_official	76:aeb1df146756	20	* + DMA transfers management
mbed_official	76:aeb1df146756	21	* + Interrupts and flags management
mbed_official	76:aeb1df146756	22	*
mbed_official	76:aeb1df146756	23	* @verbatim
mbed_official	76:aeb1df146756	24	===============================================================================
mbed_official	76:aeb1df146756	25	##### How to use this driver #####
mbed_official	76:aeb1df146756	26	===============================================================================
mbed_official	76:aeb1df146756	27	[..]
mbed_official	76:aeb1df146756	28	(#) Enable peripheral clock using RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE)
mbed_official	76:aeb1df146756	29	function for USART1 or using RCC_APB1PeriphClockCmd(RCC_APB1Periph_USARTx, ENABLE)
mbed_official	76:aeb1df146756	30	function for USART2 and USART3.
mbed_official	76:aeb1df146756	31	(#) According to the USART mode, enable the GPIO clocks using
mbed_official	76:aeb1df146756	32	RCC_AHBPeriphClockCmd() function. (The I/O can be TX, RX, CTS,
mbed_official	76:aeb1df146756	33	or and SCLK).
mbed_official	76:aeb1df146756	34	(#) Peripheral's alternate function:
mbed_official	76:aeb1df146756	35	(++) Connect the pin to the desired peripherals' Alternate
mbed_official	76:aeb1df146756	36	Function (AF) using GPIO_PinAFConfig() function.
mbed_official	76:aeb1df146756	37	(++) Configure the desired pin in alternate function by:
mbed_official	76:aeb1df146756	38	GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF.
mbed_official	76:aeb1df146756	39	(++) Select the type, pull-up/pull-down and output speed via
mbed_official	76:aeb1df146756	40	GPIO_PuPd, GPIO_OType and GPIO_Speed members.
mbed_official	76:aeb1df146756	41	(++) Call GPIO_Init() function.
mbed_official	76:aeb1df146756	42	(#) Program the Baud Rate, Word Length , Stop Bit, Parity, Hardware
mbed_official	76:aeb1df146756	43	flow control and Mode(Receiver/Transmitter) using the SPI_Init()
mbed_official	76:aeb1df146756	44	function.
mbed_official	76:aeb1df146756	45	(#) For synchronous mode, enable the clock and program the polarity,
mbed_official	76:aeb1df146756	46	phase and last bit using the USART_ClockInit() function.
mbed_official	76:aeb1df146756	47	(#) Enable the NVIC and the corresponding interrupt using the function
mbed_official	76:aeb1df146756	48	USART_ITConfig() if you need to use interrupt mode.
mbed_official	76:aeb1df146756	49	(#) When using the DMA mode:
mbed_official	76:aeb1df146756	50	(++) Configure the DMA using DMA_Init() function.
mbed_official	76:aeb1df146756	51	(++) Active the needed channel Request using USART_DMACmd() function.
mbed_official	76:aeb1df146756	52	(#) Enable the USART using the USART_Cmd() function.
mbed_official	76:aeb1df146756	53	(#) Enable the DMA using the DMA_Cmd() function, when using DMA mode.
mbed_official	76:aeb1df146756	54	[..]
mbed_official	76:aeb1df146756	55	Refer to Multi-Processor, LIN, half-duplex, Smartcard, IrDA sub-sections
mbed_official	76:aeb1df146756	56	for more details.
mbed_official	76:aeb1df146756	57
mbed_official	76:aeb1df146756	58	@endverbatim
mbed_official	76:aeb1df146756	59
mbed_official	76:aeb1df146756	60	******************************************************************************
mbed_official	76:aeb1df146756	61	* @attention
mbed_official	76:aeb1df146756	62	*
mbed_official	106:ced8cbb51063	63	* <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official	76:aeb1df146756	64	*
mbed_official	106:ced8cbb51063	65	* Redistribution and use in source and binary forms, with or without modification,
mbed_official	106:ced8cbb51063	66	* are permitted provided that the following conditions are met:
mbed_official	106:ced8cbb51063	67	* 1. Redistributions of source code must retain the above copyright notice,
mbed_official	106:ced8cbb51063	68	* this list of conditions and the following disclaimer.
mbed_official	106:ced8cbb51063	69	* 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official	106:ced8cbb51063	70	* this list of conditions and the following disclaimer in the documentation
mbed_official	106:ced8cbb51063	71	* and/or other materials provided with the distribution.
mbed_official	106:ced8cbb51063	72	* 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official	106:ced8cbb51063	73	* may be used to endorse or promote products derived from this software
mbed_official	106:ced8cbb51063	74	* without specific prior written permission.
mbed_official	76:aeb1df146756	75	*
mbed_official	106:ced8cbb51063	76	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official	106:ced8cbb51063	77	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official	106:ced8cbb51063	78	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official	106:ced8cbb51063	79	* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official	106:ced8cbb51063	80	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official	106:ced8cbb51063	81	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official	106:ced8cbb51063	82	* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official	106:ced8cbb51063	83	* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official	106:ced8cbb51063	84	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official	106:ced8cbb51063	85	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official	76:aeb1df146756	86	*
mbed_official	76:aeb1df146756	87	******************************************************************************
mbed_official	76:aeb1df146756	88	*/
mbed_official	76:aeb1df146756	89
mbed_official	76:aeb1df146756	90	/* Includes ------------------------------------------------------------------*/
mbed_official	76:aeb1df146756	91	#include "stm32f0xx_usart.h"
mbed_official	76:aeb1df146756	92	#include "stm32f0xx_rcc.h"
mbed_official	76:aeb1df146756	93
mbed_official	76:aeb1df146756	94	/** @addtogroup STM32F0xx_StdPeriph_Driver
mbed_official	76:aeb1df146756	95	* @{
mbed_official	76:aeb1df146756	96	*/
mbed_official	76:aeb1df146756	97
mbed_official	76:aeb1df146756	98	/** @defgroup USART
mbed_official	76:aeb1df146756	99	* @brief USART driver modules
mbed_official	76:aeb1df146756	100	* @{
mbed_official	76:aeb1df146756	101	*/
mbed_official	76:aeb1df146756	102
mbed_official	76:aeb1df146756	103	/* Private typedef -----------------------------------------------------------*/
mbed_official	76:aeb1df146756	104	/* Private define ------------------------------------------------------------*/
mbed_official	76:aeb1df146756	105
mbed_official	76:aeb1df146756	106	/!< USART CR1 register clear Mask ((~(uint32_t)0xFFFFE6F3)) /
mbed_official	76:aeb1df146756	107	#define CR1_CLEAR_MASK ((uint32_t)(USART_CR1_M \| USART_CR1_PCE \| \
mbed_official	76:aeb1df146756	108	USART_CR1_PS \| USART_CR1_TE \| \
mbed_official	76:aeb1df146756	109	USART_CR1_RE))
mbed_official	76:aeb1df146756	110
mbed_official	76:aeb1df146756	111	/!< USART CR2 register clock bits clear Mask ((~(uint32_t)0xFFFFF0FF)) /
mbed_official	76:aeb1df146756	112	#define CR2_CLOCK_CLEAR_MASK ((uint32_t)(USART_CR2_CLKEN \| USART_CR2_CPOL \| \
mbed_official	76:aeb1df146756	113	USART_CR2_CPHA \| USART_CR2_LBCL))
mbed_official	76:aeb1df146756	114
mbed_official	76:aeb1df146756	115	/!< USART CR3 register clear Mask ((~(uint32_t)0xFFFFFCFF)) /
mbed_official	76:aeb1df146756	116	#define CR3_CLEAR_MASK ((uint32_t)(USART_CR3_RTSE \| USART_CR3_CTSE))
mbed_official	76:aeb1df146756	117
mbed_official	76:aeb1df146756	118	/!< USART Interrupts mask /
mbed_official	76:aeb1df146756	119	#define IT_MASK ((uint32_t)0x000000FF)
mbed_official	76:aeb1df146756	120
mbed_official	76:aeb1df146756	121	/* Private macro -------------------------------------------------------------*/
mbed_official	76:aeb1df146756	122	/* Private variables ---------------------------------------------------------*/
mbed_official	76:aeb1df146756	123	/* Private function prototypes -----------------------------------------------*/
mbed_official	76:aeb1df146756	124	/* Private functions ---------------------------------------------------------*/
mbed_official	76:aeb1df146756	125
mbed_official	76:aeb1df146756	126	/** @defgroup USART_Private_Functions
mbed_official	76:aeb1df146756	127	* @{
mbed_official	76:aeb1df146756	128	*/
mbed_official	76:aeb1df146756	129
mbed_official	76:aeb1df146756	130	/** @defgroup USART_Group1 Initialization and Configuration functions
mbed_official	76:aeb1df146756	131	* @brief Initialization and Configuration functions
mbed_official	76:aeb1df146756	132	*
mbed_official	76:aeb1df146756	133	@verbatim
mbed_official	76:aeb1df146756	134	===============================================================================
mbed_official	76:aeb1df146756	135	##### Initialization and Configuration functions #####
mbed_official	76:aeb1df146756	136	===============================================================================
mbed_official	76:aeb1df146756	137	[..]
mbed_official	76:aeb1df146756	138	This subsection provides a set of functions allowing to initialize the USART
mbed_official	76:aeb1df146756	139	in asynchronous and in synchronous modes.
mbed_official	76:aeb1df146756	140	(+) For the asynchronous mode only these parameters can be configured:
mbed_official	76:aeb1df146756	141	(++) Baud Rate.
mbed_official	76:aeb1df146756	142	(++) Word Length.
mbed_official	76:aeb1df146756	143	(++) Stop Bit.
mbed_official	76:aeb1df146756	144	(++) Parity: If the parity is enabled, then the MSB bit of the data written
mbed_official	76:aeb1df146756	145	in the data register is transmitted but is changed by the parity bit.
mbed_official	76:aeb1df146756	146	Depending on the frame length defined by the M bit (8-bits or 9-bits),
mbed_official	76:aeb1df146756	147	the possible USART frame formats are as listed in the following table:
mbed_official	76:aeb1df146756	148
mbed_official	76:aeb1df146756	149	+-------------------------------------------------------------+
mbed_official	76:aeb1df146756	150	\| M bit \| PCE bit \| USART frame \|
mbed_official	76:aeb1df146756	151	\|---------------------\|---------------------------------------\|
mbed_official	76:aeb1df146756	152	\| 0 \| 0 \| \| SB \| 8 bit data \| STB \| \|
mbed_official	76:aeb1df146756	153	\|---------\|-----------\|---------------------------------------\|
mbed_official	76:aeb1df146756	154	\| 0 \| 1 \| \| SB \| 7 bit data \| PB \| STB \| \|
mbed_official	76:aeb1df146756	155	\|---------\|-----------\|---------------------------------------\|
mbed_official	76:aeb1df146756	156	\| 1 \| 0 \| \| SB \| 9 bit data \| STB \| \|
mbed_official	76:aeb1df146756	157	\|---------\|-----------\|---------------------------------------\|
mbed_official	76:aeb1df146756	158	\| 1 \| 1 \| \| SB \| 8 bit data \| PB \| STB \| \|
mbed_official	76:aeb1df146756	159	+-------------------------------------------------------------+
mbed_official	76:aeb1df146756	160
mbed_official	76:aeb1df146756	161	(++) Hardware flow control.
mbed_official	76:aeb1df146756	162	(++) Receiver/transmitter modes.
mbed_official	76:aeb1df146756	163	[..] The USART_Init() function follows the USART asynchronous configuration
mbed_official	76:aeb1df146756	164	procedure(details for the procedure are available in reference manual.
mbed_official	76:aeb1df146756	165	(+) For the synchronous mode in addition to the asynchronous mode parameters
mbed_official	76:aeb1df146756	166	these parameters should be also configured:
mbed_official	76:aeb1df146756	167	(++) USART Clock Enabled.
mbed_official	76:aeb1df146756	168	(++) USART polarity.
mbed_official	76:aeb1df146756	169	(++) USART phase.
mbed_official	76:aeb1df146756	170	(++) USART LastBit.
mbed_official	76:aeb1df146756	171	[..] These parameters can be configured using the USART_ClockInit() function.
mbed_official	76:aeb1df146756	172
mbed_official	76:aeb1df146756	173	@endverbatim
mbed_official	76:aeb1df146756	174	* @{
mbed_official	76:aeb1df146756	175	*/
mbed_official	76:aeb1df146756	176
mbed_official	76:aeb1df146756	177	/**
mbed_official	76:aeb1df146756	178	* @brief Deinitializes the USARTx peripheral registers to their default reset values.
mbed_official	76:aeb1df146756	179	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	180	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	181	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	182	* @retval None
mbed_official	76:aeb1df146756	183	*/
mbed_official	76:aeb1df146756	184	void USART_DeInit(USART_TypeDef* USARTx)
mbed_official	76:aeb1df146756	185	{
mbed_official	76:aeb1df146756	186	/* Check the parameters */
mbed_official	76:aeb1df146756	187	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	188
mbed_official	76:aeb1df146756	189	if (USARTx == USART1)
mbed_official	76:aeb1df146756	190	{
mbed_official	76:aeb1df146756	191	RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official	76:aeb1df146756	192	RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official	76:aeb1df146756	193	}
mbed_official	76:aeb1df146756	194	else if (USARTx == USART2)
mbed_official	76:aeb1df146756	195	{
mbed_official	76:aeb1df146756	196	RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official	76:aeb1df146756	197	RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official	76:aeb1df146756	198	}
mbed_official	76:aeb1df146756	199	else if (USARTx == USART3)
mbed_official	76:aeb1df146756	200	{
mbed_official	76:aeb1df146756	201	RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official	76:aeb1df146756	202	RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official	76:aeb1df146756	203	}
mbed_official	76:aeb1df146756	204	else
mbed_official	76:aeb1df146756	205	{
mbed_official	76:aeb1df146756	206	if (USARTx == USART4)
mbed_official	76:aeb1df146756	207	{
mbed_official	76:aeb1df146756	208	RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART4, ENABLE);
mbed_official	76:aeb1df146756	209	RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART4, DISABLE);
mbed_official	76:aeb1df146756	210	}
mbed_official	76:aeb1df146756	211	}
mbed_official	76:aeb1df146756	212	}
mbed_official	76:aeb1df146756	213
mbed_official	76:aeb1df146756	214	/**
mbed_official	76:aeb1df146756	215	* @brief Initializes the USARTx peripheral according to the specified
mbed_official	76:aeb1df146756	216	* parameters in the USART_InitStruct .
mbed_official	76:aeb1df146756	217	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	218	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	219	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	220	* @param USART_InitStruct: pointer to a USART_InitTypeDef structure that contains
mbed_official	76:aeb1df146756	221	* the configuration information for the specified USART peripheral.
mbed_official	76:aeb1df146756	222	* @retval None
mbed_official	76:aeb1df146756	223	*/
mbed_official	76:aeb1df146756	224	void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct)
mbed_official	76:aeb1df146756	225	{
mbed_official	76:aeb1df146756	226	uint32_t divider = 0, apbclock = 0, tmpreg = 0;
mbed_official	76:aeb1df146756	227	RCC_ClocksTypeDef RCC_ClocksStatus;
mbed_official	76:aeb1df146756	228
mbed_official	76:aeb1df146756	229	/* Check the parameters */
mbed_official	76:aeb1df146756	230	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	231	assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate));
mbed_official	76:aeb1df146756	232	assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength));
mbed_official	76:aeb1df146756	233	assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits));
mbed_official	76:aeb1df146756	234	assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity));
mbed_official	76:aeb1df146756	235	assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode));
mbed_official	76:aeb1df146756	236	assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl));
mbed_official	76:aeb1df146756	237
mbed_official	76:aeb1df146756	238	/* Disable USART */
mbed_official	76:aeb1df146756	239	USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE);
mbed_official	76:aeb1df146756	240
mbed_official	76:aeb1df146756	241	/---------------------------- USART CR2 Configuration -----------------------/
mbed_official	76:aeb1df146756	242	tmpreg = USARTx->CR2;
mbed_official	76:aeb1df146756	243	/* Clear STOP[13:12] bits */
mbed_official	76:aeb1df146756	244	tmpreg &= (uint32_t)~((uint32_t)USART_CR2_STOP);
mbed_official	76:aeb1df146756	245
mbed_official	76:aeb1df146756	246	/* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/
mbed_official	76:aeb1df146756	247	/* Set STOP[13:12] bits according to USART_StopBits value */
mbed_official	76:aeb1df146756	248	tmpreg \|= (uint32_t)USART_InitStruct->USART_StopBits;
mbed_official	76:aeb1df146756	249
mbed_official	76:aeb1df146756	250	/* Write to USART CR2 */
mbed_official	76:aeb1df146756	251	USARTx->CR2 = tmpreg;
mbed_official	76:aeb1df146756	252
mbed_official	76:aeb1df146756	253	/---------------------------- USART CR1 Configuration -----------------------/
mbed_official	76:aeb1df146756	254	tmpreg = USARTx->CR1;
mbed_official	76:aeb1df146756	255	/* Clear M, PCE, PS, TE and RE bits */
mbed_official	76:aeb1df146756	256	tmpreg &= (uint32_t)~((uint32_t)CR1_CLEAR_MASK);
mbed_official	76:aeb1df146756	257
mbed_official	76:aeb1df146756	258	/* Configure the USART Word Length, Parity and mode ----------------------- */
mbed_official	76:aeb1df146756	259	/* Set the M bits according to USART_WordLength value */
mbed_official	76:aeb1df146756	260	/* Set PCE and PS bits according to USART_Parity value */
mbed_official	76:aeb1df146756	261	/* Set TE and RE bits according to USART_Mode value */
mbed_official	76:aeb1df146756	262	tmpreg \|= (uint32_t)USART_InitStruct->USART_WordLength \| USART_InitStruct->USART_Parity \|
mbed_official	76:aeb1df146756	263	USART_InitStruct->USART_Mode;
mbed_official	76:aeb1df146756	264
mbed_official	76:aeb1df146756	265	/* Write to USART CR1 */
mbed_official	76:aeb1df146756	266	USARTx->CR1 = tmpreg;
mbed_official	76:aeb1df146756	267
mbed_official	76:aeb1df146756	268	/---------------------------- USART CR3 Configuration -----------------------/
mbed_official	76:aeb1df146756	269	tmpreg = USARTx->CR3;
mbed_official	76:aeb1df146756	270	/* Clear CTSE and RTSE bits */
mbed_official	76:aeb1df146756	271	tmpreg &= (uint32_t)~((uint32_t)CR3_CLEAR_MASK);
mbed_official	76:aeb1df146756	272
mbed_official	76:aeb1df146756	273	/* Configure the USART HFC -------------------------------------------------*/
mbed_official	76:aeb1df146756	274	/* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */
mbed_official	76:aeb1df146756	275	tmpreg \|= USART_InitStruct->USART_HardwareFlowControl;
mbed_official	76:aeb1df146756	276
mbed_official	76:aeb1df146756	277	/* Write to USART CR3 */
mbed_official	76:aeb1df146756	278	USARTx->CR3 = tmpreg;
mbed_official	76:aeb1df146756	279
mbed_official	76:aeb1df146756	280	/---------------------------- USART BRR Configuration -----------------------/
mbed_official	76:aeb1df146756	281	/* Configure the USART Baud Rate -------------------------------------------*/
mbed_official	76:aeb1df146756	282	RCC_GetClocksFreq(&RCC_ClocksStatus);
mbed_official	76:aeb1df146756	283
mbed_official	76:aeb1df146756	284	if (USARTx == USART1)
mbed_official	76:aeb1df146756	285	{
mbed_official	76:aeb1df146756	286	apbclock = RCC_ClocksStatus.USART1CLK_Frequency;
mbed_official	76:aeb1df146756	287	}
mbed_official	76:aeb1df146756	288	else if (USARTx == USART2)
mbed_official	76:aeb1df146756	289	{
mbed_official	76:aeb1df146756	290	apbclock = RCC_ClocksStatus.USART2CLK_Frequency;
mbed_official	76:aeb1df146756	291	}
mbed_official	76:aeb1df146756	292	else
mbed_official	76:aeb1df146756	293	{
mbed_official	76:aeb1df146756	294	apbclock = RCC_ClocksStatus.PCLK_Frequency;
mbed_official	76:aeb1df146756	295	}
mbed_official	76:aeb1df146756	296
mbed_official	76:aeb1df146756	297	/* Determine the integer part */
mbed_official	76:aeb1df146756	298	if ((USARTx->CR1 & USART_CR1_OVER8) != 0)
mbed_official	76:aeb1df146756	299	{
mbed_official	76:aeb1df146756	300	/* (divider * 10) computing in case Oversampling mode is 8 Samples */
mbed_official	76:aeb1df146756	301	divider = (uint32_t)((2 * apbclock) / (USART_InitStruct->USART_BaudRate));
mbed_official	76:aeb1df146756	302	tmpreg = (uint32_t)((2 * apbclock) % (USART_InitStruct->USART_BaudRate));
mbed_official	76:aeb1df146756	303	}
mbed_official	76:aeb1df146756	304	else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */
mbed_official	76:aeb1df146756	305	{
mbed_official	76:aeb1df146756	306	/* (divider * 10) computing in case Oversampling mode is 16 Samples */
mbed_official	76:aeb1df146756	307	divider = (uint32_t)((apbclock) / (USART_InitStruct->USART_BaudRate));
mbed_official	76:aeb1df146756	308	tmpreg = (uint32_t)((apbclock) % (USART_InitStruct->USART_BaudRate));
mbed_official	76:aeb1df146756	309	}
mbed_official	76:aeb1df146756	310
mbed_official	76:aeb1df146756	311	/* round the divider : if fractional part i greater than 0.5 increment divider */
mbed_official	76:aeb1df146756	312	if (tmpreg >= (USART_InitStruct->USART_BaudRate) / 2)
mbed_official	76:aeb1df146756	313	{
mbed_official	76:aeb1df146756	314	divider++;
mbed_official	76:aeb1df146756	315	}
mbed_official	76:aeb1df146756	316
mbed_official	76:aeb1df146756	317	/* Implement the divider in case Oversampling mode is 8 Samples */
mbed_official	76:aeb1df146756	318	if ((USARTx->CR1 & USART_CR1_OVER8) != 0)
mbed_official	76:aeb1df146756	319	{
mbed_official	76:aeb1df146756	320	/* get the LSB of divider and shift it to the right by 1 bit */
mbed_official	76:aeb1df146756	321	tmpreg = (divider & (uint16_t)0x000F) >> 1;
mbed_official	76:aeb1df146756	322
mbed_official	76:aeb1df146756	323	/* update the divider value */
mbed_official	76:aeb1df146756	324	divider = (divider & (uint16_t)0xFFF0) \| tmpreg;
mbed_official	76:aeb1df146756	325	}
mbed_official	76:aeb1df146756	326
mbed_official	76:aeb1df146756	327	/* Write to USART BRR */
mbed_official	76:aeb1df146756	328	USARTx->BRR = (uint16_t)divider;
mbed_official	76:aeb1df146756	329	}
mbed_official	76:aeb1df146756	330
mbed_official	76:aeb1df146756	331	/**
mbed_official	76:aeb1df146756	332	* @brief Fills each USART_InitStruct member with its default value.
mbed_official	76:aeb1df146756	333	* @param USART_InitStruct: pointer to a USART_InitTypeDef structure
mbed_official	76:aeb1df146756	334	* which will be initialized.
mbed_official	76:aeb1df146756	335	* @retval None
mbed_official	76:aeb1df146756	336	*/
mbed_official	76:aeb1df146756	337	void USART_StructInit(USART_InitTypeDef* USART_InitStruct)
mbed_official	76:aeb1df146756	338	{
mbed_official	76:aeb1df146756	339	/* USART_InitStruct members default value */
mbed_official	76:aeb1df146756	340	USART_InitStruct->USART_BaudRate = 9600;
mbed_official	76:aeb1df146756	341	USART_InitStruct->USART_WordLength = USART_WordLength_8b;
mbed_official	76:aeb1df146756	342	USART_InitStruct->USART_StopBits = USART_StopBits_1;
mbed_official	76:aeb1df146756	343	USART_InitStruct->USART_Parity = USART_Parity_No ;
mbed_official	76:aeb1df146756	344	USART_InitStruct->USART_Mode = USART_Mode_Rx \| USART_Mode_Tx;
mbed_official	76:aeb1df146756	345	USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None;
mbed_official	76:aeb1df146756	346	}
mbed_official	76:aeb1df146756	347
mbed_official	76:aeb1df146756	348	/**
mbed_official	76:aeb1df146756	349	* @brief Initializes the USARTx peripheral Clock according to the
mbed_official	76:aeb1df146756	350	* specified parameters in the USART_ClockInitStruct.
mbed_official	76:aeb1df146756	351	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	352	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	353	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	354	* @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
mbed_official	76:aeb1df146756	355	* structure that contains the configuration information for the specified
mbed_official	76:aeb1df146756	356	* USART peripheral.
mbed_official	76:aeb1df146756	357	* @retval None
mbed_official	76:aeb1df146756	358	*/
mbed_official	76:aeb1df146756	359	void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct)
mbed_official	76:aeb1df146756	360	{
mbed_official	76:aeb1df146756	361	uint32_t tmpreg = 0;
mbed_official	76:aeb1df146756	362	/* Check the parameters */
mbed_official	76:aeb1df146756	363	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	364	assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock));
mbed_official	76:aeb1df146756	365	assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL));
mbed_official	76:aeb1df146756	366	assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA));
mbed_official	76:aeb1df146756	367	assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit));
mbed_official	76:aeb1df146756	368	/---------------------------- USART CR2 Configuration -----------------------/
mbed_official	76:aeb1df146756	369	tmpreg = USARTx->CR2;
mbed_official	76:aeb1df146756	370	/* Clear CLKEN, CPOL, CPHA, LBCL and SSM bits */
mbed_official	76:aeb1df146756	371	tmpreg &= (uint32_t)~((uint32_t)CR2_CLOCK_CLEAR_MASK);
mbed_official	76:aeb1df146756	372	/* Configure the USART Clock, CPOL, CPHA, LastBit and SSM ------------*/
mbed_official	76:aeb1df146756	373	/* Set CLKEN bit according to USART_Clock value */
mbed_official	76:aeb1df146756	374	/* Set CPOL bit according to USART_CPOL value */
mbed_official	76:aeb1df146756	375	/* Set CPHA bit according to USART_CPHA value */
mbed_official	76:aeb1df146756	376	/* Set LBCL bit according to USART_LastBit value */
mbed_official	76:aeb1df146756	377	tmpreg \|= (uint32_t)(USART_ClockInitStruct->USART_Clock \| USART_ClockInitStruct->USART_CPOL \|
mbed_official	76:aeb1df146756	378	USART_ClockInitStruct->USART_CPHA \| USART_ClockInitStruct->USART_LastBit);
mbed_official	76:aeb1df146756	379	/* Write to USART CR2 */
mbed_official	76:aeb1df146756	380	USARTx->CR2 = tmpreg;
mbed_official	76:aeb1df146756	381	}
mbed_official	76:aeb1df146756	382
mbed_official	76:aeb1df146756	383	/**
mbed_official	76:aeb1df146756	384	* @brief Fills each USART_ClockInitStruct member with its default value.
mbed_official	76:aeb1df146756	385	* @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
mbed_official	76:aeb1df146756	386	* structure which will be initialized.
mbed_official	76:aeb1df146756	387	* @retval None
mbed_official	76:aeb1df146756	388	*/
mbed_official	76:aeb1df146756	389	void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct)
mbed_official	76:aeb1df146756	390	{
mbed_official	76:aeb1df146756	391	/* USART_ClockInitStruct members default value */
mbed_official	76:aeb1df146756	392	USART_ClockInitStruct->USART_Clock = USART_Clock_Disable;
mbed_official	76:aeb1df146756	393	USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low;
mbed_official	76:aeb1df146756	394	USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge;
mbed_official	76:aeb1df146756	395	USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable;
mbed_official	76:aeb1df146756	396	}
mbed_official	76:aeb1df146756	397
mbed_official	76:aeb1df146756	398	/**
mbed_official	76:aeb1df146756	399	* @brief Enables or disables the specified USART peripheral.
mbed_official	76:aeb1df146756	400	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	401	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	402	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	403	* @param NewState: new state of the USARTx peripheral.
mbed_official	76:aeb1df146756	404	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	405	* @retval None
mbed_official	76:aeb1df146756	406	*/
mbed_official	76:aeb1df146756	407	void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	408	{
mbed_official	76:aeb1df146756	409	/* Check the parameters */
mbed_official	76:aeb1df146756	410	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	411	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	412
mbed_official	76:aeb1df146756	413	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	414	{
mbed_official	76:aeb1df146756	415	/* Enable the selected USART by setting the UE bit in the CR1 register */
mbed_official	76:aeb1df146756	416	USARTx->CR1 \|= USART_CR1_UE;
mbed_official	76:aeb1df146756	417	}
mbed_official	76:aeb1df146756	418	else
mbed_official	76:aeb1df146756	419	{
mbed_official	76:aeb1df146756	420	/* Disable the selected USART by clearing the UE bit in the CR1 register */
mbed_official	76:aeb1df146756	421	USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UE);
mbed_official	76:aeb1df146756	422	}
mbed_official	76:aeb1df146756	423	}
mbed_official	76:aeb1df146756	424
mbed_official	76:aeb1df146756	425	/**
mbed_official	76:aeb1df146756	426	* @brief Enables or disables the USART's transmitter or receiver.
mbed_official	76:aeb1df146756	427	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	428	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	429	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	430	* @param USART_Direction: specifies the USART direction.
mbed_official	76:aeb1df146756	431	* This parameter can be any combination of the following values:
mbed_official	76:aeb1df146756	432	* @arg USART_Mode_Tx: USART Transmitter
mbed_official	76:aeb1df146756	433	* @arg USART_Mode_Rx: USART Receiver
mbed_official	76:aeb1df146756	434	* @param NewState: new state of the USART transfer direction.
mbed_official	76:aeb1df146756	435	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	436	* @retval None
mbed_official	76:aeb1df146756	437	*/
mbed_official	76:aeb1df146756	438	void USART_DirectionModeCmd(USART_TypeDef* USARTx, uint32_t USART_DirectionMode, FunctionalState NewState)
mbed_official	76:aeb1df146756	439	{
mbed_official	76:aeb1df146756	440	/* Check the parameters */
mbed_official	76:aeb1df146756	441	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	442	assert_param(IS_USART_MODE(USART_DirectionMode));
mbed_official	76:aeb1df146756	443	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	444
mbed_official	76:aeb1df146756	445	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	446	{
mbed_official	76:aeb1df146756	447	/* Enable the USART's transfer interface by setting the TE and/or RE bits
mbed_official	76:aeb1df146756	448	in the USART CR1 register */
mbed_official	76:aeb1df146756	449	USARTx->CR1 \|= USART_DirectionMode;
mbed_official	76:aeb1df146756	450	}
mbed_official	76:aeb1df146756	451	else
mbed_official	76:aeb1df146756	452	{
mbed_official	76:aeb1df146756	453	/* Disable the USART's transfer interface by clearing the TE and/or RE bits
mbed_official	76:aeb1df146756	454	in the USART CR3 register */
mbed_official	76:aeb1df146756	455	USARTx->CR1 &= (uint32_t)~USART_DirectionMode;
mbed_official	76:aeb1df146756	456	}
mbed_official	76:aeb1df146756	457	}
mbed_official	76:aeb1df146756	458
mbed_official	76:aeb1df146756	459	/**
mbed_official	76:aeb1df146756	460	* @brief Enables or disables the USART's 8x oversampling mode.
mbed_official	76:aeb1df146756	461	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	462	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	463	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	464	* @param NewState: new state of the USART 8x oversampling mode.
mbed_official	76:aeb1df146756	465	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	466	* @note This function has to be called before calling USART_Init() function
mbed_official	76:aeb1df146756	467	* in order to have correct baudrate Divider value.
mbed_official	76:aeb1df146756	468	* @retval None
mbed_official	76:aeb1df146756	469	*/
mbed_official	76:aeb1df146756	470	void USART_OverSampling8Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	471	{
mbed_official	76:aeb1df146756	472	/* Check the parameters */
mbed_official	76:aeb1df146756	473	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	474	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	475
mbed_official	76:aeb1df146756	476	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	477	{
mbed_official	76:aeb1df146756	478	/* Enable the 8x Oversampling mode by setting the OVER8 bit in the CR1 register */
mbed_official	76:aeb1df146756	479	USARTx->CR1 \|= USART_CR1_OVER8;
mbed_official	76:aeb1df146756	480	}
mbed_official	76:aeb1df146756	481	else
mbed_official	76:aeb1df146756	482	{
mbed_official	76:aeb1df146756	483	/* Disable the 8x Oversampling mode by clearing the OVER8 bit in the CR1 register */
mbed_official	76:aeb1df146756	484	USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_OVER8);
mbed_official	76:aeb1df146756	485	}
mbed_official	76:aeb1df146756	486	}
mbed_official	76:aeb1df146756	487
mbed_official	76:aeb1df146756	488	/**
mbed_official	76:aeb1df146756	489	* @brief Enables or disables the USART's one bit sampling method.
mbed_official	76:aeb1df146756	490	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	491	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	492	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	493	* @param NewState: new state of the USART one bit sampling method.
mbed_official	76:aeb1df146756	494	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	495	* @note This function has to be called before calling USART_Cmd() function.
mbed_official	76:aeb1df146756	496	* @retval None
mbed_official	76:aeb1df146756	497	*/
mbed_official	76:aeb1df146756	498	void USART_OneBitMethodCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	499	{
mbed_official	76:aeb1df146756	500	/* Check the parameters */
mbed_official	76:aeb1df146756	501	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	502	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	503
mbed_official	76:aeb1df146756	504	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	505	{
mbed_official	76:aeb1df146756	506	/* Enable the one bit method by setting the ONEBITE bit in the CR3 register */
mbed_official	76:aeb1df146756	507	USARTx->CR3 \|= USART_CR3_ONEBIT;
mbed_official	76:aeb1df146756	508	}
mbed_official	76:aeb1df146756	509	else
mbed_official	76:aeb1df146756	510	{
mbed_official	76:aeb1df146756	511	/* Disable the one bit method by clearing the ONEBITE bit in the CR3 register */
mbed_official	76:aeb1df146756	512	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_ONEBIT);
mbed_official	76:aeb1df146756	513	}
mbed_official	76:aeb1df146756	514	}
mbed_official	76:aeb1df146756	515
mbed_official	76:aeb1df146756	516	/**
mbed_official	76:aeb1df146756	517	* @brief Enables or disables the USART's most significant bit first
mbed_official	76:aeb1df146756	518	* transmitted/received following the start bit.
mbed_official	76:aeb1df146756	519	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	520	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	521	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	522	* @param NewState: new state of the USART most significant bit first
mbed_official	76:aeb1df146756	523	* transmitted/received following the start bit.
mbed_official	76:aeb1df146756	524	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	525	* @note This function has to be called before calling USART_Cmd() function.
mbed_official	76:aeb1df146756	526	* @retval None
mbed_official	76:aeb1df146756	527	*/
mbed_official	76:aeb1df146756	528	void USART_MSBFirstCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	529	{
mbed_official	76:aeb1df146756	530	/* Check the parameters */
mbed_official	76:aeb1df146756	531	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	532	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	533
mbed_official	76:aeb1df146756	534	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	535	{
mbed_official	76:aeb1df146756	536	/* Enable the most significant bit first transmitted/received following the
mbed_official	76:aeb1df146756	537	start bit by setting the MSBFIRST bit in the CR2 register */
mbed_official	76:aeb1df146756	538	USARTx->CR2 \|= USART_CR2_MSBFIRST;
mbed_official	76:aeb1df146756	539	}
mbed_official	76:aeb1df146756	540	else
mbed_official	76:aeb1df146756	541	{
mbed_official	76:aeb1df146756	542	/* Disable the most significant bit first transmitted/received following the
mbed_official	76:aeb1df146756	543	start bit by clearing the MSBFIRST bit in the CR2 register */
mbed_official	76:aeb1df146756	544	USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_MSBFIRST);
mbed_official	76:aeb1df146756	545	}
mbed_official	76:aeb1df146756	546	}
mbed_official	76:aeb1df146756	547
mbed_official	76:aeb1df146756	548	/**
mbed_official	76:aeb1df146756	549	* @brief Enables or disables the binary data inversion.
mbed_official	76:aeb1df146756	550	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	551	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	552	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	553	* @param NewState: new defined levels for the USART data.
mbed_official	76:aeb1df146756	554	* This parameter can be:
mbed_official	76:aeb1df146756	555	* @arg ENABLE: Logical data from the data register are send/received in negative
mbed_official	76:aeb1df146756	556	* logic (1=L, 0=H). The parity bit is also inverted.
mbed_official	76:aeb1df146756	557	* @arg DISABLE: Logical data from the data register are send/received in positive
mbed_official	76:aeb1df146756	558	* logic (1=H, 0=L)
mbed_official	76:aeb1df146756	559	* @note This function has to be called before calling USART_Cmd() function.
mbed_official	76:aeb1df146756	560	* @retval None
mbed_official	76:aeb1df146756	561	*/
mbed_official	76:aeb1df146756	562	void USART_DataInvCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	563	{
mbed_official	76:aeb1df146756	564	/* Check the parameters */
mbed_official	76:aeb1df146756	565	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	566	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	567
mbed_official	76:aeb1df146756	568	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	569	{
mbed_official	76:aeb1df146756	570	/* Enable the binary data inversion feature by setting the DATAINV bit in
mbed_official	76:aeb1df146756	571	the CR2 register */
mbed_official	76:aeb1df146756	572	USARTx->CR2 \|= USART_CR2_DATAINV;
mbed_official	76:aeb1df146756	573	}
mbed_official	76:aeb1df146756	574	else
mbed_official	76:aeb1df146756	575	{
mbed_official	76:aeb1df146756	576	/* Disable the binary data inversion feature by clearing the DATAINV bit in
mbed_official	76:aeb1df146756	577	the CR2 register */
mbed_official	76:aeb1df146756	578	USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_DATAINV);
mbed_official	76:aeb1df146756	579	}
mbed_official	76:aeb1df146756	580	}
mbed_official	76:aeb1df146756	581
mbed_official	76:aeb1df146756	582	/**
mbed_official	76:aeb1df146756	583	* @brief Enables or disables the Pin(s) active level inversion.
mbed_official	76:aeb1df146756	584	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	585	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	586	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	587	* @param USART_InvPin: specifies the USART pin(s) to invert.
mbed_official	76:aeb1df146756	588	* This parameter can be any combination of the following values:
mbed_official	76:aeb1df146756	589	* @arg USART_InvPin_Tx: USART Tx pin active level inversion.
mbed_official	76:aeb1df146756	590	* @arg USART_InvPin_Rx: USART Rx pin active level inversion.
mbed_official	76:aeb1df146756	591	* @param NewState: new active level status for the USART pin(s).
mbed_official	76:aeb1df146756	592	* This parameter can be:
mbed_official	76:aeb1df146756	593	* @arg ENABLE: pin(s) signal values are inverted (Vdd =0, Gnd =1).
mbed_official	76:aeb1df146756	594	* @arg DISABLE: pin(s) signal works using the standard logic levels (Vdd =1, Gnd =0).
mbed_official	76:aeb1df146756	595	* @note This function has to be called before calling USART_Cmd() function.
mbed_official	76:aeb1df146756	596	* @retval None
mbed_official	76:aeb1df146756	597	*/
mbed_official	76:aeb1df146756	598	void USART_InvPinCmd(USART_TypeDef* USARTx, uint32_t USART_InvPin, FunctionalState NewState)
mbed_official	76:aeb1df146756	599	{
mbed_official	76:aeb1df146756	600	/* Check the parameters */
mbed_official	76:aeb1df146756	601	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	602	assert_param(IS_USART_INVERSTION_PIN(USART_InvPin));
mbed_official	76:aeb1df146756	603	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	604
mbed_official	76:aeb1df146756	605	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	606	{
mbed_official	76:aeb1df146756	607	/* Enable the active level inversion for selected pins by setting the TXINV
mbed_official	76:aeb1df146756	608	and/or RXINV bits in the USART CR2 register */
mbed_official	76:aeb1df146756	609	USARTx->CR2 \|= USART_InvPin;
mbed_official	76:aeb1df146756	610	}
mbed_official	76:aeb1df146756	611	else
mbed_official	76:aeb1df146756	612	{
mbed_official	76:aeb1df146756	613	/* Disable the active level inversion for selected requests by clearing the
mbed_official	76:aeb1df146756	614	TXINV and/or RXINV bits in the USART CR2 register */
mbed_official	76:aeb1df146756	615	USARTx->CR2 &= (uint32_t)~USART_InvPin;
mbed_official	76:aeb1df146756	616	}
mbed_official	76:aeb1df146756	617	}
mbed_official	76:aeb1df146756	618
mbed_official	76:aeb1df146756	619	/**
mbed_official	76:aeb1df146756	620	* @brief Enables or disables the swap Tx/Rx pins.
mbed_official	76:aeb1df146756	621	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	622	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	623	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	624	* @param NewState: new state of the USARTx TX/RX pins pinout.
mbed_official	76:aeb1df146756	625	* This parameter can be:
mbed_official	76:aeb1df146756	626	* @arg ENABLE: The TX and RX pins functions are swapped.
mbed_official	76:aeb1df146756	627	* @arg DISABLE: TX/RX pins are used as defined in standard pinout
mbed_official	76:aeb1df146756	628	* @note This function has to be called before calling USART_Cmd() function.
mbed_official	76:aeb1df146756	629	* @retval None
mbed_official	76:aeb1df146756	630	*/
mbed_official	76:aeb1df146756	631	void USART_SWAPPinCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	632	{
mbed_official	76:aeb1df146756	633	/* Check the parameters */
mbed_official	76:aeb1df146756	634	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	635	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	636
mbed_official	76:aeb1df146756	637	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	638	{
mbed_official	76:aeb1df146756	639	/* Enable the SWAP feature by setting the SWAP bit in the CR2 register */
mbed_official	76:aeb1df146756	640	USARTx->CR2 \|= USART_CR2_SWAP;
mbed_official	76:aeb1df146756	641	}
mbed_official	76:aeb1df146756	642	else
mbed_official	76:aeb1df146756	643	{
mbed_official	76:aeb1df146756	644	/* Disable the SWAP feature by clearing the SWAP bit in the CR2 register */
mbed_official	76:aeb1df146756	645	USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_SWAP);
mbed_official	76:aeb1df146756	646	}
mbed_official	76:aeb1df146756	647	}
mbed_official	76:aeb1df146756	648
mbed_official	76:aeb1df146756	649	/**
mbed_official	76:aeb1df146756	650	* @brief Enables or disables the receiver Time Out feature.
mbed_official	76:aeb1df146756	651	* @param USARTx: where x can be 1 to select the USART peripheral.
mbed_official	76:aeb1df146756	652	* @param NewState: new state of the USARTx receiver Time Out.
mbed_official	76:aeb1df146756	653	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	654	* @retval None
mbed_official	76:aeb1df146756	655	*/
mbed_official	76:aeb1df146756	656	void USART_ReceiverTimeOutCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	657	{
mbed_official	76:aeb1df146756	658	/* Check the parameters */
mbed_official	76:aeb1df146756	659	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	660	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	661
mbed_official	76:aeb1df146756	662	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	663	{
mbed_official	76:aeb1df146756	664	/* Enable the receiver time out feature by setting the RTOEN bit in the CR2
mbed_official	76:aeb1df146756	665	register */
mbed_official	76:aeb1df146756	666	USARTx->CR2 \|= USART_CR2_RTOEN;
mbed_official	76:aeb1df146756	667	}
mbed_official	76:aeb1df146756	668	else
mbed_official	76:aeb1df146756	669	{
mbed_official	76:aeb1df146756	670	/* Disable the receiver time out feature by clearing the RTOEN bit in the CR2
mbed_official	76:aeb1df146756	671	register */
mbed_official	76:aeb1df146756	672	USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_RTOEN);
mbed_official	76:aeb1df146756	673	}
mbed_official	76:aeb1df146756	674	}
mbed_official	76:aeb1df146756	675
mbed_official	76:aeb1df146756	676	/**
mbed_official	76:aeb1df146756	677	* @brief Sets the receiver Time Out value.
mbed_official	76:aeb1df146756	678	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	679	* @note USART2 is available only for STM32F072 devices.
mbed_official	76:aeb1df146756	680	* @param USART_ReceiverTimeOut: specifies the Receiver Time Out value.
mbed_official	76:aeb1df146756	681	* @retval None
mbed_official	76:aeb1df146756	682	*/
mbed_official	76:aeb1df146756	683	void USART_SetReceiverTimeOut(USART_TypeDef* USARTx, uint32_t USART_ReceiverTimeOut)
mbed_official	76:aeb1df146756	684	{
mbed_official	76:aeb1df146756	685	/* Check the parameters */
mbed_official	76:aeb1df146756	686	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	687	assert_param(IS_USART_TIMEOUT(USART_ReceiverTimeOut));
mbed_official	76:aeb1df146756	688
mbed_official	76:aeb1df146756	689	/* Clear the receiver Time Out value by clearing the RTO[23:0] bits in the RTOR
mbed_official	76:aeb1df146756	690	register */
mbed_official	76:aeb1df146756	691	USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_RTO);
mbed_official	76:aeb1df146756	692	/* Set the receiver Time Out value by setting the RTO[23:0] bits in the RTOR
mbed_official	76:aeb1df146756	693	register */
mbed_official	76:aeb1df146756	694	USARTx->RTOR \|= USART_ReceiverTimeOut;
mbed_official	76:aeb1df146756	695	}
mbed_official	76:aeb1df146756	696
mbed_official	76:aeb1df146756	697	/**
mbed_official	76:aeb1df146756	698	* @brief Sets the system clock prescaler.
mbed_official	76:aeb1df146756	699	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	700	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	701	* @note USART2 is available only for STM32F072 devices.
mbed_official	76:aeb1df146756	702	* @param USART_Prescaler: specifies the prescaler clock.
mbed_official	76:aeb1df146756	703	* @note This function has to be called before calling USART_Cmd() function.
mbed_official	76:aeb1df146756	704	* @retval None
mbed_official	76:aeb1df146756	705	*/
mbed_official	76:aeb1df146756	706	void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler)
mbed_official	76:aeb1df146756	707	{
mbed_official	76:aeb1df146756	708	/* Check the parameters */
mbed_official	76:aeb1df146756	709	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	710
mbed_official	76:aeb1df146756	711	/* Clear the USART prescaler */
mbed_official	76:aeb1df146756	712	USARTx->GTPR &= USART_GTPR_GT;
mbed_official	76:aeb1df146756	713	/* Set the USART prescaler */
mbed_official	76:aeb1df146756	714	USARTx->GTPR \|= USART_Prescaler;
mbed_official	76:aeb1df146756	715	}
mbed_official	76:aeb1df146756	716
mbed_official	76:aeb1df146756	717	/**
mbed_official	76:aeb1df146756	718	* @}
mbed_official	76:aeb1df146756	719	*/
mbed_official	76:aeb1df146756	720
mbed_official	76:aeb1df146756	721
mbed_official	76:aeb1df146756	722	/** @defgroup USART_Group2 STOP Mode functions
mbed_official	76:aeb1df146756	723	* @brief STOP Mode functions
mbed_official	76:aeb1df146756	724	*
mbed_official	76:aeb1df146756	725	@verbatim
mbed_official	76:aeb1df146756	726	===============================================================================
mbed_official	76:aeb1df146756	727	##### STOP Mode functions #####
mbed_official	76:aeb1df146756	728	===============================================================================
mbed_official	76:aeb1df146756	729	[..] This subsection provides a set of functions allowing to manage
mbed_official	76:aeb1df146756	730	WakeUp from STOP mode.
mbed_official	76:aeb1df146756	731
mbed_official	76:aeb1df146756	732	[..] The USART is able to WakeUp from Stop Mode if USART clock is set to HSI
mbed_official	76:aeb1df146756	733	or LSI.
mbed_official	76:aeb1df146756	734
mbed_official	76:aeb1df146756	735	[..] The WakeUp source is configured by calling USART_StopModeWakeUpSourceConfig()
mbed_official	76:aeb1df146756	736	function.
mbed_official	76:aeb1df146756	737
mbed_official	76:aeb1df146756	738	[..] After configuring the source of WakeUp and before entering in Stop Mode
mbed_official	76:aeb1df146756	739	USART_STOPModeCmd() function should be called to allow USART WakeUp.
mbed_official	76:aeb1df146756	740
mbed_official	76:aeb1df146756	741	@endverbatim
mbed_official	76:aeb1df146756	742	* @{
mbed_official	76:aeb1df146756	743	*/
mbed_official	76:aeb1df146756	744
mbed_official	76:aeb1df146756	745	/**
mbed_official	76:aeb1df146756	746	* @brief Enables or disables the specified USART peripheral in STOP Mode.
mbed_official	76:aeb1df146756	747	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	748	* @note USART2 is available only for STM32F072 devices.
mbed_official	76:aeb1df146756	749	* @param NewState: new state of the USARTx peripheral state in stop mode.
mbed_official	76:aeb1df146756	750	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	751	* @note This function has to be called when USART clock is set to HSI or LSE.
mbed_official	76:aeb1df146756	752	* @retval None
mbed_official	76:aeb1df146756	753	*/
mbed_official	76:aeb1df146756	754	void USART_STOPModeCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	755	{
mbed_official	76:aeb1df146756	756	/* Check the parameters */
mbed_official	76:aeb1df146756	757	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	758	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	759
mbed_official	76:aeb1df146756	760	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	761	{
mbed_official	76:aeb1df146756	762	/* Enable the selected USART in STOP mode by setting the UESM bit in the CR1
mbed_official	76:aeb1df146756	763	register */
mbed_official	76:aeb1df146756	764	USARTx->CR1 \|= USART_CR1_UESM;
mbed_official	76:aeb1df146756	765	}
mbed_official	76:aeb1df146756	766	else
mbed_official	76:aeb1df146756	767	{
mbed_official	76:aeb1df146756	768	/* Disable the selected USART in STOP mode by clearing the UE bit in the CR1
mbed_official	76:aeb1df146756	769	register */
mbed_official	76:aeb1df146756	770	USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_UESM);
mbed_official	76:aeb1df146756	771	}
mbed_official	76:aeb1df146756	772	}
mbed_official	76:aeb1df146756	773
mbed_official	76:aeb1df146756	774	/**
mbed_official	76:aeb1df146756	775	* @brief Selects the USART WakeUp method form stop mode.
mbed_official	76:aeb1df146756	776	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	777	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	778	* @note USART2 is available only for STM32F072 devices.
mbed_official	76:aeb1df146756	779	* @param USART_WakeUp: specifies the selected USART wakeup method.
mbed_official	76:aeb1df146756	780	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	781	* @arg USART_WakeUpSource_AddressMatch: WUF active on address match.
mbed_official	76:aeb1df146756	782	* @arg USART_WakeUpSource_StartBit: WUF active on Start bit detection.
mbed_official	76:aeb1df146756	783	* @arg USART_WakeUpSource_RXNE: WUF active on RXNE.
mbed_official	76:aeb1df146756	784	* @note This function has to be called before calling USART_Cmd() function.
mbed_official	76:aeb1df146756	785	* @retval None
mbed_official	76:aeb1df146756	786	*/
mbed_official	76:aeb1df146756	787	void USART_StopModeWakeUpSourceConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUpSource)
mbed_official	76:aeb1df146756	788	{
mbed_official	76:aeb1df146756	789	/* Check the parameters */
mbed_official	76:aeb1df146756	790	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	791	assert_param(IS_USART_STOPMODE_WAKEUPSOURCE(USART_WakeUpSource));
mbed_official	76:aeb1df146756	792
mbed_official	76:aeb1df146756	793	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_WUS);
mbed_official	76:aeb1df146756	794	USARTx->CR3 \|= USART_WakeUpSource;
mbed_official	76:aeb1df146756	795	}
mbed_official	76:aeb1df146756	796
mbed_official	76:aeb1df146756	797	/**
mbed_official	76:aeb1df146756	798	* @}
mbed_official	76:aeb1df146756	799	*/
mbed_official	76:aeb1df146756	800
mbed_official	76:aeb1df146756	801
mbed_official	76:aeb1df146756	802	/** @defgroup USART_Group3 AutoBaudRate functions
mbed_official	76:aeb1df146756	803	* @brief AutoBaudRate functions
mbed_official	76:aeb1df146756	804	*
mbed_official	76:aeb1df146756	805	@verbatim
mbed_official	76:aeb1df146756	806	===============================================================================
mbed_official	76:aeb1df146756	807	##### AutoBaudRate functions #####
mbed_official	76:aeb1df146756	808	===============================================================================
mbed_official	76:aeb1df146756	809	[..] This subsection provides a set of functions allowing to manage
mbed_official	76:aeb1df146756	810	the AutoBaudRate detections.
mbed_official	76:aeb1df146756	811
mbed_official	76:aeb1df146756	812	[..] Before Enabling AutoBaudRate detection using USART_AutoBaudRateCmd ()
mbed_official	76:aeb1df146756	813	The character patterns used to calculate baudrate must be chosen by calling
mbed_official	76:aeb1df146756	814	USART_AutoBaudRateConfig() function. These function take as parameter :
mbed_official	76:aeb1df146756	815	(#)USART_AutoBaudRate_StartBit : any character starting with a bit 1.
mbed_official	76:aeb1df146756	816	(#)USART_AutoBaudRate_FallingEdge : any character starting with a 10xx bit pattern.
mbed_official	76:aeb1df146756	817
mbed_official	76:aeb1df146756	818	[..] At any later time, another request for AutoBaudRate detection can be performed
mbed_official	76:aeb1df146756	819	using USART_RequestCmd() function.
mbed_official	76:aeb1df146756	820
mbed_official	76:aeb1df146756	821	[..] The AutoBaudRate detection is monitored by the status of ABRF flag which indicate
mbed_official	76:aeb1df146756	822	that the AutoBaudRate detection is completed. In addition to ABRF flag, the ABRE flag
mbed_official	76:aeb1df146756	823	indicate that this procedure is completed without success. USART_GetFlagStatus ()
mbed_official	76:aeb1df146756	824	function should be used to monitor the status of these flags.
mbed_official	76:aeb1df146756	825
mbed_official	76:aeb1df146756	826	@endverbatim
mbed_official	76:aeb1df146756	827	* @{
mbed_official	76:aeb1df146756	828	*/
mbed_official	76:aeb1df146756	829
mbed_official	76:aeb1df146756	830	/**
mbed_official	76:aeb1df146756	831	* @brief Enables or disables the Auto Baud Rate.
mbed_official	76:aeb1df146756	832	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	833	* @note USART2 is available only for STM32F072 devices.
mbed_official	76:aeb1df146756	834	* @param NewState: new state of the USARTx auto baud rate.
mbed_official	76:aeb1df146756	835	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	836	* @retval None
mbed_official	76:aeb1df146756	837	*/
mbed_official	76:aeb1df146756	838	void USART_AutoBaudRateCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	839	{
mbed_official	76:aeb1df146756	840	/* Check the parameters */
mbed_official	76:aeb1df146756	841	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	842	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	843
mbed_official	76:aeb1df146756	844	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	845	{
mbed_official	76:aeb1df146756	846	/* Enable the auto baud rate feature by setting the ABREN bit in the CR2
mbed_official	76:aeb1df146756	847	register */
mbed_official	76:aeb1df146756	848	USARTx->CR2 \|= USART_CR2_ABREN;
mbed_official	76:aeb1df146756	849	}
mbed_official	76:aeb1df146756	850	else
mbed_official	76:aeb1df146756	851	{
mbed_official	76:aeb1df146756	852	/* Disable the auto baud rate feature by clearing the ABREN bit in the CR2
mbed_official	76:aeb1df146756	853	register */
mbed_official	76:aeb1df146756	854	USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABREN);
mbed_official	76:aeb1df146756	855	}
mbed_official	76:aeb1df146756	856	}
mbed_official	76:aeb1df146756	857
mbed_official	76:aeb1df146756	858	/**
mbed_official	76:aeb1df146756	859	* @brief Selects the USART auto baud rate method.
mbed_official	76:aeb1df146756	860	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	861	* @note USART2 is available only for STM32F072 devices.
mbed_official	76:aeb1df146756	862	* @param USART_AutoBaudRate: specifies the selected USART auto baud rate method.
mbed_official	76:aeb1df146756	863	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	864	* @arg USART_AutoBaudRate_StartBit: Start Bit duration measurement.
mbed_official	76:aeb1df146756	865	* @arg USART_AutoBaudRate_FallingEdge: Falling edge to falling edge measurement.
mbed_official	76:aeb1df146756	866	* @note This function has to be called before calling USART_Cmd() function.
mbed_official	76:aeb1df146756	867	* @retval None
mbed_official	76:aeb1df146756	868	*/
mbed_official	76:aeb1df146756	869	void USART_AutoBaudRateConfig(USART_TypeDef* USARTx, uint32_t USART_AutoBaudRate)
mbed_official	76:aeb1df146756	870	{
mbed_official	76:aeb1df146756	871	/* Check the parameters */
mbed_official	76:aeb1df146756	872	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	873	assert_param(IS_USART_AUTOBAUDRATE_MODE(USART_AutoBaudRate));
mbed_official	76:aeb1df146756	874
mbed_official	76:aeb1df146756	875	USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ABRMODE);
mbed_official	76:aeb1df146756	876	USARTx->CR2 \|= USART_AutoBaudRate;
mbed_official	76:aeb1df146756	877	}
mbed_official	76:aeb1df146756	878
mbed_official	76:aeb1df146756	879	/**
mbed_official	76:aeb1df146756	880	* @}
mbed_official	76:aeb1df146756	881	*/
mbed_official	76:aeb1df146756	882
mbed_official	76:aeb1df146756	883
mbed_official	76:aeb1df146756	884	/** @defgroup USART_Group4 Data transfers functions
mbed_official	76:aeb1df146756	885	* @brief Data transfers functions
mbed_official	76:aeb1df146756	886	*
mbed_official	76:aeb1df146756	887	@verbatim
mbed_official	76:aeb1df146756	888	===============================================================================
mbed_official	76:aeb1df146756	889	##### Data transfers functions #####
mbed_official	76:aeb1df146756	890	===============================================================================
mbed_official	76:aeb1df146756	891	[..] This subsection provides a set of functions allowing to manage
mbed_official	76:aeb1df146756	892	the USART data transfers.
mbed_official	76:aeb1df146756	893	[..] During an USART reception, data shifts in least significant bit first
mbed_official	76:aeb1df146756	894	through the RX pin. When a transmission is taking place, a write instruction to
mbed_official	76:aeb1df146756	895	the USART_TDR register stores the data in the shift register.
mbed_official	76:aeb1df146756	896	[..] The read access of the USART_RDR register can be done using
mbed_official	76:aeb1df146756	897	the USART_ReceiveData() function and returns the RDR value.
mbed_official	76:aeb1df146756	898	Whereas a write access to the USART_TDR can be done using USART_SendData()
mbed_official	76:aeb1df146756	899	function and stores the written data into TDR.
mbed_official	76:aeb1df146756	900
mbed_official	76:aeb1df146756	901	@endverbatim
mbed_official	76:aeb1df146756	902	* @{
mbed_official	76:aeb1df146756	903	*/
mbed_official	76:aeb1df146756	904
mbed_official	76:aeb1df146756	905	/**
mbed_official	76:aeb1df146756	906	* @brief Transmits single data through the USARTx peripheral.
mbed_official	76:aeb1df146756	907	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	908	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	909	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	910	* @param Data: the data to transmit.
mbed_official	76:aeb1df146756	911	* @retval None
mbed_official	76:aeb1df146756	912	*/
mbed_official	76:aeb1df146756	913	void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)
mbed_official	76:aeb1df146756	914	{
mbed_official	76:aeb1df146756	915	/* Check the parameters */
mbed_official	76:aeb1df146756	916	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	917	assert_param(IS_USART_DATA(Data));
mbed_official	76:aeb1df146756	918
mbed_official	76:aeb1df146756	919	/* Transmit Data */
mbed_official	76:aeb1df146756	920	USARTx->TDR = (Data & (uint16_t)0x01FF);
mbed_official	76:aeb1df146756	921	}
mbed_official	76:aeb1df146756	922
mbed_official	76:aeb1df146756	923	/**
mbed_official	76:aeb1df146756	924	* @brief Returns the most recent received data by the USARTx peripheral.
mbed_official	76:aeb1df146756	925	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	926	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	927	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	928	* @retval The received data.
mbed_official	76:aeb1df146756	929	*/
mbed_official	76:aeb1df146756	930	uint16_t USART_ReceiveData(USART_TypeDef* USARTx)
mbed_official	76:aeb1df146756	931	{
mbed_official	76:aeb1df146756	932	/* Check the parameters */
mbed_official	76:aeb1df146756	933	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	934
mbed_official	76:aeb1df146756	935	/* Receive Data */
mbed_official	76:aeb1df146756	936	return (uint16_t)(USARTx->RDR & (uint16_t)0x01FF);
mbed_official	76:aeb1df146756	937	}
mbed_official	76:aeb1df146756	938
mbed_official	76:aeb1df146756	939	/**
mbed_official	76:aeb1df146756	940	* @}
mbed_official	76:aeb1df146756	941	*/
mbed_official	76:aeb1df146756	942
mbed_official	76:aeb1df146756	943	/** @defgroup USART_Group5 MultiProcessor Communication functions
mbed_official	76:aeb1df146756	944	* @brief Multi-Processor Communication functions
mbed_official	76:aeb1df146756	945	*
mbed_official	76:aeb1df146756	946	@verbatim
mbed_official	76:aeb1df146756	947	===============================================================================
mbed_official	76:aeb1df146756	948	##### Multi-Processor Communication functions #####
mbed_official	76:aeb1df146756	949	===============================================================================
mbed_official	76:aeb1df146756	950	[..] This subsection provides a set of functions allowing to manage the USART
mbed_official	76:aeb1df146756	951	multiprocessor communication.
mbed_official	76:aeb1df146756	952	[..] For instance one of the USARTs can be the master, its TX output is
mbed_official	76:aeb1df146756	953	connected to the RX input of the other USART. The others are slaves,
mbed_official	76:aeb1df146756	954	their respective TX outputs are logically ANDed together and connected
mbed_official	76:aeb1df146756	955	to the RX input of the master. USART multiprocessor communication is
mbed_official	76:aeb1df146756	956	possible through the following procedure:
mbed_official	76:aeb1df146756	957	(#) Program the Baud rate, Word length = 9 bits, Stop bits, Parity,
mbed_official	76:aeb1df146756	958	Mode transmitter or Mode receiver and hardware flow control values
mbed_official	76:aeb1df146756	959	using the USART_Init() function.
mbed_official	76:aeb1df146756	960	(#) Configures the USART address using the USART_SetAddress() function.
mbed_official	76:aeb1df146756	961	(#) Configures the wake up methode (USART_WakeUp_IdleLine or
mbed_official	76:aeb1df146756	962	USART_WakeUp_AddressMark) using USART_WakeUpConfig() function only
mbed_official	76:aeb1df146756	963	for the slaves.
mbed_official	76:aeb1df146756	964	(#) Enable the USART using the USART_Cmd() function.
mbed_official	76:aeb1df146756	965	(#) Enter the USART slaves in mute mode using USART_ReceiverWakeUpCmd()
mbed_official	76:aeb1df146756	966	function.
mbed_official	76:aeb1df146756	967	[..] The USART Slave exit from mute mode when receive the wake up condition.
mbed_official	76:aeb1df146756	968
mbed_official	76:aeb1df146756	969	@endverbatim
mbed_official	76:aeb1df146756	970	* @{
mbed_official	76:aeb1df146756	971	*/
mbed_official	76:aeb1df146756	972
mbed_official	76:aeb1df146756	973	/**
mbed_official	76:aeb1df146756	974	* @brief Sets the address of the USART node.
mbed_official	76:aeb1df146756	975	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	976	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	977	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	978	* @param USART_Address: Indicates the address of the USART node.
mbed_official	76:aeb1df146756	979	* @retval None
mbed_official	76:aeb1df146756	980	*/
mbed_official	76:aeb1df146756	981	void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address)
mbed_official	76:aeb1df146756	982	{
mbed_official	76:aeb1df146756	983	/* Check the parameters */
mbed_official	76:aeb1df146756	984	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	985
mbed_official	76:aeb1df146756	986	/* Clear the USART address */
mbed_official	76:aeb1df146756	987	USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADD);
mbed_official	76:aeb1df146756	988	/* Set the USART address node */
mbed_official	76:aeb1df146756	989	USARTx->CR2 \|=((uint32_t)USART_Address << (uint32_t)0x18);
mbed_official	76:aeb1df146756	990	}
mbed_official	76:aeb1df146756	991
mbed_official	76:aeb1df146756	992	/**
mbed_official	76:aeb1df146756	993	* @brief Enables or disables the USART's mute mode.
mbed_official	76:aeb1df146756	994	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	995	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	996	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	997	* @param NewState: new state of the USART mute mode.
mbed_official	76:aeb1df146756	998	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	999	* @retval None
mbed_official	76:aeb1df146756	1000	*/
mbed_official	76:aeb1df146756	1001	void USART_MuteModeCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	1002	{
mbed_official	76:aeb1df146756	1003	/* Check the parameters */
mbed_official	76:aeb1df146756	1004	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1005	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	1006
mbed_official	76:aeb1df146756	1007	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	1008	{
mbed_official	76:aeb1df146756	1009	/* Enable the USART mute mode by setting the MME bit in the CR1 register */
mbed_official	76:aeb1df146756	1010	USARTx->CR1 \|= USART_CR1_MME;
mbed_official	76:aeb1df146756	1011	}
mbed_official	76:aeb1df146756	1012	else
mbed_official	76:aeb1df146756	1013	{
mbed_official	76:aeb1df146756	1014	/* Disable the USART mute mode by clearing the MME bit in the CR1 register */
mbed_official	76:aeb1df146756	1015	USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_MME);
mbed_official	76:aeb1df146756	1016	}
mbed_official	76:aeb1df146756	1017	}
mbed_official	76:aeb1df146756	1018
mbed_official	76:aeb1df146756	1019	/**
mbed_official	76:aeb1df146756	1020	* @brief Selects the USART WakeUp method from mute mode.
mbed_official	76:aeb1df146756	1021	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1022	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1023	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1024	* @param USART_WakeUp: specifies the USART wakeup method.
mbed_official	76:aeb1df146756	1025	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	1026	* @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection
mbed_official	76:aeb1df146756	1027	* @arg USART_WakeUp_AddressMark: WakeUp by an address mark
mbed_official	76:aeb1df146756	1028	* @retval None
mbed_official	76:aeb1df146756	1029	*/
mbed_official	76:aeb1df146756	1030	void USART_MuteModeWakeUpConfig(USART_TypeDef* USARTx, uint32_t USART_WakeUp)
mbed_official	76:aeb1df146756	1031	{
mbed_official	76:aeb1df146756	1032	/* Check the parameters */
mbed_official	76:aeb1df146756	1033	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1034	assert_param(IS_USART_MUTEMODE_WAKEUP(USART_WakeUp));
mbed_official	76:aeb1df146756	1035
mbed_official	76:aeb1df146756	1036	USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_WAKE);
mbed_official	76:aeb1df146756	1037	USARTx->CR1 \|= USART_WakeUp;
mbed_official	76:aeb1df146756	1038	}
mbed_official	76:aeb1df146756	1039
mbed_official	76:aeb1df146756	1040	/**
mbed_official	76:aeb1df146756	1041	* @brief Configure the the USART Address detection length.
mbed_official	76:aeb1df146756	1042	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1043	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1044	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1045	* @param USART_AddressLength: specifies the USART address length detection.
mbed_official	76:aeb1df146756	1046	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	1047	* @arg USART_AddressLength_4b: 4-bit address length detection
mbed_official	76:aeb1df146756	1048	* @arg USART_AddressLength_7b: 7-bit address length detection
mbed_official	76:aeb1df146756	1049	* @retval None
mbed_official	76:aeb1df146756	1050	*/
mbed_official	76:aeb1df146756	1051	void USART_AddressDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_AddressLength)
mbed_official	76:aeb1df146756	1052	{
mbed_official	76:aeb1df146756	1053	/* Check the parameters */
mbed_official	76:aeb1df146756	1054	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1055	assert_param(IS_USART_ADDRESS_DETECTION(USART_AddressLength));
mbed_official	76:aeb1df146756	1056
mbed_official	76:aeb1df146756	1057	USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_ADDM7);
mbed_official	76:aeb1df146756	1058	USARTx->CR2 \|= USART_AddressLength;
mbed_official	76:aeb1df146756	1059	}
mbed_official	76:aeb1df146756	1060
mbed_official	76:aeb1df146756	1061	/**
mbed_official	76:aeb1df146756	1062	* @}
mbed_official	76:aeb1df146756	1063	*/
mbed_official	76:aeb1df146756	1064
mbed_official	76:aeb1df146756	1065	/** @defgroup USART_Group6 LIN mode functions
mbed_official	76:aeb1df146756	1066	* @brief LIN mode functions
mbed_official	76:aeb1df146756	1067	*
mbed_official	76:aeb1df146756	1068	@verbatim
mbed_official	76:aeb1df146756	1069	===============================================================================
mbed_official	76:aeb1df146756	1070	##### LIN mode functions #####
mbed_official	76:aeb1df146756	1071	===============================================================================
mbed_official	76:aeb1df146756	1072	[..] This subsection provides a set of functions allowing to manage the USART
mbed_official	76:aeb1df146756	1073	LIN Mode communication.
mbed_official	76:aeb1df146756	1074	[..] In LIN mode, 8-bit data format with 1 stop bit is required in accordance
mbed_official	76:aeb1df146756	1075	with the LIN standard.
mbed_official	76:aeb1df146756	1076	[..] Only this LIN Feature is supported by the USART IP:
mbed_official	76:aeb1df146756	1077	(+) LIN Master Synchronous Break send capability and LIN slave break
mbed_official	76:aeb1df146756	1078	detection capability : 13-bit break generation and 10/11 bit break
mbed_official	76:aeb1df146756	1079	detection.
mbed_official	76:aeb1df146756	1080	[..] USART LIN Master transmitter communication is possible through the
mbed_official	76:aeb1df146756	1081	following procedure:
mbed_official	76:aeb1df146756	1082	(#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity,
mbed_official	76:aeb1df146756	1083	Mode transmitter or Mode receiver and hardware flow control values
mbed_official	76:aeb1df146756	1084	using the USART_Init() function.
mbed_official	76:aeb1df146756	1085	(#) Enable the LIN mode using the USART_LINCmd() function.
mbed_official	76:aeb1df146756	1086	(#) Enable the USART using the USART_Cmd() function.
mbed_official	76:aeb1df146756	1087	(#) Send the break character using USART_SendBreak() function.
mbed_official	76:aeb1df146756	1088	[..] USART LIN Master receiver communication is possible through the
mbed_official	76:aeb1df146756	1089	following procedure:
mbed_official	76:aeb1df146756	1090	(#) Program the Baud rate, Word length = 8bits, Stop bits = 1bit, Parity,
mbed_official	76:aeb1df146756	1091	Mode transmitter or Mode receiver and hardware flow control values
mbed_official	76:aeb1df146756	1092	using the USART_Init() function.
mbed_official	76:aeb1df146756	1093	(#) Configures the break detection length
mbed_official	76:aeb1df146756	1094	using the USART_LINBreakDetectLengthConfig() function.
mbed_official	76:aeb1df146756	1095	(#) Enable the LIN mode using the USART_LINCmd() function.
mbed_official	76:aeb1df146756	1096	-@- In LIN mode, the following bits must be kept cleared:
mbed_official	76:aeb1df146756	1097	(+@) CLKEN in the USART_CR2 register.
mbed_official	76:aeb1df146756	1098	(+@) STOP[1:0], SCEN, HDSEL and IREN in the USART_CR3 register.
mbed_official	76:aeb1df146756	1099	(#) Enable the USART using the USART_Cmd() function.
mbed_official	76:aeb1df146756	1100
mbed_official	76:aeb1df146756	1101	@endverbatim
mbed_official	76:aeb1df146756	1102	* @{
mbed_official	76:aeb1df146756	1103	*/
mbed_official	76:aeb1df146756	1104
mbed_official	76:aeb1df146756	1105	/**
mbed_official	76:aeb1df146756	1106	* @brief Sets the USART LIN Break detection length.
mbed_official	76:aeb1df146756	1107	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1108	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	1109	* @note USART2 is available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1110	* @param USART_LINBreakDetectLength: specifies the LIN break detection length.
mbed_official	76:aeb1df146756	1111	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	1112	* @arg USART_LINBreakDetectLength_10b: 10-bit break detection
mbed_official	76:aeb1df146756	1113	* @arg USART_LINBreakDetectLength_11b: 11-bit break detection
mbed_official	76:aeb1df146756	1114	* @retval None
mbed_official	76:aeb1df146756	1115	*/
mbed_official	76:aeb1df146756	1116	void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint32_t USART_LINBreakDetectLength)
mbed_official	76:aeb1df146756	1117	{
mbed_official	76:aeb1df146756	1118	/* Check the parameters */
mbed_official	76:aeb1df146756	1119	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1120	assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength));
mbed_official	76:aeb1df146756	1121
mbed_official	76:aeb1df146756	1122	USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_LBDL);
mbed_official	76:aeb1df146756	1123	USARTx->CR2 \|= USART_LINBreakDetectLength;
mbed_official	76:aeb1df146756	1124	}
mbed_official	76:aeb1df146756	1125
mbed_official	76:aeb1df146756	1126	/**
mbed_official	76:aeb1df146756	1127	* @brief Enables or disables the USART's LIN mode.
mbed_official	76:aeb1df146756	1128	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1129	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	1130	* @note USART2 is available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1131	* @param NewState: new state of the USART LIN mode.
mbed_official	76:aeb1df146756	1132	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	1133	* @retval None
mbed_official	76:aeb1df146756	1134	*/
mbed_official	76:aeb1df146756	1135	void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	1136	{
mbed_official	76:aeb1df146756	1137	/* Check the parameters */
mbed_official	76:aeb1df146756	1138	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1139	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	1140
mbed_official	76:aeb1df146756	1141	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	1142	{
mbed_official	76:aeb1df146756	1143	/* Enable the LIN mode by setting the LINEN bit in the CR2 register */
mbed_official	76:aeb1df146756	1144	USARTx->CR2 \|= USART_CR2_LINEN;
mbed_official	76:aeb1df146756	1145	}
mbed_official	76:aeb1df146756	1146	else
mbed_official	76:aeb1df146756	1147	{
mbed_official	76:aeb1df146756	1148	/* Disable the LIN mode by clearing the LINEN bit in the CR2 register */
mbed_official	76:aeb1df146756	1149	USARTx->CR2 &= (uint32_t)~((uint32_t)USART_CR2_LINEN);
mbed_official	76:aeb1df146756	1150	}
mbed_official	76:aeb1df146756	1151	}
mbed_official	76:aeb1df146756	1152
mbed_official	76:aeb1df146756	1153	/**
mbed_official	76:aeb1df146756	1154	* @}
mbed_official	76:aeb1df146756	1155	*/
mbed_official	76:aeb1df146756	1156
mbed_official	76:aeb1df146756	1157	/** @defgroup USART_Group7 Halfduplex mode function
mbed_official	76:aeb1df146756	1158	* @brief Half-duplex mode function
mbed_official	76:aeb1df146756	1159	*
mbed_official	76:aeb1df146756	1160	@verbatim
mbed_official	76:aeb1df146756	1161	===============================================================================
mbed_official	76:aeb1df146756	1162	##### Half-duplex mode function #####
mbed_official	76:aeb1df146756	1163	===============================================================================
mbed_official	76:aeb1df146756	1164	[..] This subsection provides a set of functions allowing to manage the USART
mbed_official	76:aeb1df146756	1165	Half-duplex communication.
mbed_official	76:aeb1df146756	1166	[..] The USART can be configured to follow a single-wire half-duplex protocol
mbed_official	76:aeb1df146756	1167	where the TX and RX lines are internally connected.
mbed_official	76:aeb1df146756	1168	[..] USART Half duplex communication is possible through the following procedure:
mbed_official	76:aeb1df146756	1169	(#) Program the Baud rate, Word length, Stop bits, Parity, Mode transmitter
mbed_official	76:aeb1df146756	1170	or Mode receiver and hardware flow control values using the USART_Init()
mbed_official	76:aeb1df146756	1171	function.
mbed_official	76:aeb1df146756	1172	(#) Configures the USART address using the USART_SetAddress() function.
mbed_official	76:aeb1df146756	1173	(#) Enable the half duplex mode using USART_HalfDuplexCmd() function.
mbed_official	76:aeb1df146756	1174	(#) Enable the USART using the USART_Cmd() function.
mbed_official	76:aeb1df146756	1175	-@- The RX pin is no longer used.
mbed_official	76:aeb1df146756	1176	-@- In Half-duplex mode the following bits must be kept cleared:
mbed_official	76:aeb1df146756	1177	(+@) LINEN and CLKEN bits in the USART_CR2 register.
mbed_official	76:aeb1df146756	1178	(+@) SCEN and IREN bits in the USART_CR3 register.
mbed_official	76:aeb1df146756	1179
mbed_official	76:aeb1df146756	1180	@endverbatim
mbed_official	76:aeb1df146756	1181	* @{
mbed_official	76:aeb1df146756	1182	*/
mbed_official	76:aeb1df146756	1183
mbed_official	76:aeb1df146756	1184	/**
mbed_official	76:aeb1df146756	1185	* @brief Enables or disables the USART's Half Duplex communication.
mbed_official	76:aeb1df146756	1186	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1187	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1188	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1189	* @param NewState: new state of the USART Communication.
mbed_official	76:aeb1df146756	1190	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	1191	* @retval None
mbed_official	76:aeb1df146756	1192	*/
mbed_official	76:aeb1df146756	1193	void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	1194	{
mbed_official	76:aeb1df146756	1195	/* Check the parameters */
mbed_official	76:aeb1df146756	1196	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1197	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	1198
mbed_official	76:aeb1df146756	1199	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	1200	{
mbed_official	76:aeb1df146756	1201	/* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
mbed_official	76:aeb1df146756	1202	USARTx->CR3 \|= USART_CR3_HDSEL;
mbed_official	76:aeb1df146756	1203	}
mbed_official	76:aeb1df146756	1204	else
mbed_official	76:aeb1df146756	1205	{
mbed_official	76:aeb1df146756	1206	/* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */
mbed_official	76:aeb1df146756	1207	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_HDSEL);
mbed_official	76:aeb1df146756	1208	}
mbed_official	76:aeb1df146756	1209	}
mbed_official	76:aeb1df146756	1210
mbed_official	76:aeb1df146756	1211	/**
mbed_official	76:aeb1df146756	1212	* @}
mbed_official	76:aeb1df146756	1213	*/
mbed_official	76:aeb1df146756	1214
mbed_official	76:aeb1df146756	1215
mbed_official	76:aeb1df146756	1216	/** @defgroup USART_Group8 Smartcard mode functions
mbed_official	76:aeb1df146756	1217	* @brief Smartcard mode functions
mbed_official	76:aeb1df146756	1218	*
mbed_official	76:aeb1df146756	1219	@verbatim
mbed_official	76:aeb1df146756	1220	===============================================================================
mbed_official	76:aeb1df146756	1221	##### Smartcard mode functions #####
mbed_official	76:aeb1df146756	1222	===============================================================================
mbed_official	76:aeb1df146756	1223	[..] This subsection provides a set of functions allowing to manage the USART
mbed_official	76:aeb1df146756	1224	Smartcard communication.
mbed_official	76:aeb1df146756	1225	[..] The Smartcard interface is designed to support asynchronous protocol
mbed_official	76:aeb1df146756	1226	Smartcards as defined in the ISO 7816-3 standard. The USART can provide
mbed_official	76:aeb1df146756	1227	a clock to the smartcard through the SCLK output. In smartcard mode,
mbed_official	76:aeb1df146756	1228	SCLK is not associated to the communication but is simply derived from
mbed_official	76:aeb1df146756	1229	the internal peripheral input clock through a 5-bit prescaler.
mbed_official	76:aeb1df146756	1230	[..] Smartcard communication is possible through the following procedure:
mbed_official	76:aeb1df146756	1231	(#) Configures the Smartcard Prsecaler using the USART_SetPrescaler()
mbed_official	76:aeb1df146756	1232	function.
mbed_official	76:aeb1df146756	1233	(#) Configures the Smartcard Guard Time using the USART_SetGuardTime()
mbed_official	76:aeb1df146756	1234	function.
mbed_official	76:aeb1df146756	1235	(#) Program the USART clock using the USART_ClockInit() function as following:
mbed_official	76:aeb1df146756	1236	(++) USART Clock enabled.
mbed_official	76:aeb1df146756	1237	(++) USART CPOL Low.
mbed_official	76:aeb1df146756	1238	(++) USART CPHA on first edge.
mbed_official	76:aeb1df146756	1239	(++) USART Last Bit Clock Enabled.
mbed_official	76:aeb1df146756	1240	(#) Program the Smartcard interface using the USART_Init() function as
mbed_official	76:aeb1df146756	1241	following:
mbed_official	76:aeb1df146756	1242	(++) Word Length = 9 Bits.
mbed_official	76:aeb1df146756	1243	(++) 1.5 Stop Bit.
mbed_official	76:aeb1df146756	1244	(++) Even parity.
mbed_official	76:aeb1df146756	1245	(++) BaudRate = 12096 baud.
mbed_official	76:aeb1df146756	1246	(++) Hardware flow control disabled (RTS and CTS signals).
mbed_official	76:aeb1df146756	1247	(++) Tx and Rx enabled
mbed_official	76:aeb1df146756	1248	(#) Optionally you can enable the parity error interrupt using
mbed_official	76:aeb1df146756	1249	the USART_ITConfig() function.
mbed_official	76:aeb1df146756	1250	(#) Enable the Smartcard NACK using the USART_SmartCardNACKCmd() function.
mbed_official	76:aeb1df146756	1251	(#) Enable the Smartcard interface using the USART_SmartCardCmd() function.
mbed_official	76:aeb1df146756	1252	(#) Enable the USART using the USART_Cmd() function.
mbed_official	76:aeb1df146756	1253	[..]
mbed_official	76:aeb1df146756	1254	Please refer to the ISO 7816-3 specification for more details.
mbed_official	76:aeb1df146756	1255	[..]
mbed_official	76:aeb1df146756	1256	(@) It is also possible to choose 0.5 stop bit for receiving but it is
mbed_official	76:aeb1df146756	1257	recommended to use 1.5 stop bits for both transmitting and receiving
mbed_official	76:aeb1df146756	1258	to avoid switching between the two configurations.
mbed_official	76:aeb1df146756	1259	(@) In smartcard mode, the following bits must be kept cleared:
mbed_official	76:aeb1df146756	1260	(+@) LINEN bit in the USART_CR2 register.
mbed_official	76:aeb1df146756	1261	(+@) HDSEL and IREN bits in the USART_CR3 register.
mbed_official	76:aeb1df146756	1262
mbed_official	76:aeb1df146756	1263	@endverbatim
mbed_official	76:aeb1df146756	1264	* @{
mbed_official	76:aeb1df146756	1265	*/
mbed_official	76:aeb1df146756	1266
mbed_official	76:aeb1df146756	1267	/**
mbed_official	76:aeb1df146756	1268	* @brief Sets the specified USART guard time.
mbed_official	76:aeb1df146756	1269	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1270	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	1271	* @note USART2 is applicable only for STM32F072 devices.
mbed_official	76:aeb1df146756	1272	* @param USART_GuardTime: specifies the guard time.
mbed_official	76:aeb1df146756	1273	* @retval None
mbed_official	76:aeb1df146756	1274	*/
mbed_official	76:aeb1df146756	1275	void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime)
mbed_official	76:aeb1df146756	1276	{
mbed_official	76:aeb1df146756	1277	/* Check the parameters */
mbed_official	76:aeb1df146756	1278	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1279
mbed_official	76:aeb1df146756	1280	/* Clear the USART Guard time */
mbed_official	76:aeb1df146756	1281	USARTx->GTPR &= USART_GTPR_PSC;
mbed_official	76:aeb1df146756	1282	/* Set the USART guard time */
mbed_official	76:aeb1df146756	1283	USARTx->GTPR \|= (uint16_t)((uint16_t)USART_GuardTime << 0x08);
mbed_official	76:aeb1df146756	1284	}
mbed_official	76:aeb1df146756	1285
mbed_official	76:aeb1df146756	1286	/**
mbed_official	76:aeb1df146756	1287	* @brief Enables or disables the USART's Smart Card mode.
mbed_official	76:aeb1df146756	1288	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1289	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	1290	* @note USART2 is applicable only for STM32F072 devices.
mbed_official	76:aeb1df146756	1291	* @param NewState: new state of the Smart Card mode.
mbed_official	76:aeb1df146756	1292	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	1293	* @retval None
mbed_official	76:aeb1df146756	1294	*/
mbed_official	76:aeb1df146756	1295	void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	1296	{
mbed_official	76:aeb1df146756	1297	/* Check the parameters */
mbed_official	76:aeb1df146756	1298	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1299	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	1300	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	1301	{
mbed_official	76:aeb1df146756	1302	/* Enable the SC mode by setting the SCEN bit in the CR3 register */
mbed_official	76:aeb1df146756	1303	USARTx->CR3 \|= USART_CR3_SCEN;
mbed_official	76:aeb1df146756	1304	}
mbed_official	76:aeb1df146756	1305	else
mbed_official	76:aeb1df146756	1306	{
mbed_official	76:aeb1df146756	1307	/* Disable the SC mode by clearing the SCEN bit in the CR3 register */
mbed_official	76:aeb1df146756	1308	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_SCEN);
mbed_official	76:aeb1df146756	1309	}
mbed_official	76:aeb1df146756	1310	}
mbed_official	76:aeb1df146756	1311
mbed_official	76:aeb1df146756	1312	/**
mbed_official	76:aeb1df146756	1313	* @brief Enables or disables NACK transmission.
mbed_official	76:aeb1df146756	1314	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1315	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	1316	* @note USART2 is applicable only for STM32F072 devices.
mbed_official	76:aeb1df146756	1317	* @param NewState: new state of the NACK transmission.
mbed_official	76:aeb1df146756	1318	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	1319	* @retval None
mbed_official	76:aeb1df146756	1320	*/
mbed_official	76:aeb1df146756	1321	void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	1322	{
mbed_official	76:aeb1df146756	1323	/* Check the parameters */
mbed_official	76:aeb1df146756	1324	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1325	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	1326	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	1327	{
mbed_official	76:aeb1df146756	1328	/* Enable the NACK transmission by setting the NACK bit in the CR3 register */
mbed_official	76:aeb1df146756	1329	USARTx->CR3 \|= USART_CR3_NACK;
mbed_official	76:aeb1df146756	1330	}
mbed_official	76:aeb1df146756	1331	else
mbed_official	76:aeb1df146756	1332	{
mbed_official	76:aeb1df146756	1333	/* Disable the NACK transmission by clearing the NACK bit in the CR3 register */
mbed_official	76:aeb1df146756	1334	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_NACK);
mbed_official	76:aeb1df146756	1335	}
mbed_official	76:aeb1df146756	1336	}
mbed_official	76:aeb1df146756	1337
mbed_official	76:aeb1df146756	1338	/**
mbed_official	76:aeb1df146756	1339	* @brief Sets the Smart Card number of retries in transmit and receive.
mbed_official	76:aeb1df146756	1340	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1341	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	1342	* @note USART2 is applicable only for STM32F072 devices.
mbed_official	76:aeb1df146756	1343	* @param USART_AutoCount: specifies the Smart Card auto retry count.
mbed_official	76:aeb1df146756	1344	* @retval None
mbed_official	76:aeb1df146756	1345	*/
mbed_official	76:aeb1df146756	1346	void USART_SetAutoRetryCount(USART_TypeDef* USARTx, uint8_t USART_AutoCount)
mbed_official	76:aeb1df146756	1347	{
mbed_official	76:aeb1df146756	1348	/* Check the parameters */
mbed_official	76:aeb1df146756	1349	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1350	assert_param(IS_USART_AUTO_RETRY_COUNTER(USART_AutoCount));
mbed_official	76:aeb1df146756	1351	/* Clear the USART auto retry count */
mbed_official	76:aeb1df146756	1352	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_SCARCNT);
mbed_official	76:aeb1df146756	1353	/* Set the USART auto retry count*/
mbed_official	76:aeb1df146756	1354	USARTx->CR3 \|= (uint32_t)((uint32_t)USART_AutoCount << 0x11);
mbed_official	76:aeb1df146756	1355	}
mbed_official	76:aeb1df146756	1356
mbed_official	76:aeb1df146756	1357	/**
mbed_official	76:aeb1df146756	1358	* @brief Sets the Smart Card Block length.
mbed_official	76:aeb1df146756	1359	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1360	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	1361	* @note USART2 is applicable only for STM32F072 devices.
mbed_official	76:aeb1df146756	1362	* @param USART_BlockLength: specifies the Smart Card block length.
mbed_official	76:aeb1df146756	1363	* @retval None
mbed_official	76:aeb1df146756	1364	*/
mbed_official	76:aeb1df146756	1365	void USART_SetBlockLength(USART_TypeDef* USARTx, uint8_t USART_BlockLength)
mbed_official	76:aeb1df146756	1366	{
mbed_official	76:aeb1df146756	1367	/* Check the parameters */
mbed_official	76:aeb1df146756	1368	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1369
mbed_official	76:aeb1df146756	1370	/* Clear the Smart card block length */
mbed_official	76:aeb1df146756	1371	USARTx->RTOR &= (uint32_t)~((uint32_t)USART_RTOR_BLEN);
mbed_official	76:aeb1df146756	1372	/* Set the Smart Card block length */
mbed_official	76:aeb1df146756	1373	USARTx->RTOR \|= (uint32_t)((uint32_t)USART_BlockLength << 0x18);
mbed_official	76:aeb1df146756	1374	}
mbed_official	76:aeb1df146756	1375
mbed_official	76:aeb1df146756	1376	/**
mbed_official	76:aeb1df146756	1377	* @}
mbed_official	76:aeb1df146756	1378	*/
mbed_official	76:aeb1df146756	1379
mbed_official	76:aeb1df146756	1380	/** @defgroup USART_Group9 IrDA mode functions
mbed_official	76:aeb1df146756	1381	* @brief IrDA mode functions
mbed_official	76:aeb1df146756	1382	*
mbed_official	76:aeb1df146756	1383	@verbatim
mbed_official	76:aeb1df146756	1384	===============================================================================
mbed_official	76:aeb1df146756	1385	##### IrDA mode functions #####
mbed_official	76:aeb1df146756	1386	===============================================================================
mbed_official	76:aeb1df146756	1387	[..] This subsection provides a set of functions allowing to manage the USART
mbed_official	76:aeb1df146756	1388	IrDA communication.
mbed_official	76:aeb1df146756	1389	[..] IrDA is a half duplex communication protocol. If the Transmitter is busy,
mbed_official	76:aeb1df146756	1390	any data on the IrDA receive line will be ignored by the IrDA decoder
mbed_official	76:aeb1df146756	1391	and if the Receiver is busy, data on the TX from the USART to IrDA will
mbed_official	76:aeb1df146756	1392	not be encoded by IrDA. While receiving data, transmission should be
mbed_official	76:aeb1df146756	1393	avoided as the data to be transmitted could be corrupted.
mbed_official	76:aeb1df146756	1394	[..] IrDA communication is possible through the following procedure:
mbed_official	76:aeb1df146756	1395	(#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity,
mbed_official	76:aeb1df146756	1396	Transmitter/Receiver modes and hardware flow control values using
mbed_official	76:aeb1df146756	1397	the USART_Init() function.
mbed_official	76:aeb1df146756	1398	(#) Configures the IrDA pulse width by configuring the prescaler using
mbed_official	76:aeb1df146756	1399	the USART_SetPrescaler() function.
mbed_official	76:aeb1df146756	1400	(#) Configures the IrDA USART_IrDAMode_LowPower or USART_IrDAMode_Normal
mbed_official	76:aeb1df146756	1401	mode using the USART_IrDAConfig() function.
mbed_official	76:aeb1df146756	1402	(#) Enable the IrDA using the USART_IrDACmd() function.
mbed_official	76:aeb1df146756	1403	(#) Enable the USART using the USART_Cmd() function.
mbed_official	76:aeb1df146756	1404	[..]
mbed_official	76:aeb1df146756	1405	(@) A pulse of width less than two and greater than one PSC period(s) may or
mbed_official	76:aeb1df146756	1406	may not be rejected.
mbed_official	76:aeb1df146756	1407	(@) The receiver set up time should be managed by software. The IrDA physical
mbed_official	76:aeb1df146756	1408	layer specification specifies a minimum of 10 ms delay between
mbed_official	76:aeb1df146756	1409	transmission and reception (IrDA is a half duplex protocol).
mbed_official	76:aeb1df146756	1410	(@) In IrDA mode, the following bits must be kept cleared:
mbed_official	76:aeb1df146756	1411	(+@) LINEN, STOP and CLKEN bits in the USART_CR2 register.
mbed_official	76:aeb1df146756	1412	(+@) SCEN and HDSEL bits in the USART_CR3 register.
mbed_official	76:aeb1df146756	1413
mbed_official	76:aeb1df146756	1414	@endverbatim
mbed_official	76:aeb1df146756	1415	* @{
mbed_official	76:aeb1df146756	1416	*/
mbed_official	76:aeb1df146756	1417
mbed_official	76:aeb1df146756	1418	/**
mbed_official	76:aeb1df146756	1419	* @brief Configures the USART's IrDA interface.
mbed_official	76:aeb1df146756	1420	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1421	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	1422	* @note USART2 is applicable only for STM32F072 devices.
mbed_official	76:aeb1df146756	1423	* @param USART_IrDAMode: specifies the IrDA mode.
mbed_official	76:aeb1df146756	1424	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	1425	* @arg USART_IrDAMode_LowPower
mbed_official	76:aeb1df146756	1426	* @arg USART_IrDAMode_Normal
mbed_official	76:aeb1df146756	1427	* @retval None
mbed_official	76:aeb1df146756	1428	*/
mbed_official	76:aeb1df146756	1429	void USART_IrDAConfig(USART_TypeDef* USARTx, uint32_t USART_IrDAMode)
mbed_official	76:aeb1df146756	1430	{
mbed_official	76:aeb1df146756	1431	/* Check the parameters */
mbed_official	76:aeb1df146756	1432	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1433	assert_param(IS_USART_IRDA_MODE(USART_IrDAMode));
mbed_official	76:aeb1df146756	1434
mbed_official	76:aeb1df146756	1435	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_IRLP);
mbed_official	76:aeb1df146756	1436	USARTx->CR3 \|= USART_IrDAMode;
mbed_official	76:aeb1df146756	1437	}
mbed_official	76:aeb1df146756	1438
mbed_official	76:aeb1df146756	1439	/**
mbed_official	76:aeb1df146756	1440	* @brief Enables or disables the USART's IrDA interface.
mbed_official	76:aeb1df146756	1441	* @note This function is not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1442	* @param USARTx: where x can be 1or 2 to select the USART peripheral.
mbed_official	76:aeb1df146756	1443	* @note USART2 is applicable only for STM32F072 devices.
mbed_official	76:aeb1df146756	1444	* @param NewState: new state of the IrDA mode.
mbed_official	76:aeb1df146756	1445	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	1446	* @retval None
mbed_official	76:aeb1df146756	1447	*/
mbed_official	76:aeb1df146756	1448	void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	1449	{
mbed_official	76:aeb1df146756	1450	/* Check the parameters */
mbed_official	76:aeb1df146756	1451	assert_param(IS_USART_12_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1452	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	1453
mbed_official	76:aeb1df146756	1454	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	1455	{
mbed_official	76:aeb1df146756	1456	/* Enable the IrDA mode by setting the IREN bit in the CR3 register */
mbed_official	76:aeb1df146756	1457	USARTx->CR3 \|= USART_CR3_IREN;
mbed_official	76:aeb1df146756	1458	}
mbed_official	76:aeb1df146756	1459	else
mbed_official	76:aeb1df146756	1460	{
mbed_official	76:aeb1df146756	1461	/* Disable the IrDA mode by clearing the IREN bit in the CR3 register */
mbed_official	76:aeb1df146756	1462	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_IREN);
mbed_official	76:aeb1df146756	1463	}
mbed_official	76:aeb1df146756	1464	}
mbed_official	76:aeb1df146756	1465	/**
mbed_official	76:aeb1df146756	1466	* @}
mbed_official	76:aeb1df146756	1467	*/
mbed_official	76:aeb1df146756	1468
mbed_official	76:aeb1df146756	1469	/** @defgroup USART_Group10 RS485 mode function
mbed_official	76:aeb1df146756	1470	* @brief RS485 mode function
mbed_official	76:aeb1df146756	1471	*
mbed_official	76:aeb1df146756	1472	@verbatim
mbed_official	76:aeb1df146756	1473	===============================================================================
mbed_official	76:aeb1df146756	1474	##### RS485 mode functions #####
mbed_official	76:aeb1df146756	1475	===============================================================================
mbed_official	76:aeb1df146756	1476	[..] This subsection provides a set of functions allowing to manage the USART
mbed_official	76:aeb1df146756	1477	RS485 flow control.
mbed_official	76:aeb1df146756	1478	[..] RS485 flow control (Driver enable feature) handling is possible through
mbed_official	76:aeb1df146756	1479	the following procedure:
mbed_official	76:aeb1df146756	1480	(#) Program the Baud rate, Word length = 8 bits, Stop bits, Parity,
mbed_official	76:aeb1df146756	1481	Transmitter/Receiver modes and hardware flow control values using
mbed_official	76:aeb1df146756	1482	the USART_Init() function.
mbed_official	76:aeb1df146756	1483	(#) Enable the Driver Enable using the USART_DECmd() function.
mbed_official	76:aeb1df146756	1484	(#) Configures the Driver Enable polarity using the USART_DEPolarityConfig()
mbed_official	76:aeb1df146756	1485	function.
mbed_official	76:aeb1df146756	1486	(#) Configures the Driver Enable assertion time using USART_SetDEAssertionTime()
mbed_official	76:aeb1df146756	1487	function and deassertion time using the USART_SetDEDeassertionTime()
mbed_official	76:aeb1df146756	1488	function.
mbed_official	76:aeb1df146756	1489	(#) Enable the USART using the USART_Cmd() function.
mbed_official	76:aeb1df146756	1490	-@-
mbed_official	76:aeb1df146756	1491	(+@) The assertion and dessertion times are expressed in sample time units (1/8 or
mbed_official	76:aeb1df146756	1492	1/16 bit time, depending on the oversampling rate).
mbed_official	76:aeb1df146756	1493
mbed_official	76:aeb1df146756	1494	@endverbatim
mbed_official	76:aeb1df146756	1495	* @{
mbed_official	76:aeb1df146756	1496	*/
mbed_official	76:aeb1df146756	1497
mbed_official	76:aeb1df146756	1498	/**
mbed_official	76:aeb1df146756	1499	* @brief Enables or disables the USART's DE functionality.
mbed_official	76:aeb1df146756	1500	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1501	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1502	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1503	* @param NewState: new state of the driver enable mode.
mbed_official	76:aeb1df146756	1504	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	1505	* @retval None
mbed_official	76:aeb1df146756	1506	*/
mbed_official	76:aeb1df146756	1507	void USART_DECmd(USART_TypeDef* USARTx, FunctionalState NewState)
mbed_official	76:aeb1df146756	1508	{
mbed_official	76:aeb1df146756	1509	/* Check the parameters */
mbed_official	76:aeb1df146756	1510	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1511	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	1512	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	1513	{
mbed_official	76:aeb1df146756	1514	/* Enable the DE functionality by setting the DEM bit in the CR3 register */
mbed_official	76:aeb1df146756	1515	USARTx->CR3 \|= USART_CR3_DEM;
mbed_official	76:aeb1df146756	1516	}
mbed_official	76:aeb1df146756	1517	else
mbed_official	76:aeb1df146756	1518	{
mbed_official	76:aeb1df146756	1519	/* Disable the DE functionality by clearing the DEM bit in the CR3 register */
mbed_official	76:aeb1df146756	1520	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEM);
mbed_official	76:aeb1df146756	1521	}
mbed_official	76:aeb1df146756	1522	}
mbed_official	76:aeb1df146756	1523
mbed_official	76:aeb1df146756	1524	/**
mbed_official	76:aeb1df146756	1525	* @brief Configures the USART's DE polarity
mbed_official	76:aeb1df146756	1526	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1527	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1528	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1529	* @param USART_DEPolarity: specifies the DE polarity.
mbed_official	76:aeb1df146756	1530	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	1531	* @arg USART_DEPolarity_Low
mbed_official	76:aeb1df146756	1532	* @arg USART_DEPolarity_High
mbed_official	76:aeb1df146756	1533	* @retval None
mbed_official	76:aeb1df146756	1534	*/
mbed_official	76:aeb1df146756	1535	void USART_DEPolarityConfig(USART_TypeDef* USARTx, uint32_t USART_DEPolarity)
mbed_official	76:aeb1df146756	1536	{
mbed_official	76:aeb1df146756	1537	/* Check the parameters */
mbed_official	76:aeb1df146756	1538	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1539	assert_param(IS_USART_DE_POLARITY(USART_DEPolarity));
mbed_official	76:aeb1df146756	1540
mbed_official	76:aeb1df146756	1541	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DEP);
mbed_official	76:aeb1df146756	1542	USARTx->CR3 \|= USART_DEPolarity;
mbed_official	76:aeb1df146756	1543	}
mbed_official	76:aeb1df146756	1544
mbed_official	76:aeb1df146756	1545	/**
mbed_official	76:aeb1df146756	1546	* @brief Sets the specified RS485 DE assertion time
mbed_official	76:aeb1df146756	1547	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1548	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1549	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1550	* @param USART_DEAssertionTime: specifies the time between the activation of
mbed_official	76:aeb1df146756	1551	* the DE signal and the beginning of the start bit
mbed_official	76:aeb1df146756	1552	* @retval None
mbed_official	76:aeb1df146756	1553	*/
mbed_official	76:aeb1df146756	1554	void USART_SetDEAssertionTime(USART_TypeDef* USARTx, uint32_t USART_DEAssertionTime)
mbed_official	76:aeb1df146756	1555	{
mbed_official	76:aeb1df146756	1556	/* Check the parameters */
mbed_official	76:aeb1df146756	1557	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1558	assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEAssertionTime));
mbed_official	76:aeb1df146756	1559
mbed_official	76:aeb1df146756	1560	/* Clear the DE assertion time */
mbed_official	76:aeb1df146756	1561	USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEAT);
mbed_official	76:aeb1df146756	1562	/* Set the new value for the DE assertion time */
mbed_official	76:aeb1df146756	1563	USARTx->CR1 \|=((uint32_t)USART_DEAssertionTime << (uint32_t)0x15);
mbed_official	76:aeb1df146756	1564	}
mbed_official	76:aeb1df146756	1565
mbed_official	76:aeb1df146756	1566	/**
mbed_official	76:aeb1df146756	1567	* @brief Sets the specified RS485 DE deassertion time
mbed_official	76:aeb1df146756	1568	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1569	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1570	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1571	* @param USART_DeassertionTime: specifies the time between the middle of the last
mbed_official	76:aeb1df146756	1572	* stop bit in a transmitted message and the de-activation of the DE signal
mbed_official	76:aeb1df146756	1573	* @retval None
mbed_official	76:aeb1df146756	1574	*/
mbed_official	76:aeb1df146756	1575	void USART_SetDEDeassertionTime(USART_TypeDef* USARTx, uint32_t USART_DEDeassertionTime)
mbed_official	76:aeb1df146756	1576	{
mbed_official	76:aeb1df146756	1577	/* Check the parameters */
mbed_official	76:aeb1df146756	1578	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1579	assert_param(IS_USART_DE_ASSERTION_DEASSERTION_TIME(USART_DEDeassertionTime));
mbed_official	76:aeb1df146756	1580
mbed_official	76:aeb1df146756	1581	/* Clear the DE deassertion time */
mbed_official	76:aeb1df146756	1582	USARTx->CR1 &= (uint32_t)~((uint32_t)USART_CR1_DEDT);
mbed_official	76:aeb1df146756	1583	/* Set the new value for the DE deassertion time */
mbed_official	76:aeb1df146756	1584	USARTx->CR1 \|=((uint32_t)USART_DEDeassertionTime << (uint32_t)0x10);
mbed_official	76:aeb1df146756	1585	}
mbed_official	76:aeb1df146756	1586
mbed_official	76:aeb1df146756	1587	/**
mbed_official	76:aeb1df146756	1588	* @}
mbed_official	76:aeb1df146756	1589	*/
mbed_official	76:aeb1df146756	1590
mbed_official	76:aeb1df146756	1591	/** @defgroup USART_Group11 DMA transfers management functions
mbed_official	76:aeb1df146756	1592	* @brief DMA transfers management functions
mbed_official	76:aeb1df146756	1593	*
mbed_official	76:aeb1df146756	1594	@verbatim
mbed_official	76:aeb1df146756	1595	===============================================================================
mbed_official	76:aeb1df146756	1596	##### DMA transfers management functions #####
mbed_official	76:aeb1df146756	1597	===============================================================================
mbed_official	76:aeb1df146756	1598	[..] This section provides two functions that can be used only in DMA mode.
mbed_official	76:aeb1df146756	1599	[..] In DMA Mode, the USART communication can be managed by 2 DMA Channel
mbed_official	76:aeb1df146756	1600	requests:
mbed_official	76:aeb1df146756	1601	(#) USART_DMAReq_Tx: specifies the Tx buffer DMA transfer request.
mbed_official	76:aeb1df146756	1602	(#) USART_DMAReq_Rx: specifies the Rx buffer DMA transfer request.
mbed_official	76:aeb1df146756	1603	[..] In this Mode it is advised to use the following function:
mbed_official	76:aeb1df146756	1604	(+) void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq,
mbed_official	76:aeb1df146756	1605	FunctionalState NewState).
mbed_official	76:aeb1df146756	1606	@endverbatim
mbed_official	76:aeb1df146756	1607	* @{
mbed_official	76:aeb1df146756	1608	*/
mbed_official	76:aeb1df146756	1609
mbed_official	76:aeb1df146756	1610	/**
mbed_official	76:aeb1df146756	1611	* @brief Enables or disables the USART's DMA interface.
mbed_official	76:aeb1df146756	1612	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1613	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1614	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1615	* @param USART_DMAReq: specifies the DMA request.
mbed_official	76:aeb1df146756	1616	* This parameter can be any combination of the following values:
mbed_official	76:aeb1df146756	1617	* @arg USART_DMAReq_Tx: USART DMA transmit request
mbed_official	76:aeb1df146756	1618	* @arg USART_DMAReq_Rx: USART DMA receive request
mbed_official	76:aeb1df146756	1619	* @param NewState: new state of the DMA Request sources.
mbed_official	76:aeb1df146756	1620	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	1621	* @retval None
mbed_official	76:aeb1df146756	1622	*/
mbed_official	76:aeb1df146756	1623	void USART_DMACmd(USART_TypeDef* USARTx, uint32_t USART_DMAReq, FunctionalState NewState)
mbed_official	76:aeb1df146756	1624	{
mbed_official	76:aeb1df146756	1625	/* Check the parameters */
mbed_official	76:aeb1df146756	1626	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1627	assert_param(IS_USART_DMAREQ(USART_DMAReq));
mbed_official	76:aeb1df146756	1628	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	1629
mbed_official	76:aeb1df146756	1630	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	1631	{
mbed_official	76:aeb1df146756	1632	/* Enable the DMA transfer for selected requests by setting the DMAT and/or
mbed_official	76:aeb1df146756	1633	DMAR bits in the USART CR3 register */
mbed_official	76:aeb1df146756	1634	USARTx->CR3 \|= USART_DMAReq;
mbed_official	76:aeb1df146756	1635	}
mbed_official	76:aeb1df146756	1636	else
mbed_official	76:aeb1df146756	1637	{
mbed_official	76:aeb1df146756	1638	/* Disable the DMA transfer for selected requests by clearing the DMAT and/or
mbed_official	76:aeb1df146756	1639	DMAR bits in the USART CR3 register */
mbed_official	76:aeb1df146756	1640	USARTx->CR3 &= (uint32_t)~USART_DMAReq;
mbed_official	76:aeb1df146756	1641	}
mbed_official	76:aeb1df146756	1642	}
mbed_official	76:aeb1df146756	1643
mbed_official	76:aeb1df146756	1644	/**
mbed_official	76:aeb1df146756	1645	* @brief Enables or disables the USART's DMA interface when reception error occurs.
mbed_official	76:aeb1df146756	1646	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1647	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1648	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1649	* @param USART_DMAOnError: specifies the DMA status in case of reception error.
mbed_official	76:aeb1df146756	1650	* This parameter can be any combination of the following values:
mbed_official	76:aeb1df146756	1651	* @arg USART_DMAOnError_Enable: DMA receive request enabled when the USART DMA
mbed_official	76:aeb1df146756	1652	* reception error is asserted.
mbed_official	76:aeb1df146756	1653	* @arg USART_DMAOnError_Disable: DMA receive request disabled when the USART DMA
mbed_official	76:aeb1df146756	1654	* reception error is asserted.
mbed_official	76:aeb1df146756	1655	* @retval None
mbed_official	76:aeb1df146756	1656	*/
mbed_official	76:aeb1df146756	1657	void USART_DMAReceptionErrorConfig(USART_TypeDef* USARTx, uint32_t USART_DMAOnError)
mbed_official	76:aeb1df146756	1658	{
mbed_official	76:aeb1df146756	1659	/* Check the parameters */
mbed_official	76:aeb1df146756	1660	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1661	assert_param(IS_USART_DMAONERROR(USART_DMAOnError));
mbed_official	76:aeb1df146756	1662
mbed_official	76:aeb1df146756	1663	/* Clear the DMA Reception error detection bit */
mbed_official	76:aeb1df146756	1664	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DDRE);
mbed_official	76:aeb1df146756	1665	/* Set the new value for the DMA Reception error detection bit */
mbed_official	76:aeb1df146756	1666	USARTx->CR3 \|= USART_DMAOnError;
mbed_official	76:aeb1df146756	1667	}
mbed_official	76:aeb1df146756	1668
mbed_official	76:aeb1df146756	1669	/**
mbed_official	76:aeb1df146756	1670	* @}
mbed_official	76:aeb1df146756	1671	*/
mbed_official	76:aeb1df146756	1672
mbed_official	76:aeb1df146756	1673	/** @defgroup USART_Group12 Interrupts and flags management functions
mbed_official	76:aeb1df146756	1674	* @brief Interrupts and flags management functions
mbed_official	76:aeb1df146756	1675	*
mbed_official	76:aeb1df146756	1676	@verbatim
mbed_official	76:aeb1df146756	1677	===============================================================================
mbed_official	76:aeb1df146756	1678	##### Interrupts and flags management functions #####
mbed_official	76:aeb1df146756	1679	===============================================================================
mbed_official	76:aeb1df146756	1680	[..] This subsection provides a set of functions allowing to configure the
mbed_official	76:aeb1df146756	1681	USART Interrupts sources, Requests and check or clear the flags or pending bits status.
mbed_official	76:aeb1df146756	1682	The user should identify which mode will be used in his application to
mbed_official	76:aeb1df146756	1683	manage the communication: Polling mode, Interrupt mode.
mbed_official	76:aeb1df146756	1684
mbed_official	76:aeb1df146756	1685	* Polling Mode *
mbed_official	76:aeb1df146756	1686	====================
mbed_official	76:aeb1df146756	1687	[..] In Polling Mode, the SPI communication can be managed by these flags:
mbed_official	76:aeb1df146756	1688	(#) USART_FLAG_REACK: to indicate the status of the Receive Enable
mbed_official	76:aeb1df146756	1689	acknowledge flag
mbed_official	76:aeb1df146756	1690	(#) USART_FLAG_TEACK: to indicate the status of the Transmit Enable
mbed_official	76:aeb1df146756	1691	acknowledge flag.
mbed_official	76:aeb1df146756	1692	(#) USART_FLAG_WU: to indicate the status of the Wake up flag.
mbed_official	76:aeb1df146756	1693	(#) USART_FLAG_RWU: to indicate the status of the Receive Wake up flag.
mbed_official	76:aeb1df146756	1694	(#) USART_FLAG_SBK: to indicate the status of the Send Break flag.
mbed_official	76:aeb1df146756	1695	(#) USART_FLAG_CM: to indicate the status of the Character match flag.
mbed_official	76:aeb1df146756	1696	(#) USART_FLAG_BUSY: to indicate the status of the Busy flag.
mbed_official	76:aeb1df146756	1697	(#) USART_FLAG_ABRF: to indicate the status of the Auto baud rate flag.
mbed_official	76:aeb1df146756	1698	(#) USART_FLAG_ABRE: to indicate the status of the Auto baud rate error flag.
mbed_official	76:aeb1df146756	1699	(#) USART_FLAG_EOB: to indicate the status of the End of block flag.
mbed_official	76:aeb1df146756	1700	(#) USART_FLAG_RTO: to indicate the status of the Receive time out flag.
mbed_official	76:aeb1df146756	1701	(#) USART_FLAG_nCTSS: to indicate the status of the Inverted nCTS input
mbed_official	76:aeb1df146756	1702	bit status.
mbed_official	76:aeb1df146756	1703	(#) USART_FLAG_TXE: to indicate the status of the transmit buffer register.
mbed_official	76:aeb1df146756	1704	(#) USART_FLAG_RXNE: to indicate the status of the receive buffer register.
mbed_official	76:aeb1df146756	1705	(#) USART_FLAG_TC: to indicate the status of the transmit operation.
mbed_official	76:aeb1df146756	1706	(#) USART_FLAG_IDLE: to indicate the status of the Idle Line.
mbed_official	76:aeb1df146756	1707	(#) USART_FLAG_CTS: to indicate the status of the nCTS input.
mbed_official	76:aeb1df146756	1708	(#) USART_FLAG_LBD: to indicate the status of the LIN break detection.
mbed_official	76:aeb1df146756	1709	(#) USART_FLAG_NE: to indicate if a noise error occur.
mbed_official	76:aeb1df146756	1710	(#) USART_FLAG_FE: to indicate if a frame error occur.
mbed_official	76:aeb1df146756	1711	(#) USART_FLAG_PE: to indicate if a parity error occur.
mbed_official	76:aeb1df146756	1712	(#) USART_FLAG_ORE: to indicate if an Overrun error occur.
mbed_official	76:aeb1df146756	1713	[..] In this Mode it is advised to use the following functions:
mbed_official	76:aeb1df146756	1714	(+) FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG).
mbed_official	76:aeb1df146756	1715	(+) void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG).
mbed_official	76:aeb1df146756	1716
mbed_official	76:aeb1df146756	1717	* Interrupt Mode *
mbed_official	76:aeb1df146756	1718	======================
mbed_official	76:aeb1df146756	1719	[..] In Interrupt Mode, the USART communication can be managed by 8 interrupt
mbed_official	76:aeb1df146756	1720	sources and 10 pending bits:
mbed_official	76:aeb1df146756	1721	(+) Pending Bits:
mbed_official	76:aeb1df146756	1722	(##) USART_IT_WU: to indicate the status of the Wake up interrupt.
mbed_official	76:aeb1df146756	1723	(##) USART_IT_CM: to indicate the status of Character match interrupt.
mbed_official	76:aeb1df146756	1724	(##) USART_IT_EOB: to indicate the status of End of block interrupt.
mbed_official	76:aeb1df146756	1725	(##) USART_IT_RTO: to indicate the status of Receive time out interrupt.
mbed_official	76:aeb1df146756	1726	(##) USART_IT_CTS: to indicate the status of CTS change interrupt.
mbed_official	76:aeb1df146756	1727	(##) USART_IT_LBD: to indicate the status of LIN Break detection interrupt.
mbed_official	76:aeb1df146756	1728	(##) USART_IT_TC: to indicate the status of Transmission complete interrupt.
mbed_official	76:aeb1df146756	1729	(##) USART_IT_IDLE: to indicate the status of IDLE line detected interrupt.
mbed_official	76:aeb1df146756	1730	(##) USART_IT_ORE: to indicate the status of OverRun Error interrupt.
mbed_official	76:aeb1df146756	1731	(##) USART_IT_NE: to indicate the status of Noise Error interrupt.
mbed_official	76:aeb1df146756	1732	(##) USART_IT_FE: to indicate the status of Framing Error interrupt.
mbed_official	76:aeb1df146756	1733	(##) USART_IT_PE: to indicate the status of Parity Error interrupt.
mbed_official	76:aeb1df146756	1734
mbed_official	76:aeb1df146756	1735	(+) Interrupt Source:
mbed_official	76:aeb1df146756	1736	(##) USART_IT_WU: specifies the interrupt source for Wake up interrupt.
mbed_official	76:aeb1df146756	1737	(##) USART_IT_CM: specifies the interrupt source for Character match
mbed_official	76:aeb1df146756	1738	interrupt.
mbed_official	76:aeb1df146756	1739	(##) USART_IT_EOB: specifies the interrupt source for End of block
mbed_official	76:aeb1df146756	1740	interrupt.
mbed_official	76:aeb1df146756	1741	(##) USART_IT_RTO: specifies the interrupt source for Receive time-out
mbed_official	76:aeb1df146756	1742	interrupt.
mbed_official	76:aeb1df146756	1743	(##) USART_IT_CTS: specifies the interrupt source for CTS change interrupt.
mbed_official	76:aeb1df146756	1744	(##) USART_IT_LBD: specifies the interrupt source for LIN Break
mbed_official	76:aeb1df146756	1745	detection interrupt.
mbed_official	76:aeb1df146756	1746	(##) USART_IT_TXE: specifies the interrupt source for Tansmit Data
mbed_official	76:aeb1df146756	1747	Register empty interrupt.
mbed_official	76:aeb1df146756	1748	(##) USART_IT_TC: specifies the interrupt source for Transmission
mbed_official	76:aeb1df146756	1749	complete interrupt.
mbed_official	76:aeb1df146756	1750	(##) USART_IT_RXNE: specifies the interrupt source for Receive Data
mbed_official	76:aeb1df146756	1751	register not empty interrupt.
mbed_official	76:aeb1df146756	1752	(##) USART_IT_IDLE: specifies the interrupt source for Idle line
mbed_official	76:aeb1df146756	1753	detection interrupt.
mbed_official	76:aeb1df146756	1754	(##) USART_IT_PE: specifies the interrupt source for Parity Error interrupt.
mbed_official	76:aeb1df146756	1755	(##) USART_IT_ERR: specifies the interrupt source for Error interrupt
mbed_official	76:aeb1df146756	1756	(Frame error, noise error, overrun error)
mbed_official	76:aeb1df146756	1757	-@@- Some parameters are coded in order to use them as interrupt
mbed_official	76:aeb1df146756	1758	source or as pending bits.
mbed_official	76:aeb1df146756	1759	[..] In this Mode it is advised to use the following functions:
mbed_official	76:aeb1df146756	1760	(+) void USART_ITConfig(USART_TypeDef* USARTx, uint16_t USART_IT, FunctionalState NewState).
mbed_official	76:aeb1df146756	1761	(+) ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT).
mbed_official	76:aeb1df146756	1762	(+) void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT).
mbed_official	76:aeb1df146756	1763
mbed_official	76:aeb1df146756	1764	@endverbatim
mbed_official	76:aeb1df146756	1765	* @{
mbed_official	76:aeb1df146756	1766	*/
mbed_official	76:aeb1df146756	1767
mbed_official	76:aeb1df146756	1768	/**
mbed_official	76:aeb1df146756	1769	* @brief Enables or disables the specified USART interrupts.
mbed_official	76:aeb1df146756	1770	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1771	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1772	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1773	* @param USART_IT: specifies the USART interrupt sources to be enabled or disabled.
mbed_official	76:aeb1df146756	1774	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	1775	* @arg USART_IT_WU: Wake up interrupt, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1776	* @arg USART_IT_CM: Character match interrupt.
mbed_official	76:aeb1df146756	1777	* @arg USART_IT_EOB: End of block interrupt, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1778	* @arg USART_IT_RTO: Receive time out interrupt.
mbed_official	76:aeb1df146756	1779	* @arg USART_IT_CTS: CTS change interrupt.
mbed_official	76:aeb1df146756	1780	* @arg USART_IT_LBD: LIN Break detection interrupt, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1781	* @arg USART_IT_TXE: Tansmit Data Register empty interrupt.
mbed_official	76:aeb1df146756	1782	* @arg USART_IT_TC: Transmission complete interrupt.
mbed_official	76:aeb1df146756	1783	* @arg USART_IT_RXNE: Receive Data register not empty interrupt.
mbed_official	76:aeb1df146756	1784	* @arg USART_IT_IDLE: Idle line detection interrupt.
mbed_official	76:aeb1df146756	1785	* @arg USART_IT_PE: Parity Error interrupt.
mbed_official	76:aeb1df146756	1786	* @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error)
mbed_official	76:aeb1df146756	1787	* @param NewState: new state of the specified USARTx interrupts.
mbed_official	76:aeb1df146756	1788	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	1789	* @retval None
mbed_official	76:aeb1df146756	1790	*/
mbed_official	76:aeb1df146756	1791	void USART_ITConfig(USART_TypeDef* USARTx, uint32_t USART_IT, FunctionalState NewState)
mbed_official	76:aeb1df146756	1792	{
mbed_official	76:aeb1df146756	1793	uint32_t usartreg = 0, itpos = 0, itmask = 0;
mbed_official	76:aeb1df146756	1794	uint32_t usartxbase = 0;
mbed_official	76:aeb1df146756	1795	/* Check the parameters */
mbed_official	76:aeb1df146756	1796	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1797	assert_param(IS_USART_CONFIG_IT(USART_IT));
mbed_official	76:aeb1df146756	1798	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	1799
mbed_official	76:aeb1df146756	1800	usartxbase = (uint32_t)USARTx;
mbed_official	76:aeb1df146756	1801
mbed_official	76:aeb1df146756	1802	/* Get the USART register index */
mbed_official	76:aeb1df146756	1803	usartreg = (((uint16_t)USART_IT) >> 0x08);
mbed_official	76:aeb1df146756	1804
mbed_official	76:aeb1df146756	1805	/* Get the interrupt position */
mbed_official	76:aeb1df146756	1806	itpos = USART_IT & IT_MASK;
mbed_official	76:aeb1df146756	1807	itmask = (((uint32_t)0x01) << itpos);
mbed_official	76:aeb1df146756	1808
mbed_official	76:aeb1df146756	1809	if (usartreg == 0x02) /* The IT is in CR2 register */
mbed_official	76:aeb1df146756	1810	{
mbed_official	76:aeb1df146756	1811	usartxbase += 0x04;
mbed_official	76:aeb1df146756	1812	}
mbed_official	76:aeb1df146756	1813	else if (usartreg == 0x03) /* The IT is in CR3 register */
mbed_official	76:aeb1df146756	1814	{
mbed_official	76:aeb1df146756	1815	usartxbase += 0x08;
mbed_official	76:aeb1df146756	1816	}
mbed_official	76:aeb1df146756	1817	else /* The IT is in CR1 register */
mbed_official	76:aeb1df146756	1818	{
mbed_official	76:aeb1df146756	1819	}
mbed_official	76:aeb1df146756	1820	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	1821	{
mbed_official	76:aeb1df146756	1822	(__IO uint32_t)usartxbase \|= itmask;
mbed_official	76:aeb1df146756	1823	}
mbed_official	76:aeb1df146756	1824	else
mbed_official	76:aeb1df146756	1825	{
mbed_official	76:aeb1df146756	1826	(__IO uint32_t)usartxbase &= ~itmask;
mbed_official	76:aeb1df146756	1827	}
mbed_official	76:aeb1df146756	1828	}
mbed_official	76:aeb1df146756	1829
mbed_official	76:aeb1df146756	1830	/**
mbed_official	76:aeb1df146756	1831	* @brief Enables the specified USART's Request.
mbed_official	76:aeb1df146756	1832	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1833	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1834	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1835	* @param USART_Request: specifies the USART request.
mbed_official	76:aeb1df146756	1836	* This parameter can be any combination of the following values:
mbed_official	76:aeb1df146756	1837	* @arg USART_Request_TXFRQ: Transmit data flush ReQuest
mbed_official	76:aeb1df146756	1838	* @arg USART_Request_RXFRQ: Receive data flush ReQuest
mbed_official	76:aeb1df146756	1839	* @arg USART_Request_MMRQ: Mute Mode ReQuest
mbed_official	76:aeb1df146756	1840	* @arg USART_Request_SBKRQ: Send Break ReQuest
mbed_official	76:aeb1df146756	1841	* @arg USART_Request_ABRRQ: Auto Baud Rate ReQuest
mbed_official	76:aeb1df146756	1842	* @param NewState: new state of the DMA interface when reception error occurs.
mbed_official	76:aeb1df146756	1843	* This parameter can be: ENABLE or DISABLE.
mbed_official	76:aeb1df146756	1844	* @retval None
mbed_official	76:aeb1df146756	1845	*/
mbed_official	76:aeb1df146756	1846	void USART_RequestCmd(USART_TypeDef* USARTx, uint32_t USART_Request, FunctionalState NewState)
mbed_official	76:aeb1df146756	1847	{
mbed_official	76:aeb1df146756	1848	/* Check the parameters */
mbed_official	76:aeb1df146756	1849	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1850	assert_param(IS_USART_REQUEST(USART_Request));
mbed_official	76:aeb1df146756	1851	assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official	76:aeb1df146756	1852
mbed_official	76:aeb1df146756	1853	if (NewState != DISABLE)
mbed_official	76:aeb1df146756	1854	{
mbed_official	76:aeb1df146756	1855	/* Enable the USART ReQuest by setting the dedicated request bit in the RQR
mbed_official	76:aeb1df146756	1856	register.*/
mbed_official	76:aeb1df146756	1857	USARTx->RQR \|= USART_Request;
mbed_official	76:aeb1df146756	1858	}
mbed_official	76:aeb1df146756	1859	else
mbed_official	76:aeb1df146756	1860	{
mbed_official	76:aeb1df146756	1861	/* Disable the USART ReQuest by clearing the dedicated request bit in the RQR
mbed_official	76:aeb1df146756	1862	register.*/
mbed_official	76:aeb1df146756	1863	USARTx->RQR &= (uint32_t)~USART_Request;
mbed_official	76:aeb1df146756	1864	}
mbed_official	76:aeb1df146756	1865	}
mbed_official	76:aeb1df146756	1866
mbed_official	76:aeb1df146756	1867	/**
mbed_official	76:aeb1df146756	1868	* @brief Enables or disables the USART's Overrun detection.
mbed_official	76:aeb1df146756	1869	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1870	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1871	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1872	* @param USART_OVRDetection: specifies the OVR detection status in case of OVR error.
mbed_official	76:aeb1df146756	1873	* This parameter can be any combination of the following values:
mbed_official	76:aeb1df146756	1874	* @arg USART_OVRDetection_Enable: OVR error detection enabled when
mbed_official	76:aeb1df146756	1875	* the USART OVR error is asserted.
mbed_official	76:aeb1df146756	1876	* @arg USART_OVRDetection_Disable: OVR error detection disabled when
mbed_official	76:aeb1df146756	1877	* the USART OVR error is asserted.
mbed_official	76:aeb1df146756	1878	* @retval None
mbed_official	76:aeb1df146756	1879	*/
mbed_official	76:aeb1df146756	1880	void USART_OverrunDetectionConfig(USART_TypeDef* USARTx, uint32_t USART_OVRDetection)
mbed_official	76:aeb1df146756	1881	{
mbed_official	76:aeb1df146756	1882	/* Check the parameters */
mbed_official	76:aeb1df146756	1883	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1884	assert_param(IS_USART_OVRDETECTION(USART_OVRDetection));
mbed_official	76:aeb1df146756	1885
mbed_official	76:aeb1df146756	1886	/* Clear the OVR detection bit */
mbed_official	76:aeb1df146756	1887	USARTx->CR3 &= (uint32_t)~((uint32_t)USART_CR3_OVRDIS);
mbed_official	76:aeb1df146756	1888	/* Set the new value for the OVR detection bit */
mbed_official	76:aeb1df146756	1889	USARTx->CR3 \|= USART_OVRDetection;
mbed_official	76:aeb1df146756	1890	}
mbed_official	76:aeb1df146756	1891
mbed_official	76:aeb1df146756	1892	/**
mbed_official	76:aeb1df146756	1893	* @brief Checks whether the specified USART flag is set or not.
mbed_official	76:aeb1df146756	1894	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1895	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1896	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1897	* @param USART_FLAG: specifies the flag to check.
mbed_official	76:aeb1df146756	1898	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	1899	* @arg USART_FLAG_REACK: Receive Enable acknowledge flag.
mbed_official	76:aeb1df146756	1900	* @arg USART_FLAG_TEACK: Transmit Enable acknowledge flag.
mbed_official	76:aeb1df146756	1901	* @arg USART_FLAG_WU: Wake up flag, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1902	* @arg USART_FLAG_RWU: Receive Wake up flag, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1903	* @arg USART_FLAG_SBK: Send Break flag.
mbed_official	76:aeb1df146756	1904	* @arg USART_FLAG_CM: Character match flag.
mbed_official	76:aeb1df146756	1905	* @arg USART_FLAG_BUSY: Busy flag.
mbed_official	76:aeb1df146756	1906	* @arg USART_FLAG_ABRF: Auto baud rate flag.
mbed_official	76:aeb1df146756	1907	* @arg USART_FLAG_ABRE: Auto baud rate error flag.
mbed_official	76:aeb1df146756	1908	* @arg USART_FLAG_EOB: End of block flag, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1909	* @arg USART_FLAG_RTO: Receive time out flag.
mbed_official	76:aeb1df146756	1910	* @arg USART_FLAG_nCTSS: Inverted nCTS input bit status.
mbed_official	76:aeb1df146756	1911	* @arg USART_FLAG_CTS: CTS Change flag.
mbed_official	76:aeb1df146756	1912	* @arg USART_FLAG_LBD: LIN Break detection flag, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1913	* @arg USART_FLAG_TXE: Transmit data register empty flag.
mbed_official	76:aeb1df146756	1914	* @arg USART_FLAG_TC: Transmission Complete flag.
mbed_official	76:aeb1df146756	1915	* @arg USART_FLAG_RXNE: Receive data register not empty flag.
mbed_official	76:aeb1df146756	1916	* @arg USART_FLAG_IDLE: Idle Line detection flag.
mbed_official	76:aeb1df146756	1917	* @arg USART_FLAG_ORE: OverRun Error flag.
mbed_official	76:aeb1df146756	1918	* @arg USART_FLAG_NE: Noise Error flag.
mbed_official	76:aeb1df146756	1919	* @arg USART_FLAG_FE: Framing Error flag.
mbed_official	76:aeb1df146756	1920	* @arg USART_FLAG_PE: Parity Error flag.
mbed_official	76:aeb1df146756	1921	* @retval The new state of USART_FLAG (SET or RESET).
mbed_official	76:aeb1df146756	1922	*/
mbed_official	76:aeb1df146756	1923	FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint32_t USART_FLAG)
mbed_official	76:aeb1df146756	1924	{
mbed_official	76:aeb1df146756	1925	FlagStatus bitstatus = RESET;
mbed_official	76:aeb1df146756	1926	/* Check the parameters */
mbed_official	76:aeb1df146756	1927	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1928	assert_param(IS_USART_FLAG(USART_FLAG));
mbed_official	76:aeb1df146756	1929
mbed_official	76:aeb1df146756	1930	if ((USARTx->ISR & USART_FLAG) != (uint16_t)RESET)
mbed_official	76:aeb1df146756	1931	{
mbed_official	76:aeb1df146756	1932	bitstatus = SET;
mbed_official	76:aeb1df146756	1933	}
mbed_official	76:aeb1df146756	1934	else
mbed_official	76:aeb1df146756	1935	{
mbed_official	76:aeb1df146756	1936	bitstatus = RESET;
mbed_official	76:aeb1df146756	1937	}
mbed_official	76:aeb1df146756	1938	return bitstatus;
mbed_official	76:aeb1df146756	1939	}
mbed_official	76:aeb1df146756	1940
mbed_official	76:aeb1df146756	1941	/**
mbed_official	76:aeb1df146756	1942	* @brief Clears the USARTx's pending flags.
mbed_official	76:aeb1df146756	1943	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1944	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1945	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1946	* @param USART_FLAG: specifies the flag to clear.
mbed_official	76:aeb1df146756	1947	* This parameter can be any combination of the following values:
mbed_official	76:aeb1df146756	1948	* @arg USART_FLAG_WU: Wake up flag, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1949	* @arg USART_FLAG_CM: Character match flag.
mbed_official	76:aeb1df146756	1950	* @arg USART_FLAG_EOB: End of block flag, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1951	* @arg USART_FLAG_RTO: Receive time out flag.
mbed_official	76:aeb1df146756	1952	* @arg USART_FLAG_CTS: CTS Change flag.
mbed_official	76:aeb1df146756	1953	* @arg USART_FLAG_LBD: LIN Break detection flag, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1954	* @arg USART_FLAG_TC: Transmission Complete flag.
mbed_official	76:aeb1df146756	1955	* @arg USART_FLAG_IDLE: IDLE line detected flag.
mbed_official	76:aeb1df146756	1956	* @arg USART_FLAG_ORE: OverRun Error flag.
mbed_official	76:aeb1df146756	1957	* @arg USART_FLAG_NE: Noise Error flag.
mbed_official	76:aeb1df146756	1958	* @arg USART_FLAG_FE: Framing Error flag.
mbed_official	76:aeb1df146756	1959	* @arg USART_FLAG_PE: Parity Errorflag.
mbed_official	76:aeb1df146756	1960	*
mbed_official	76:aeb1df146756	1961	* @note RXNE pending bit is cleared by a read to the USART_RDR register
mbed_official	76:aeb1df146756	1962	* (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register
mbed_official	76:aeb1df146756	1963	* USART_RQR (USART_RequestCmd()).
mbed_official	76:aeb1df146756	1964	* @note TC flag can be also cleared by software sequence: a read operation
mbed_official	76:aeb1df146756	1965	* to USART_SR register (USART_GetFlagStatus()) followed by a write
mbed_official	76:aeb1df146756	1966	* operation to USART_TDR register (USART_SendData()).
mbed_official	76:aeb1df146756	1967	* @note TXE flag is cleared by a write to the USART_TDR register (USART_SendData())
mbed_official	76:aeb1df146756	1968	* or by writing 1 to the TXFRQ in the register USART_RQR (USART_RequestCmd()).
mbed_official	76:aeb1df146756	1969	* @note SBKF flag is cleared by 1 to the SBKRQ in the register USART_RQR
mbed_official	76:aeb1df146756	1970	* (USART_RequestCmd()).
mbed_official	76:aeb1df146756	1971	* @retval None
mbed_official	76:aeb1df146756	1972	*/
mbed_official	76:aeb1df146756	1973	void USART_ClearFlag(USART_TypeDef* USARTx, uint32_t USART_FLAG)
mbed_official	76:aeb1df146756	1974	{
mbed_official	76:aeb1df146756	1975	/* Check the parameters */
mbed_official	76:aeb1df146756	1976	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	1977	assert_param(IS_USART_CLEAR_FLAG(USART_FLAG));
mbed_official	76:aeb1df146756	1978
mbed_official	76:aeb1df146756	1979	USARTx->ICR = USART_FLAG;
mbed_official	76:aeb1df146756	1980	}
mbed_official	76:aeb1df146756	1981
mbed_official	76:aeb1df146756	1982	/**
mbed_official	76:aeb1df146756	1983	* @brief Checks whether the specified USART interrupt has occurred or not.
mbed_official	76:aeb1df146756	1984	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	1985	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	1986	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	1987	* @param USART_IT: specifies the USART interrupt source to check.
mbed_official	76:aeb1df146756	1988	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	1989	* @arg USART_IT_WU: Wake up interrupt, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1990	* @arg USART_IT_CM: Character match interrupt.
mbed_official	76:aeb1df146756	1991	* @arg USART_IT_EOB: End of block interrupt, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1992	* @arg USART_IT_RTO: Receive time out interrupt.
mbed_official	76:aeb1df146756	1993	* @arg USART_IT_CTS: CTS change interrupt.
mbed_official	76:aeb1df146756	1994	* @arg USART_IT_LBD: LIN Break detection interrupt, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	1995	* @arg USART_IT_TXE: Tansmit Data Register empty interrupt.
mbed_official	76:aeb1df146756	1996	* @arg USART_IT_TC: Transmission complete interrupt.
mbed_official	76:aeb1df146756	1997	* @arg USART_IT_RXNE: Receive Data register not empty interrupt.
mbed_official	76:aeb1df146756	1998	* @arg USART_IT_IDLE: Idle line detection interrupt.
mbed_official	76:aeb1df146756	1999	* @arg USART_IT_ORE: OverRun Error interrupt.
mbed_official	76:aeb1df146756	2000	* @arg USART_IT_NE: Noise Error interrupt.
mbed_official	76:aeb1df146756	2001	* @arg USART_IT_FE: Framing Error interrupt.
mbed_official	76:aeb1df146756	2002	* @arg USART_IT_PE: Parity Error interrupt.
mbed_official	76:aeb1df146756	2003	* @retval The new state of USART_IT (SET or RESET).
mbed_official	76:aeb1df146756	2004	*/
mbed_official	76:aeb1df146756	2005	ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint32_t USART_IT)
mbed_official	76:aeb1df146756	2006	{
mbed_official	76:aeb1df146756	2007	uint32_t bitpos = 0, itmask = 0, usartreg = 0;
mbed_official	76:aeb1df146756	2008	ITStatus bitstatus = RESET;
mbed_official	76:aeb1df146756	2009	/* Check the parameters */
mbed_official	76:aeb1df146756	2010	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	2011	assert_param(IS_USART_GET_IT(USART_IT));
mbed_official	76:aeb1df146756	2012
mbed_official	76:aeb1df146756	2013	/* Get the USART register index */
mbed_official	76:aeb1df146756	2014	usartreg = (((uint16_t)USART_IT) >> 0x08);
mbed_official	76:aeb1df146756	2015	/* Get the interrupt position */
mbed_official	76:aeb1df146756	2016	itmask = USART_IT & IT_MASK;
mbed_official	76:aeb1df146756	2017	itmask = (uint32_t)0x01 << itmask;
mbed_official	76:aeb1df146756	2018
mbed_official	76:aeb1df146756	2019	if (usartreg == 0x01) /* The IT is in CR1 register */
mbed_official	76:aeb1df146756	2020	{
mbed_official	76:aeb1df146756	2021	itmask &= USARTx->CR1;
mbed_official	76:aeb1df146756	2022	}
mbed_official	76:aeb1df146756	2023	else if (usartreg == 0x02) /* The IT is in CR2 register */
mbed_official	76:aeb1df146756	2024	{
mbed_official	76:aeb1df146756	2025	itmask &= USARTx->CR2;
mbed_official	76:aeb1df146756	2026	}
mbed_official	76:aeb1df146756	2027	else /* The IT is in CR3 register */
mbed_official	76:aeb1df146756	2028	{
mbed_official	76:aeb1df146756	2029	itmask &= USARTx->CR3;
mbed_official	76:aeb1df146756	2030	}
mbed_official	76:aeb1df146756	2031
mbed_official	76:aeb1df146756	2032	bitpos = USART_IT >> 0x10;
mbed_official	76:aeb1df146756	2033	bitpos = (uint32_t)0x01 << bitpos;
mbed_official	76:aeb1df146756	2034	bitpos &= USARTx->ISR;
mbed_official	76:aeb1df146756	2035	if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET))
mbed_official	76:aeb1df146756	2036	{
mbed_official	76:aeb1df146756	2037	bitstatus = SET;
mbed_official	76:aeb1df146756	2038	}
mbed_official	76:aeb1df146756	2039	else
mbed_official	76:aeb1df146756	2040	{
mbed_official	76:aeb1df146756	2041	bitstatus = RESET;
mbed_official	76:aeb1df146756	2042	}
mbed_official	76:aeb1df146756	2043
mbed_official	76:aeb1df146756	2044	return bitstatus;
mbed_official	76:aeb1df146756	2045	}
mbed_official	76:aeb1df146756	2046
mbed_official	76:aeb1df146756	2047	/**
mbed_official	76:aeb1df146756	2048	* @brief Clears the USARTx's interrupt pending bits.
mbed_official	76:aeb1df146756	2049	* @param USARTx: where x can be 1, 2, 3 or 4 to select the USART peripheral.
mbed_official	76:aeb1df146756	2050	* @note USART3 and USART4 are available only for STM32F072 devices.
mbed_official	76:aeb1df146756	2051	* @note USART2 is not available for STM32F031 devices.
mbed_official	76:aeb1df146756	2052	* @param USART_IT: specifies the interrupt pending bit to clear.
mbed_official	76:aeb1df146756	2053	* This parameter can be one of the following values:
mbed_official	76:aeb1df146756	2054	* @arg USART_IT_WU: Wake up interrupt, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	2055	* @arg USART_IT_CM: Character match interrupt.
mbed_official	76:aeb1df146756	2056	* @arg USART_IT_EOB: End of block interrupt, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	2057	* @arg USART_IT_RTO: Receive time out interrupt.
mbed_official	76:aeb1df146756	2058	* @arg USART_IT_CTS: CTS change interrupt.
mbed_official	76:aeb1df146756	2059	* @arg USART_IT_LBD: LIN Break detection interrupt, not available for STM32F030 devices.
mbed_official	76:aeb1df146756	2060	* @arg USART_IT_TC: Transmission complete interrupt.
mbed_official	76:aeb1df146756	2061	* @arg USART_IT_IDLE: IDLE line detected interrupt.
mbed_official	76:aeb1df146756	2062	* @arg USART_IT_ORE: OverRun Error interrupt.
mbed_official	76:aeb1df146756	2063	* @arg USART_IT_NE: Noise Error interrupt.
mbed_official	76:aeb1df146756	2064	* @arg USART_IT_FE: Framing Error interrupt.
mbed_official	76:aeb1df146756	2065	* @arg USART_IT_PE: Parity Error interrupt.
mbed_official	76:aeb1df146756	2066	*
mbed_official	76:aeb1df146756	2067	* @note RXNE pending bit is cleared by a read to the USART_RDR register
mbed_official	76:aeb1df146756	2068	* (USART_ReceiveData()) or by writing 1 to the RXFRQ in the register
mbed_official	76:aeb1df146756	2069	* USART_RQR (USART_RequestCmd()).
mbed_official	76:aeb1df146756	2070	* @note TC pending bit can be also cleared by software sequence: a read
mbed_official	76:aeb1df146756	2071	* operation to USART_SR register (USART_GetITStatus()) followed by
mbed_official	76:aeb1df146756	2072	* a write operation to USART_TDR register (USART_SendData()).
mbed_official	76:aeb1df146756	2073	* @note TXE pending bit is cleared by a write to the USART_TDR register
mbed_official	76:aeb1df146756	2074	* (USART_SendData()) or by writing 1 to the TXFRQ in the register
mbed_official	76:aeb1df146756	2075	* USART_RQR (USART_RequestCmd()).
mbed_official	76:aeb1df146756	2076	* @retval None
mbed_official	76:aeb1df146756	2077	*/
mbed_official	76:aeb1df146756	2078	void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint32_t USART_IT)
mbed_official	76:aeb1df146756	2079	{
mbed_official	76:aeb1df146756	2080	uint32_t bitpos = 0, itmask = 0;
mbed_official	76:aeb1df146756	2081	/* Check the parameters */
mbed_official	76:aeb1df146756	2082	assert_param(IS_USART_ALL_PERIPH(USARTx));
mbed_official	76:aeb1df146756	2083	assert_param(IS_USART_CLEAR_IT(USART_IT));
mbed_official	76:aeb1df146756	2084
mbed_official	76:aeb1df146756	2085	bitpos = USART_IT >> 0x10;
mbed_official	76:aeb1df146756	2086	itmask = ((uint32_t)0x01 << (uint32_t)bitpos);
mbed_official	76:aeb1df146756	2087	USARTx->ICR = (uint32_t)itmask;
mbed_official	76:aeb1df146756	2088	}
mbed_official	76:aeb1df146756	2089
mbed_official	76:aeb1df146756	2090	/**
mbed_official	76:aeb1df146756	2091	* @}
mbed_official	76:aeb1df146756	2092	*/
mbed_official	76:aeb1df146756	2093
mbed_official	76:aeb1df146756	2094	/**
mbed_official	76:aeb1df146756	2095	* @}
mbed_official	76:aeb1df146756	2096	*/
mbed_official	76:aeb1df146756	2097
mbed_official	76:aeb1df146756	2098	/**
mbed_official	76:aeb1df146756	2099	* @}
mbed_official	76:aeb1df146756	2100	*/
mbed_official	76:aeb1df146756	2101
mbed_official	76:aeb1df146756	2102	/**
mbed_official	76:aeb1df146756	2103	* @}
mbed_official	76:aeb1df146756	2104	*/
mbed_official	76:aeb1df146756	2105
mbed_official	76:aeb1df146756	2106	/********************** (C) COPYRIGHT STMicroelectronics *END OF FILE**/

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Type:	Library
Created:	29 Jun 2014
Imports:	3
Forks:	0
Commits:	135
Dependents:	1
Dependencies:	0
Followers:	3

targets/cmsis/TARGET_STM/TARGET_NUCLEO_F030R8/stm32f0xx_usart.c@106:ced8cbb51063, 2014-02-26 (annotated)

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