Joris Aerts
mbed library sources
Fork of
mbed-src
by 
mbed official
Diff: targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_usart.c
- Revision:
- 610:813dcc80987e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_usart.c Fri Aug 14 13:15:17 2015 +0100
@@ -0,0 +1,1817 @@
+/**
+ ******************************************************************************
+ * @file stm32l4xx_hal_usart.c
+ * @author MCD Application Team
+ * @version V1.0.0
+ * @date 26-June-2015
+ * @brief USART HAL module driver.
+ * This file provides firmware functions to manage the following
+ * functionalities of the Universal Synchronous/Asynchronous Receiver Transmitter
+ * Peripheral (USART).
+ * + Initialization and de-initialization functions
+ * + IO operation functions
+ * + Peripheral Control functions
+ * + Peripheral State and Error functions
+ *
+ @verbatim
+ ===============================================================================
+ ##### How to use this driver #####
+ ===============================================================================
+ [..]
+ The USART HAL driver can be used as follows:
+
+ (#) Declare a USART_HandleTypeDef handle structure (eg. USART_HandleTypeDef husart).
+ (#) Initialize the USART low level resources by implementing the HAL_USART_MspInit() API:
+ (++) Enable the USARTx interface clock.
+ (++) USART pins configuration:
+ (+++) Enable the clock for the USART GPIOs.
+ (+++) Configure these USART pins as alternate function pull-up.
+ (++) NVIC configuration if you need to use interrupt process (HAL_USART_Transmit_IT(),
+ HAL_USART_Receive_IT() and HAL_USART_TransmitReceive_IT() APIs):
+ (+++) Configure the USARTx interrupt priority.
+ (+++) Enable the NVIC USART IRQ handle.
+ (++) USART interrupts handling:
+ -@@- The specific USART interrupts (Transmission complete interrupt,
+ RXNE interrupt and Error Interrupts) will be managed using the macros
+ __HAL_USART_ENABLE_IT() and __HAL_USART_DISABLE_IT() inside the transmit and receive process.
+ (++) DMA Configuration if you need to use DMA process (HAL_USART_Transmit_DMA()
+ HAL_USART_Receive_DMA() and HAL_USART_TransmitReceive_DMA() APIs):
+ (+++) Declare a DMA handle structure for the Tx/Rx channel.
+ (+++) Enable the DMAx interface clock.
+ (+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.
+ (+++) Configure the DMA Tx/Rx channel.
+ (+++) Associate the initialized DMA handle to the USART DMA Tx/Rx handle.
+ (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the DMA Tx/Rx channel.
+
+ (#) Program the Baud Rate, Word Length, Stop Bit, Parity, Hardware
+ flow control and Mode (Receiver/Transmitter) in the husart handle Init structure.
+
+ (#) Initialize the USART registers by calling the HAL_USART_Init() API:
+ (++) This API configures also the low level Hardware GPIO, CLOCK, CORTEX...etc)
+ by calling the customized HAL_USART_MspInit(&husart) API.
+
+ [..]
+ (@) To configure and enable/disable the USART to wake up the MCU from stop mode, resort to UART API's
+ HAL_UARTEx_StopModeWakeUpSourceConfig(), HAL_UARTEx_EnableStopMode() and
+ HAL_UARTEx_DisableStopMode() in casting the USART handle to UART type UART_HandleTypeDef.
+
+ @endverbatim
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l4xx_hal.h"
+
+/** @addtogroup STM32L4xx_HAL_Driver
+ * @{
+ */
+
+/** @defgroup USART USART
+ * @brief HAL USART Synchronous module driver
+ * @{
+ */
+
+#ifdef HAL_USART_MODULE_ENABLED
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/** @defgroup USART_Private_Constants USART Private Constants
+ * @{
+ */
+#define USART_DUMMY_DATA ((uint16_t) 0xFFFF) /*!< USART transmitted dummy data */
+#define USART_TEACK_REACK_TIMEOUT ((uint32_t) 1000) /*!< USART TX or RX enable acknowledge time-out value */
+#define USART_CR1_FIELDS ((uint32_t)(USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | \
+ USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8)) /*!< USART CR1 fields of parameters set by USART_SetConfig API */
+#define USART_CR2_FIELDS ((uint32_t)(USART_CR2_CPHA | USART_CR2_CPOL | \
+ USART_CR2_CLKEN | USART_CR2_LBCL | USART_CR2_STOP)) /*!< USART CR2 fields of parameters set by USART_SetConfig API */
+/**
+ * @}
+ */
+
+/* Private macros ------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/** @addtogroup USART_Private_Functions
+ * @{
+ */
+static void USART_DMATransmitCplt(DMA_HandleTypeDef *hdma);
+static void USART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
+static void USART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
+static void USART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
+static void USART_DMAError(DMA_HandleTypeDef *hdma);
+static HAL_StatusTypeDef USART_WaitOnFlagUntilTimeout(USART_HandleTypeDef *husart, uint32_t Flag, FlagStatus Status, uint32_t Timeout);
+static HAL_StatusTypeDef USART_SetConfig(USART_HandleTypeDef *husart);
+static HAL_StatusTypeDef USART_CheckIdleState(USART_HandleTypeDef *husart);
+static HAL_StatusTypeDef USART_Transmit_IT(USART_HandleTypeDef *husart);
+static HAL_StatusTypeDef USART_EndTransmit_IT(USART_HandleTypeDef *husart);
+static HAL_StatusTypeDef USART_Receive_IT(USART_HandleTypeDef *husart);
+static HAL_StatusTypeDef USART_TransmitReceive_IT(USART_HandleTypeDef *husart);
+/**
+ * @}
+ */
+
+/* Exported functions --------------------------------------------------------*/
+
+/** @defgroup USART_Exported_Functions USART Exported Functions
+ * @{
+ */
+
+/** @defgroup USART_Exported_Functions_Group1 Initialization and de-initialization functions
+ * @brief Initialization and Configuration functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Initialization and Configuration functions #####
+ ===============================================================================
+ [..]
+ This subsection provides a set of functions allowing to initialize the USART
+ in asynchronous and in synchronous modes.
+ (+) For the asynchronous mode only these parameters can be configured:
+ (++) Baud Rate
+ (++) Word Length
+ (++) Stop Bit
+ (++) Parity: If the parity is enabled, then the MSB bit of the data written
+ in the data register is transmitted but is changed by the parity bit.
+ Depending on the frame length defined by the M1 and M0 bits (7-bit,
+ 8-bit or 9-bit), the possible USART frame formats are as listed in the
+ following table:
+
+ (+++) Table 1. USART frame format.
+ (+++) +-----------------------------------------------------------------------+
+ (+++) | M1 bit | M0 bit | PCE bit | USART frame |
+ (+++) |---------|---------|-----------|---------------------------------------|
+ (+++) | 0 | 0 | 0 | | SB | 8 bit data | STB | |
+ (+++) |---------|---------|-----------|---------------------------------------|
+ (+++) | 0 | 0 | 1 | | SB | 7 bit data | PB | STB | |
+ (+++) |---------|---------|-----------|---------------------------------------|
+ (+++) | 0 | 1 | 0 | | SB | 9 bit data | STB | |
+ (+++) |---------|---------|-----------|---------------------------------------|
+ (+++) | 0 | 1 | 1 | | SB | 8 bit data | PB | STB | |
+ (+++) |---------|---------|-----------|---------------------------------------|
+ (+++) | 1 | 0 | 0 | | SB | 7 bit data | STB | |
+ (+++) |---------|---------|-----------|---------------------------------------|
+ (+++) | 1 | 0 | 1 | | SB | 6 bit data | PB | STB | |
+ (+++) +-----------------------------------------------------------------------+
+ (++) USART polarity
+ (++) USART phase
+ (++) USART LastBit
+ (++) Receiver/transmitter modes
+
+ [..]
+ The HAL_USART_Init() function follows the USART synchronous configuration
+ procedure (details for the procedure are available in reference manual).
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Initializes the USART mode according to the specified
+ * parameters in the USART_InitTypeDef and initialize the associated handle.
+ * @param husart: USART handle.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Init(USART_HandleTypeDef *husart)
+{
+ /* Check the USART handle allocation */
+ if(husart == NULL)
+ {
+ return HAL_ERROR;
+ }
+
+ /* Check the parameters */
+ assert_param(IS_USART_INSTANCE(husart->Instance));
+
+ if(husart->State == HAL_USART_STATE_RESET)
+ {
+ /* Allocate lock resource and initialize it */
+ husart->Lock = HAL_UNLOCKED;
+
+ /* Init the low level hardware : GPIO, CLOCK */
+ HAL_USART_MspInit(husart);
+ }
+
+ husart->State = HAL_USART_STATE_BUSY;
+
+ /* Disable the Peripheral */
+ __HAL_USART_DISABLE(husart);
+
+ /* Set the Usart Communication parameters */
+ if (USART_SetConfig(husart) == HAL_ERROR)
+ {
+ return HAL_ERROR;
+ }
+
+ /* In Synchronous mode, the following bits must be kept cleared:
+ - LINEN bit in the USART_CR2 register
+ - HDSEL, SCEN and IREN bits in the USART_CR3 register.*/
+ husart->Instance->CR2 &= ~USART_CR2_LINEN;
+ husart->Instance->CR3 &= ~(USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN);
+
+ /* Enable the Peripheral */
+ __HAL_USART_ENABLE(husart);
+
+ /* TEACK and/or REACK to check before moving husart->State to Ready */
+ return (USART_CheckIdleState(husart));
+}
+
+/**
+ * @brief DeInitialize the USART peripheral.
+ * @param husart: USART handle.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_DeInit(USART_HandleTypeDef *husart)
+{
+ /* Check the USART handle allocation */
+ if(husart == NULL)
+ {
+ return HAL_ERROR;
+ }
+
+ /* Check the parameters */
+ assert_param(IS_USART_INSTANCE(husart->Instance));
+
+ husart->State = HAL_USART_STATE_BUSY;
+
+ husart->Instance->CR1 = 0x0;
+ husart->Instance->CR2 = 0x0;
+ husart->Instance->CR3 = 0x0;
+
+ /* DeInit the low level hardware */
+ HAL_USART_MspDeInit(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_RESET;
+
+ /* Process Unlock */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Initialize the USART MSP.
+ * @param husart: USART handle.
+ * @retval None
+ */
+ __weak void HAL_USART_MspInit(USART_HandleTypeDef *husart)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_MspInit can be implemented in the user file
+ */
+}
+
+/**
+ * @brief DeInitialize the USART MSP.
+ * @param husart: USART handle.
+ * @retval None
+ */
+ __weak void HAL_USART_MspDeInit(USART_HandleTypeDef *husart)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_MspDeInit can be implemented in the user file
+ */
+}
+
+/**
+ * @}
+ */
+
+/** @defgroup USART_Exported_Functions_Group2 IO operation functions
+ * @brief USART Transmit and Receive functions
+ *
+@verbatim
+ ===============================================================================
+ ##### IO operation functions #####
+ ===============================================================================
+ [..] This subsection provides a set of functions allowing to manage the USART synchronous
+ data transfers.
+
+ [..] The USART supports master mode only: it cannot receive or send data related to an input
+ clock (SCLK is always an output).
+
+ (#) There are two modes of transfer:
+ (++) Blocking mode: The communication is performed in polling mode.
+ The HAL status of all data processing is returned by the same function
+ after finishing transfer.
+ (++) No-Blocking mode: The communication is performed using Interrupts
+ or DMA, These API's return the HAL status.
+ The end of the data processing will be indicated through the
+ dedicated USART IRQ when using Interrupt mode or the DMA IRQ when
+ using DMA mode.
+ The HAL_USART_TxCpltCallback(), HAL_USART_RxCpltCallback() and HAL_USART_TxRxCpltCallback() user callbacks
+ will be executed respectively at the end of the transmit or Receive process
+ The HAL_USART_ErrorCallback()user callback will be executed when a communication error is detected
+
+ (#) Blocking mode API's are :
+ (++) HAL_USART_Transmit()in simplex mode
+ (++) HAL_USART_Receive() in full duplex receive only
+ (++) HAL_USART_TransmitReceive() in full duplex mode
+
+ (#) Non-Blocking mode API's with Interrupt are :
+ (++) HAL_USART_Transmit_IT()in simplex mode
+ (++) HAL_USART_Receive_IT() in full duplex receive only
+ (++) HAL_USART_TransmitReceive_IT()in full duplex mode
+ (++) HAL_USART_IRQHandler()
+
+ (#) No-Blocking mode API's with DMA are :
+ (++) HAL_USART_Transmit_DMA()in simplex mode
+ (++) HAL_USART_Receive_DMA() in full duplex receive only
+ (++) HAL_USART_TransmitReceive_DMA() in full duplex mode
+ (++) HAL_USART_DMAPause()
+ (++) HAL_USART_DMAResume()
+ (++) HAL_USART_DMAStop()
+
+ (#) A set of Transfer Complete Callbacks are provided in No_Blocking mode:
+ (++) HAL_USART_TxCpltCallback()
+ (++) HAL_USART_RxCpltCallback()
+ (++) HAL_USART_TxHalfCpltCallback()
+ (++) HAL_USART_RxHalfCpltCallback()
+ (++) HAL_USART_ErrorCallback()
+ (++) HAL_USART_TxRxCpltCallback()
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Simplex send an amount of data in blocking mode.
+ * @param husart: USART handle.
+ * @param pTxData: Pointer to data buffer.
+ * @param Size: Amount of data to be sent.
+ * @param Timeout: Timeout duration.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Transmit(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size, uint32_t Timeout)
+{
+ uint16_t* tmp;
+
+ if(husart->State == HAL_USART_STATE_READY)
+ {
+ if((pTxData == NULL) || (Size == 0))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_TX;
+
+ husart->TxXferSize = Size;
+ husart->TxXferCount = Size;
+
+ /* Check the remaining data to be sent */
+ while(husart->TxXferCount > 0)
+ {
+ husart->TxXferCount--;
+ if(USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TC, RESET, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+ if((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ tmp = (uint16_t*) pTxData;
+ husart->Instance->TDR = (*tmp & (uint16_t)0x01FF);
+ pTxData += 2;
+ }
+ else
+ {
+ husart->Instance->TDR = (*pTxData++ & (uint8_t)0xFF);
+ }
+ }
+
+ if(USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TC, RESET, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Receive an amount of data in blocking mode.
+ * @note To receive synchronous data, dummy data are simultaneously transmitted.
+ * @param husart: USART handle.
+ * @param pRxData: Pointer to data buffer.
+ * @param Size: Amount of data to be received.
+ * @param Timeout: Timeout duration.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Receive(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size, uint32_t Timeout)
+{
+ uint16_t* tmp;
+ uint16_t uhMask;
+
+ if(husart->State == HAL_USART_STATE_READY)
+ {
+ if((pRxData == NULL) || (Size == 0))
+ {
+ return HAL_ERROR;
+ }
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_RX;
+
+ husart->RxXferSize = Size;
+ husart->RxXferCount = Size;
+
+ /* Computation of USART mask to apply to RDR register */
+ USART_MASK_COMPUTATION(husart);
+ uhMask = husart->Mask;
+
+ /* as long as data have to be received */
+ while(husart->RxXferCount > 0)
+ {
+ husart->RxXferCount--;
+
+ /* Wait until TC flag is set to send dummy byte in order to generate the
+ * clock for the slave to send data.
+ * Whatever the frame length (7, 8 or 9-bit long), the same dummy value
+ * can be written for all the cases. */
+ if(USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TC, RESET, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x0FF);
+
+ /* Wait for RXNE Flag */
+ if(USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+
+ if((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ tmp = (uint16_t*) pRxData ;
+ *tmp = (uint16_t)(husart->Instance->RDR & uhMask);
+ pRxData +=2;
+ }
+ else
+ {
+ *pRxData++ = (uint8_t)(husart->Instance->RDR & (uint8_t)uhMask);
+ }
+ }
+
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Full-Duplex Send and Receive an amount of data in blocking mode.
+ * @param husart: USART handle.
+ * @param pTxData: pointer to TX data buffer.
+ * @param pRxData: pointer to RX data buffer.
+ * @param Size: amount of data to be sent (same amount to be received).
+ * @param Timeout: Timeout duration.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_TransmitReceive(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData, uint16_t Size, uint32_t Timeout)
+{
+ uint16_t* tmp;
+ uint16_t uhMask;
+
+ if(husart->State == HAL_USART_STATE_READY)
+ {
+ if((pTxData == NULL) || (pRxData == NULL) || (Size == 0))
+ {
+ return HAL_ERROR;
+ }
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_RX;
+
+ husart->RxXferSize = Size;
+ husart->TxXferSize = Size;
+ husart->TxXferCount = Size;
+ husart->RxXferCount = Size;
+
+ /* Computation of USART mask to apply to RDR register */
+ USART_MASK_COMPUTATION(husart);
+ uhMask = husart->Mask;
+
+ /* Check the remain data to be sent */
+ while(husart->TxXferCount > 0)
+ {
+ husart->TxXferCount--;
+ husart->RxXferCount--;
+
+ /* Wait until TC flag is set to send data */
+ if(USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TC, RESET, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+ if((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ tmp = (uint16_t*) pTxData;
+ husart->Instance->TDR = (*tmp & uhMask);
+ pTxData += 2;
+ }
+ else
+ {
+ husart->Instance->TDR = (*pTxData++ & (uint8_t)uhMask);
+ }
+
+ /* Wait for RXNE Flag */
+ if(USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, Timeout) != HAL_OK)
+ {
+ return HAL_TIMEOUT;
+ }
+
+ if((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ tmp = (uint16_t*) pRxData ;
+ *tmp = (uint16_t)(husart->Instance->RDR & uhMask);
+ pRxData +=2;
+ }
+ else
+ {
+ *pRxData++ = (uint8_t)(husart->Instance->RDR & (uint8_t)uhMask);
+ }
+ }
+
+ husart->State = HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Send an amount of data in interrupt mode.
+ * @param husart: USART handle.
+ * @param pTxData: pointer to data buffer.
+ * @param Size: amount of data to be sent.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Transmit_IT(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size)
+{
+ if(husart->State == HAL_USART_STATE_READY)
+ {
+ if((pTxData == NULL ) || (Size == 0))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pTxBuffPtr = pTxData;
+ husart->TxXferSize = Size;
+ husart->TxXferCount = Size;
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_TX;
+
+ /* The USART Error Interrupts: (Frame error, noise error, overrun error)
+ are not managed by the USART Transmit Process to avoid the overrun interrupt
+ when the usart mode is configured for transmit and receive "USART_MODE_TX_RX"
+ to benefit for the frame error and noise interrupts the usart mode should be
+ configured only for transmit "USART_MODE_TX" */
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the USART Transmit Data Register Empty Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TXE);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Receive an amount of data in blocking mode.
+ * @note To receive synchronous data, dummy data are simultaneously transmitted.
+ * @param husart: USART handle.
+ * @param pRxData: pointer to data buffer.
+ * @param Size: amount of data to be received.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Receive_IT(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size)
+{
+ if(husart->State == HAL_USART_STATE_READY)
+ {
+ if((pRxData == NULL ) || (Size == 0))
+ {
+ return HAL_ERROR;
+ }
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pRxBuffPtr = pRxData;
+ husart->RxXferSize = Size;
+ husart->RxXferCount = Size;
+
+ USART_MASK_COMPUTATION(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_RX;
+
+ /* Enable the USART Parity Error Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_PE);
+
+ /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_ERR);
+
+ /* Enable the USART Data Register not empty Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_RXNE);
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+
+ /* Send dummy byte in order to generate the clock for the Slave to send the next data */
+ if(husart->Init.WordLength == USART_WORDLENGTH_9B)
+ {
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x01FF);
+ }
+ else
+ {
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
+ }
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Full-Duplex Send and Receive an amount of data in interrupt mode.
+ * @param husart: USART handle.
+ * @param pTxData: pointer to TX data buffer.
+ * @param pRxData: pointer to RX data buffer.
+ * @param Size: amount of data to be sent (same amount to be received).
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_TransmitReceive_IT(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData, uint16_t Size)
+{
+
+ if(husart->State == HAL_USART_STATE_READY)
+ {
+ if((pTxData == NULL) || (pRxData == NULL) || (Size == 0))
+ {
+ return HAL_ERROR;
+ }
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pRxBuffPtr = pRxData;
+ husart->RxXferSize = Size;
+ husart->RxXferCount = Size;
+ husart->pTxBuffPtr = pTxData;
+ husart->TxXferSize = Size;
+ husart->TxXferCount = Size;
+
+ /* Computation of USART mask to apply to RDR register */
+ USART_MASK_COMPUTATION(husart);
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_TX_RX;
+
+ /* Enable the USART Data Register not empty Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_RXNE);
+
+ /* Enable the USART Parity Error Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_PE);
+
+ /* Enable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_ERR);
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ /* Enable the USART Transmit Data Register Empty Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TXE);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+
+}
+
+/**
+ * @brief Send an amount of data in DMA mode.
+ * @param husart: USART handle.
+ * @param pTxData: pointer to data buffer.
+ * @param Size: amount of data to be sent.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Transmit_DMA(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size)
+{
+ uint32_t *tmp;
+
+ if(husart->State == HAL_USART_STATE_READY)
+ {
+ if((pTxData == NULL ) || (Size == 0))
+ {
+ return HAL_ERROR;
+ }
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pTxBuffPtr = pTxData;
+ husart->TxXferSize = Size;
+ husart->TxXferCount = Size;
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_TX;
+
+ /* Set the USART DMA transfer complete callback */
+ husart->hdmatx->XferCpltCallback = USART_DMATransmitCplt;
+
+ /* Set the USART DMA Half transfer complete callback */
+ husart->hdmatx->XferHalfCpltCallback = USART_DMATxHalfCplt;
+
+ /* Set the DMA error callback */
+ husart->hdmatx->XferErrorCallback = USART_DMAError;
+
+ /* Enable the USART transmit DMA channel */
+ tmp = (uint32_t*)&pTxData;
+ HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t*)tmp, (uint32_t)&husart->Instance->TDR, Size);
+
+ /* Clear the TC flag in the ICR register */
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_TCF);
+
+ /* Enable the DMA transfer for transmit request by setting the DMAT bit
+ in the USART CR3 register */
+ husart->Instance->CR3 |= USART_CR3_DMAT;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Receive an amount of data in DMA mode.
+ * @param husart: USART handle.
+ * @param pRxData: pointer to data buffer.
+ * @param Size: amount of data to be received.
+ * @note When the USART parity is enabled (PCE = 1), the received data contain
+ * the parity bit (MSB position).
+ * @note The USART DMA transmit channel must be configured in order to generate the clock for the slave.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_Receive_DMA(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size)
+{
+ uint32_t *tmp;
+
+ if(husart->State == HAL_USART_STATE_READY)
+ {
+ if((pRxData == NULL ) || (Size == 0))
+ {
+ return HAL_ERROR;
+ }
+
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pRxBuffPtr = pRxData;
+ husart->RxXferSize = Size;
+ husart->pTxBuffPtr = pRxData;
+ husart->TxXferSize = Size;
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_RX;
+
+ /* Set the USART DMA Rx transfer complete callback */
+ husart->hdmarx->XferCpltCallback = USART_DMAReceiveCplt;
+
+ /* Set the USART DMA Half transfer complete callback */
+ husart->hdmarx->XferHalfCpltCallback = USART_DMARxHalfCplt;
+
+ /* Set the USART DMA Rx transfer error callback */
+ husart->hdmarx->XferErrorCallback = USART_DMAError;
+
+ /* Enable the USART receive DMA channel */
+ tmp = (uint32_t*)&pRxData;
+ HAL_DMA_Start_IT(husart->hdmarx, (uint32_t)&husart->Instance->RDR, *(uint32_t*)tmp, Size);
+
+ /* Enable the USART transmit DMA channel: the transmit channel is used in order
+ to generate in the non-blocking mode the clock to the slave device,
+ this mode isn't a simplex receive mode but a full-duplex receive mode */
+ tmp = (uint32_t*)&pRxData;
+ HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t*)tmp, (uint32_t)&husart->Instance->TDR, Size);
+
+ /* Enable the DMA transfer for the receiver request by setting the DMAR bit
+ in the USART CR3 register */
+ husart->Instance->CR3 |= USART_CR3_DMAR;
+
+ /* Enable the DMA transfer for transmit request by setting the DMAT bit
+ in the USART CR3 register */
+ husart->Instance->CR3 |= USART_CR3_DMAT;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Full-Duplex Transmit Receive an amount of data in non-blocking mode.
+ * @param husart: USART handle.
+ * @param pTxData: pointer to TX data buffer.
+ * @param pRxData: pointer to RX data buffer.
+ * @param Size: amount of data to be received/sent.
+ * @note When the USART parity is enabled (PCE = 1) the data received contain the parity bit.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_TransmitReceive_DMA(USART_HandleTypeDef *husart, uint8_t *pTxData, uint8_t *pRxData, uint16_t Size)
+{
+ uint32_t *tmp;
+
+ if(husart->State == HAL_USART_STATE_READY)
+ {
+ if((pTxData == NULL) || (pRxData == NULL) || (Size == 0))
+ {
+ return HAL_ERROR;
+ }
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ husart->pRxBuffPtr = pRxData;
+ husart->RxXferSize = Size;
+ husart->pTxBuffPtr = pTxData;
+ husart->TxXferSize = Size;
+
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+ husart->State = HAL_USART_STATE_BUSY_TX_RX;
+
+ /* Set the USART DMA Rx transfer complete callback */
+ husart->hdmarx->XferCpltCallback = USART_DMAReceiveCplt;
+
+ /* Set the USART DMA Half transfer complete callback */
+ husart->hdmarx->XferHalfCpltCallback = USART_DMARxHalfCplt;
+
+ /* Set the USART DMA Tx transfer complete callback */
+ husart->hdmatx->XferCpltCallback = USART_DMATransmitCplt;
+
+ /* Set the USART DMA Half transfer complete callback */
+ husart->hdmatx->XferHalfCpltCallback = USART_DMATxHalfCplt;
+
+ /* Set the USART DMA Tx transfer error callback */
+ husart->hdmatx->XferErrorCallback = USART_DMAError;
+
+ /* Set the USART DMA Rx transfer error callback */
+ husart->hdmarx->XferErrorCallback = USART_DMAError;
+
+ /* Enable the USART receive DMA channel */
+ tmp = (uint32_t*)&pRxData;
+ HAL_DMA_Start_IT(husart->hdmarx, (uint32_t)&husart->Instance->RDR, *(uint32_t*)tmp, Size);
+
+ /* Enable the USART transmit DMA channel */
+ tmp = (uint32_t*)&pTxData;
+ HAL_DMA_Start_IT(husart->hdmatx, *(uint32_t*)tmp, (uint32_t)&husart->Instance->TDR, Size);
+
+ /* Clear the TC flag in the ICR register */
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_TCF);
+
+ /* Enable the DMA transfer for the receiver request by setting the DMAR bit
+ in the USART CR3 register */
+ husart->Instance->CR3 |= USART_CR3_DMAR;
+
+ /* Enable the DMA transfer for transmit request by setting the DMAT bit
+ in the USART CR3 register */
+ husart->Instance->CR3 |= USART_CR3_DMAT;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Pause the DMA Transfer.
+ * @param husart: USART handle.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_DMAPause(USART_HandleTypeDef *husart)
+{
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ if(husart->State == HAL_USART_STATE_BUSY_TX)
+ {
+ /* Disable the USART DMA Tx request */
+ husart->Instance->CR3 &= (uint32_t)(~USART_CR3_DMAT);
+ }
+ else if(husart->State == HAL_USART_STATE_BUSY_RX)
+ {
+ /* Disable the USART DMA Rx request */
+ husart->Instance->CR3 &= (uint32_t)(~USART_CR3_DMAR);
+ }
+ else if(husart->State == HAL_USART_STATE_BUSY_TX_RX)
+ {
+ /* Disable the USART DMA Tx request */
+ husart->Instance->CR3 &= (uint32_t)(~USART_CR3_DMAT);
+ /* Disable the USART DMA Rx request */
+ husart->Instance->CR3 &= (uint32_t)(~USART_CR3_DMAR);
+ }
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Resume the DMA Transfer.
+ * @param husart: USART handle.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_DMAResume(USART_HandleTypeDef *husart)
+{
+ /* Process Locked */
+ __HAL_LOCK(husart);
+
+ if(husart->State == HAL_USART_STATE_BUSY_TX)
+ {
+ /* Enable the USART DMA Tx request */
+ husart->Instance->CR3 |= USART_CR3_DMAT;
+ }
+ else if(husart->State == HAL_USART_STATE_BUSY_RX)
+ {
+ /* Clear the Overrun flag before resuming the Rx transfer*/
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF);
+
+ /* Enable the USART DMA Rx request */
+ husart->Instance->CR3 |= USART_CR3_DMAR;
+ }
+ else if(husart->State == HAL_USART_STATE_BUSY_TX_RX)
+ {
+ /* Clear the Overrun flag before resuming the Rx transfer*/
+ __HAL_USART_CLEAR_FLAG(husart, USART_CLEAR_OREF);
+
+ /* Enable the USART DMA Rx request before the DMA Tx request */
+ husart->Instance->CR3 |= USART_CR3_DMAR;
+
+ /* Enable the USART DMA Tx request */
+ husart->Instance->CR3 |= USART_CR3_DMAT;
+ }
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Stop the DMA Transfer.
+ * @param husart: USART handle.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_USART_DMAStop(USART_HandleTypeDef *husart)
+{
+ /* The Lock is not implemented on this API to allow the user application
+ to call the HAL USART API under callbacks HAL_USART_TxCpltCallback() / HAL_USART_RxCpltCallback() /
+ HAL_USART_TxHalfCpltCallback / HAL_USART_RxHalfCpltCallback:
+ indeed, when HAL_DMA_Abort() API is called, the DMA TX/RX Transfer or Half Transfer complete
+ interrupt is generated if the DMA transfer interruption occurs at the middle or at the end of
+ the stream and the corresponding call back is executed. */
+
+ /* Disable the USART Tx/Rx DMA requests */
+ husart->Instance->CR3 &= ~USART_CR3_DMAT;
+ husart->Instance->CR3 &= ~USART_CR3_DMAR;
+
+ /* Abort the USART DMA tx channel */
+ if(husart->hdmatx != NULL)
+ {
+ HAL_DMA_Abort(husart->hdmatx);
+ }
+ /* Abort the USART DMA rx channel */
+ if(husart->hdmarx != NULL)
+ {
+ HAL_DMA_Abort(husart->hdmarx);
+ }
+
+ husart->State = HAL_USART_STATE_READY;
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Handle USART interrupt request.
+ * @param husart: USART handle.
+ * @retval None
+ */
+void HAL_USART_IRQHandler(USART_HandleTypeDef *husart)
+{
+
+ /* USART parity error interrupt occurred ------------------------------------*/
+ if((__HAL_USART_GET_IT(husart, USART_IT_PE) != RESET) && (__HAL_USART_GET_IT_SOURCE(husart, USART_IT_PE) != RESET))
+ {
+ __HAL_USART_CLEAR_IT(husart, USART_CLEAR_PEF);
+ husart->ErrorCode |= HAL_USART_ERROR_PE;
+ /* Set the USART state ready to be able to start again the process */
+ husart->State = HAL_USART_STATE_READY;
+ }
+
+ /* USART frame error interrupt occurred -------------------------------------*/
+ if((__HAL_USART_GET_IT(husart, USART_IT_FE) != RESET) && (__HAL_USART_GET_IT_SOURCE(husart, USART_IT_ERR) != RESET))
+ {
+ __HAL_USART_CLEAR_IT(husart, USART_CLEAR_FEF);
+ husart->ErrorCode |= HAL_USART_ERROR_FE;
+ /* Set the USART state ready to be able to start again the process */
+ husart->State = HAL_USART_STATE_READY;
+ }
+
+ /* USART noise error interrupt occurred -------------------------------------*/
+ if((__HAL_USART_GET_IT(husart, USART_IT_NE) != RESET) && (__HAL_USART_GET_IT_SOURCE(husart, USART_IT_ERR) != RESET))
+ {
+ __HAL_USART_CLEAR_IT(husart, USART_CLEAR_NEF);
+ husart->ErrorCode |= HAL_USART_ERROR_NE;
+ /* Set the USART state ready to be able to start again the process */
+ husart->State = HAL_USART_STATE_READY;
+ }
+
+ /* USART Over-Run interrupt occurred ----------------------------------------*/
+ if((__HAL_USART_GET_IT(husart, USART_IT_ORE) != RESET) && (__HAL_USART_GET_IT_SOURCE(husart, USART_IT_ERR) != RESET))
+ {
+ __HAL_USART_CLEAR_IT(husart, USART_CLEAR_OREF);
+ husart->ErrorCode |= HAL_USART_ERROR_ORE;
+ /* Set the USART state ready to be able to start again the process */
+ husart->State = HAL_USART_STATE_READY;
+ }
+
+ /* Call USART Error Call back function if need be --------------------------*/
+ if(husart->ErrorCode != HAL_USART_ERROR_NONE)
+ {
+ HAL_USART_ErrorCallback(husart);
+ }
+
+ /* USART in mode Receiver --------------------------------------------------*/
+ if((__HAL_USART_GET_IT(husart, USART_IT_RXNE) != RESET) && (__HAL_USART_GET_IT_SOURCE(husart, USART_IT_RXNE) != RESET))
+ {
+ if(husart->State == HAL_USART_STATE_BUSY_RX)
+ {
+ USART_Receive_IT(husart);
+ }
+ else
+ {
+ USART_TransmitReceive_IT(husart);
+ }
+ }
+
+ /* USART in mode Transmitter -----------------------------------------------*/
+ if((__HAL_USART_GET_IT(husart, USART_IT_TXE) != RESET) &&(__HAL_USART_GET_IT_SOURCE(husart, USART_IT_TXE) != RESET))
+ {
+ if(husart->State == HAL_USART_STATE_BUSY_TX)
+ {
+ USART_Transmit_IT(husart);
+ }
+ else
+ {
+ USART_TransmitReceive_IT(husart);
+ }
+ }
+
+ /* USART in mode Transmitter (transmission end) -----------------------------*/
+ if((__HAL_USART_GET_IT(husart, USART_IT_TC) != RESET) &&(__HAL_USART_GET_IT_SOURCE(husart, USART_IT_TC) != RESET))
+ {
+ USART_EndTransmit_IT(husart);
+ }
+
+}
+
+/**
+ * @brief Tx Transfer completed callback.
+ * @param husart: USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_TxCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_TxCpltCallback can be implemented in the user file.
+ */
+}
+
+/**
+ * @brief Tx Half Transfer completed callback.
+ * @param husart: USART handle.
+ * @retval None
+ */
+ __weak void HAL_USART_TxHalfCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* NOTE: This function should not be modified, when the callback is needed,
+ the HAL_USART_TxHalfCpltCallback can be implemented in the user file.
+ */
+}
+
+/**
+ * @brief Rx Transfer completed callback.
+ * @param husart: USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_RxCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* NOTE: This function should not be modified, when the callback is needed,
+ the HAL_USART_RxCpltCallback can be implemented in the user file.
+ */
+}
+
+/**
+ * @brief Rx Half Transfer completed callback.
+ * @param husart: USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_RxHalfCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_RxHalfCpltCallback can be implemented in the user file
+ */
+}
+
+/**
+ * @brief Tx/Rx Transfers completed callback for the non-blocking process.
+ * @param husart: USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_TxRxCpltCallback(USART_HandleTypeDef *husart)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_TxRxCpltCallback can be implemented in the user file
+ */
+}
+
+/**
+ * @brief USART error callback.
+ * @param husart: USART handle.
+ * @retval None
+ */
+__weak void HAL_USART_ErrorCallback(USART_HandleTypeDef *husart)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_USART_ErrorCallback can be implemented in the user file.
+ */
+}
+
+/**
+ * @}
+ */
+
+/** @defgroup USART_Exported_Functions_Group4 Peripheral State and Error functions
+ * @brief USART Peripheral State and Error functions
+ *
+@verbatim
+ ==============================================================================
+ ##### Peripheral State and Error functions #####
+ ==============================================================================
+ [..]
+ This subsection provides functions allowing to :
+ (+) Return the USART handle state
+ (+) Return the USART handle error code
+
+@endverbatim
+ * @{
+ */
+
+
+/**
+ * @brief Return the USART handle state.
+ * @param husart : pointer to a USART_HandleTypeDef structure that contains
+ * the configuration information for the specified USART.
+ * @retval USART handle state
+ */
+HAL_USART_StateTypeDef HAL_USART_GetState(USART_HandleTypeDef *husart)
+{
+ return husart->State;
+}
+
+/**
+ * @brief Return the USART error code.
+ * @param husart : pointer to a USART_HandleTypeDef structure that contains
+ * the configuration information for the specified USART.
+ * @retval USART handle Error Code
+ */
+uint32_t HAL_USART_GetError(USART_HandleTypeDef *husart)
+{
+ return husart->ErrorCode;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup USART_Private_Functions USART Private Functions
+ * @{
+ */
+
+/**
+ * @brief DMA USART transmit process complete callback.
+ * @param hdma: DMA handle.
+ * @retval None
+ */
+static void USART_DMATransmitCplt(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef* husart = ( USART_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
+
+ /* DMA Normal mode */
+ if ( HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC) )
+ {
+ husart->TxXferCount = 0;
+
+ if(husart->State == HAL_USART_STATE_BUSY_TX)
+ {
+ /* Disable the DMA transfer for transmit request by resetting the DMAT bit
+ in the USART CR3 register */
+ husart->Instance->CR3 &= ~(USART_CR3_DMAT);
+
+ /* Enable the USART Transmit Complete Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TC);
+ }
+ }
+ /* DMA Circular mode */
+ else
+ {
+ if(husart->State == HAL_USART_STATE_BUSY_TX)
+ {
+ HAL_USART_TxCpltCallback(husart);
+ }
+ }
+}
+
+
+/**
+ * @brief DMA USART transmit process half complete callback.
+ * @param hdma : DMA handle.
+ * @retval None
+ */
+static void USART_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef* husart = (USART_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
+
+ HAL_USART_TxHalfCpltCallback(husart);
+}
+
+/**
+ * @brief DMA USART receive process complete callback.
+ * @param hdma: DMA handle.
+ * @retval None
+ */
+static void USART_DMAReceiveCplt(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef* husart = ( USART_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
+
+ /* DMA Normal mode */
+ if ( HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC) )
+ {
+ husart->RxXferCount = 0;
+
+ /* Disable the DMA RX transfer for the receiver request by resetting the DMAR bit
+ in USART CR3 register */
+ husart->Instance->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DMAR);
+ /* similarly, disable the DMA TX transfer that was started to provide the
+ clock to the slave device */
+ husart->Instance->CR3 &= (uint32_t)~((uint32_t)USART_CR3_DMAT);
+
+ if(husart->State == HAL_USART_STATE_BUSY_RX)
+ {
+ HAL_USART_RxCpltCallback(husart);
+ }
+ /* The USART state is HAL_USART_STATE_BUSY_TX_RX */
+ else
+ {
+ HAL_USART_TxRxCpltCallback(husart);
+ }
+ husart->State= HAL_USART_STATE_READY;
+ }
+ /* DMA circular mode */
+ else
+ {
+ if(husart->State == HAL_USART_STATE_BUSY_RX)
+ {
+ HAL_USART_RxCpltCallback(husart);
+ }
+ /* The USART state is HAL_USART_STATE_BUSY_TX_RX */
+ else
+ {
+ HAL_USART_TxRxCpltCallback(husart);
+ }
+ }
+
+}
+
+/**
+ * @brief DMA USART receive process half complete callback.
+ * @param hdma : DMA handle.
+ * @retval None
+ */
+static void USART_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef* husart = (USART_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
+
+ HAL_USART_RxHalfCpltCallback(husart);
+}
+
+/**
+ * @brief DMA USART communication error callback.
+ * @param hdma: DMA handle.
+ * @retval None
+ */
+static void USART_DMAError(DMA_HandleTypeDef *hdma)
+{
+ USART_HandleTypeDef* husart = ( USART_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
+
+ husart->RxXferCount = 0;
+ husart->TxXferCount = 0;
+ husart->ErrorCode |= HAL_USART_ERROR_DMA;
+ husart->State= HAL_USART_STATE_READY;
+
+ HAL_USART_ErrorCallback(husart);
+}
+
+/**
+ * @brief Handle USART Communication Timeout.
+ * @param husart: USART handle.
+ * @param Flag: specifies the USART flag to check.
+ * @param Status: the Flag status (SET or RESET).
+ * @param Timeout: timeout duration.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef USART_WaitOnFlagUntilTimeout(USART_HandleTypeDef *husart, uint32_t Flag, FlagStatus Status, uint32_t Timeout)
+{
+ uint32_t tickstart = HAL_GetTick();
+
+ /* Wait until flag is set */
+ if(Status == RESET)
+ {
+ while(__HAL_USART_GET_FLAG(husart, Flag) == RESET)
+ {
+ /* Check for the Timeout */
+ if(Timeout != HAL_MAX_DELAY)
+ {
+ if((Timeout == 0) || ((HAL_GetTick()-tickstart) > Timeout))
+ {
+ /* Disable TXE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts for the interrupt process */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_TXE);
+ __HAL_USART_DISABLE_IT(husart, USART_IT_RXNE);
+ __HAL_USART_DISABLE_IT(husart, USART_IT_PE);
+ __HAL_USART_DISABLE_IT(husart, USART_IT_ERR);
+
+ husart->State= HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ }
+ else
+ {
+ while(__HAL_USART_GET_FLAG(husart, Flag) != RESET)
+ {
+ /* Check for the Timeout */
+ if(Timeout != HAL_MAX_DELAY)
+ {
+ if((Timeout == 0) || ((HAL_GetTick()-tickstart) > Timeout))
+ {
+ /* Disable TXE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts for the interrupt process */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_TXE);
+ __HAL_USART_DISABLE_IT(husart, USART_IT_RXNE);
+ __HAL_USART_DISABLE_IT(husart, USART_IT_PE);
+ __HAL_USART_DISABLE_IT(husart, USART_IT_ERR);
+
+ husart->State= HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_TIMEOUT;
+ }
+ }
+ }
+ }
+ return HAL_OK;
+}
+
+/**
+ * @brief Configure the USART peripheral.
+ * @param husart: USART handle.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef USART_SetConfig(USART_HandleTypeDef *husart)
+{
+ uint32_t tmpreg = 0x0;
+ USART_ClockSourceTypeDef clocksource = USART_CLOCKSOURCE_UNDEFINED;
+ HAL_StatusTypeDef ret = HAL_OK;
+ uint16_t brrtemp = 0x0000;
+ uint16_t usartdiv = 0x0000;
+
+ /* Check the parameters */
+ assert_param(IS_USART_POLARITY(husart->Init.CLKPolarity));
+ assert_param(IS_USART_PHASE(husart->Init.CLKPhase));
+ assert_param(IS_USART_LASTBIT(husart->Init.CLKLastBit));
+ assert_param(IS_USART_BAUDRATE(husart->Init.BaudRate));
+ assert_param(IS_USART_WORD_LENGTH(husart->Init.WordLength));
+ assert_param(IS_USART_STOPBITS(husart->Init.StopBits));
+ assert_param(IS_USART_PARITY(husart->Init.Parity));
+ assert_param(IS_USART_MODE(husart->Init.Mode));
+
+
+ /*-------------------------- USART CR1 Configuration -----------------------*/
+ /* Clear M, PCE, PS, TE and RE bits and configure
+ * the USART Word Length, Parity and Mode:
+ * set the M bits according to husart->Init.WordLength value
+ * set PCE and PS bits according to husart->Init.Parity value
+ * set TE and RE bits according to husart->Init.Mode value
+ * force OVER8 to 1 to allow to reach the maximum speed (Fclock/8) */
+ tmpreg = (uint32_t)husart->Init.WordLength | husart->Init.Parity | husart->Init.Mode | USART_CR1_OVER8;
+ MODIFY_REG(husart->Instance->CR1, USART_CR1_FIELDS, tmpreg);
+
+ /*---------------------------- USART CR2 Configuration ---------------------*/
+ /* Clear and configure the USART Clock, CPOL, CPHA, LBCL and STOP bits:
+ * set CPOL bit according to husart->Init.CLKPolarity value
+ * set CPHA bit according to husart->Init.CLKPhase value
+ * set LBCL bit according to husart->Init.CLKLastBit value
+ * set STOP[13:12] bits according to husart->Init.StopBits value */
+ tmpreg = (uint32_t)(USART_CLOCK_ENABLE);
+ tmpreg |= ((uint32_t)husart->Init.CLKPolarity | (uint32_t)husart->Init.CLKPhase);
+ tmpreg |= ((uint32_t)husart->Init.CLKLastBit | (uint32_t)husart->Init.StopBits);
+ MODIFY_REG(husart->Instance->CR2, USART_CR2_FIELDS, tmpreg);
+
+ /*-------------------------- USART CR3 Configuration -----------------------*/
+ /* no CR3 register configuration */
+
+ /*-------------------------- USART BRR Configuration -----------------------*/
+ /* BRR is filled-up according to OVER8 bit setting which is forced to 1 */
+ USART_GETCLOCKSOURCE(husart, clocksource);
+ switch (clocksource)
+ {
+ case USART_CLOCKSOURCE_PCLK1:
+ usartdiv = (uint16_t)((2*HAL_RCC_GetPCLK1Freq()) / husart->Init.BaudRate);
+ break;
+ case USART_CLOCKSOURCE_PCLK2:
+ usartdiv = (uint16_t)((2*HAL_RCC_GetPCLK2Freq()) / husart->Init.BaudRate);
+ break;
+ case USART_CLOCKSOURCE_HSI:
+ usartdiv = (uint16_t)((2*HSI_VALUE) / husart->Init.BaudRate);
+ break;
+ case USART_CLOCKSOURCE_SYSCLK:
+ usartdiv = (uint16_t)((2*HAL_RCC_GetSysClockFreq()) / husart->Init.BaudRate);
+ break;
+ case USART_CLOCKSOURCE_LSE:
+ usartdiv = (uint16_t)((2*LSE_VALUE) / husart->Init.BaudRate);
+ break;
+ case USART_CLOCKSOURCE_UNDEFINED:
+ default:
+ ret = HAL_ERROR;
+ break;
+ }
+
+ brrtemp = usartdiv & 0xFFF0;
+ brrtemp |= (uint16_t)((usartdiv & (uint16_t)0x000F) >> 1U);
+ husart->Instance->BRR = brrtemp;
+
+ return ret;
+}
+
+/**
+ * @brief Check the USART Idle State.
+ * @param husart: USART handle.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef USART_CheckIdleState(USART_HandleTypeDef *husart)
+{
+ /* Initialize the USART ErrorCode */
+ husart->ErrorCode = HAL_USART_ERROR_NONE;
+
+ /* Check if the Transmitter is enabled */
+ if((husart->Instance->CR1 & USART_CR1_TE) == USART_CR1_TE)
+ {
+ /* Wait until TEACK flag is set */
+ if(USART_WaitOnFlagUntilTimeout(husart, USART_ISR_TEACK, RESET, USART_TEACK_REACK_TIMEOUT) != HAL_OK)
+ {
+ /* Timeout occurred */
+ return HAL_TIMEOUT;
+ }
+ }
+ /* Check if the Receiver is enabled */
+ if((husart->Instance->CR1 & USART_CR1_RE) == USART_CR1_RE)
+ {
+ /* Wait until REACK flag is set */
+ if(USART_WaitOnFlagUntilTimeout(husart, USART_ISR_REACK, RESET, USART_TEACK_REACK_TIMEOUT) != HAL_OK)
+ {
+ /* Timeout occurred */
+ return HAL_TIMEOUT;
+ }
+ }
+
+ /* Initialize the USART state*/
+ husart->State= HAL_USART_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(husart);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Simplex send an amount of data in non-blocking mode.
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_Transmit_IT().
+ * @note The USART errors are not managed to avoid the overrun error.
+ * @param husart: USART handle.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef USART_Transmit_IT(USART_HandleTypeDef *husart)
+{
+ uint16_t* tmp;
+
+ if(husart->State == HAL_USART_STATE_BUSY_TX)
+ {
+
+ if(husart->TxXferCount == 0)
+ {
+ /* Disable the USART Transmit Complete Interrupt */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_TXE);
+
+ /* Enable the USART Transmit Complete Interrupt */
+ __HAL_USART_ENABLE_IT(husart, USART_IT_TC);
+
+ return HAL_OK;
+ }
+ else
+ {
+ if((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ tmp = (uint16_t*) husart->pTxBuffPtr;
+ husart->Instance->TDR = (*tmp & (uint16_t)0x01FF);
+ husart->pTxBuffPtr += 2;
+ }
+ else
+ {
+ husart->Instance->TDR = (uint8_t)(*husart->pTxBuffPtr++ & (uint8_t)0xFF);
+ }
+
+ husart->TxXferCount--;
+
+ return HAL_OK;
+ }
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+
+/**
+ * @brief Wraps up transmission in non-blocking mode.
+ * @param husart: pointer to a USART_HandleTypeDef structure that contains
+ * the configuration information for the specified USART module.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef USART_EndTransmit_IT(USART_HandleTypeDef *husart)
+{
+ /* Disable the USART Transmit Complete Interrupt */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_TC);
+
+ /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_ERR);
+
+ husart->State = HAL_USART_STATE_READY;
+
+ HAL_USART_TxCpltCallback(husart);
+
+ return HAL_OK;
+}
+
+
+/**
+ * @brief Simplex receive an amount of data in non-blocking mode.
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_Receive_IT().
+ * @param husart: USART handle
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef USART_Receive_IT(USART_HandleTypeDef *husart)
+{
+ uint16_t* tmp;
+ uint16_t uhMask = husart->Mask;
+
+ if(husart->State == HAL_USART_STATE_BUSY_RX)
+ {
+
+ if((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ tmp = (uint16_t*) husart->pRxBuffPtr;
+ *tmp = (uint16_t)(husart->Instance->RDR & uhMask);
+ husart->pRxBuffPtr += 2;
+ }
+ else
+ {
+ *husart->pRxBuffPtr++ = (uint8_t)(husart->Instance->RDR & (uint8_t)uhMask);
+ }
+ /* Send dummy byte in order to generate the clock for the Slave to Send the next data */
+ husart->Instance->TDR = (USART_DUMMY_DATA & (uint16_t)0x00FF);
+
+ if(--husart->RxXferCount == 0)
+ {
+ __HAL_USART_DISABLE_IT(husart, USART_IT_RXNE);
+
+ /* Disable the USART Parity Error Interrupt */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_PE);
+
+ /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_ERR);
+
+ husart->State = HAL_USART_STATE_READY;
+
+ HAL_USART_RxCpltCallback(husart);
+
+ return HAL_OK;
+ }
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @brief Full-Duplex Send receive an amount of data in full-duplex mode (non-blocking).
+ * @note Function called under interruption only, once
+ * interruptions have been enabled by HAL_USART_TransmitReceive_IT().
+ * @param husart: USART handle.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef USART_TransmitReceive_IT(USART_HandleTypeDef *husart)
+{
+ uint16_t* tmp;
+ uint16_t uhMask = husart->Mask;
+
+ if(husart->State == HAL_USART_STATE_BUSY_TX_RX)
+ {
+
+ if(husart->TxXferCount != 0x00)
+ {
+ if(__HAL_USART_GET_FLAG(husart, USART_FLAG_TXE) != RESET)
+ {
+ if((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ tmp = (uint16_t*) husart->pTxBuffPtr;
+ husart->Instance->TDR = (uint16_t)(*tmp & uhMask);
+ husart->pTxBuffPtr += 2;
+ }
+ else
+ {
+ husart->Instance->TDR = (uint8_t)(*husart->pTxBuffPtr++ & (uint8_t)uhMask);
+ }
+ husart->TxXferCount--;
+
+ /* Check the latest data transmitted */
+ if(husart->TxXferCount == 0)
+ {
+ __HAL_USART_DISABLE_IT(husart, USART_IT_TXE);
+ }
+ }
+ }
+
+ if(husart->RxXferCount != 0x00)
+ {
+ if(__HAL_USART_GET_FLAG(husart, USART_FLAG_RXNE) != RESET)
+ {
+ if((husart->Init.WordLength == USART_WORDLENGTH_9B) && (husart->Init.Parity == USART_PARITY_NONE))
+ {
+ tmp = (uint16_t*) husart->pRxBuffPtr;
+ *tmp = (uint16_t)(husart->Instance->RDR & uhMask);
+ husart->pRxBuffPtr += 2;
+ }
+ else
+ {
+ *husart->pRxBuffPtr++ = (uint8_t)(husart->Instance->RDR & (uint8_t)uhMask);
+ }
+ husart->RxXferCount--;
+ }
+ }
+
+ /* Check the latest data received */
+ if(husart->RxXferCount == 0)
+ {
+ __HAL_USART_DISABLE_IT(husart, USART_IT_RXNE);
+
+ /* Disable the USART Parity Error Interrupt */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_PE);
+
+ /* Disable the USART Error Interrupt: (Frame error, noise error, overrun error) */
+ __HAL_USART_DISABLE_IT(husart, USART_IT_ERR);
+
+ husart->State = HAL_USART_STATE_READY;
+
+ HAL_USART_TxRxCpltCallback(husart);
+
+ return HAL_OK;
+ }
+
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_BUSY;
+ }
+}
+
+/**
+ * @}
+ */
+
+#endif /* HAL_USART_MODULE_ENABLED */
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/