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Diff: targets/cmsis/TARGET_STM/TARGET_NUCLEO_L152RE/stm32l1xx_gpio.c
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_L152RE/stm32l1xx_gpio.c Mon Jan 27 14:30:07 2014 +0000 @@ -0,0 +1,557 @@ +/** + ****************************************************************************** + * @file stm32l1xx_gpio.c + * @author MCD Application Team + * @version V1.2.0 + * @date 22-February-2013 + * @brief This file provides firmware functions to manage the following + * functionalities of the GPIO peripheral: + * + Initialization and Configuration + * + GPIO Read and Write + * + GPIO Alternate functions configuration + * + * @verbatim + =========================================================================== + ##### How to use this driver ##### + =========================================================================== + [..] + (#) Enable the GPIO AHB clock using RCC_AHBPeriphClockCmd() + (#) Configure the GPIO pin(s) using GPIO_Init() + Four possible configuration are available for each pin: + (++) Input: Floating, Pull-up, Pull-down. + (++) Output: Push-Pull (Pull-up, Pull-down or no Pull) + Open Drain (Pull-up, Pull-down or no Pull). + In output mode, the speed is configurable: Very Low, Low, + Medium or High. + (++) Alternate Function: Push-Pull (Pull-up, Pull-down or no Pull) + Open Drain (Pull-up, Pull-down or no Pull). + (++) Analog: required mode when a pin is to be used as ADC channel, + DAC output or comparator input. + (#) Peripherals alternate function: + (++) For ADC, DAC and comparators, configure the desired pin in + analog mode using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AN + (++) For other peripherals (TIM, USART...): + (+++) Connect the pin to the desired peripherals' Alternate + Function (AF) using GPIO_PinAFConfig() function. + (+++) Configure the desired pin in alternate function mode using + GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF + (+++) Select the type, pull-up/pull-down and output speed via + GPIO_PuPd, GPIO_OType and GPIO_Speed members. + (+++) Call GPIO_Init() function. + (#) To get the level of a pin configured in input mode use GPIO_ReadInputDataBit() + (#) To set/reset the level of a pin configured in output mode use + GPIO_SetBits()/GPIO_ResetBits() + (#) During and just after reset, the alternate functions are not + active and the GPIO pins are configured in input floating mode + (except JTAG pins). + (#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as + general-purpose (PC14 and PC15, respectively) when the LSE + oscillator is off. The LSE has priority over the GPIO function. + (#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as + general-purpose PH0 and PH1, respectively, when the HSE + oscillator is off. The HSE has priority over the GPIO function. + @endverbatim + * + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2> + * + * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); + * You may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.st.com/software_license_agreement_liberty_v2 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32l1xx_gpio.h" +#include "stm32l1xx_rcc.h" + +/** @addtogroup STM32L1xx_StdPeriph_Driver + * @{ + */ + +/** @defgroup GPIO + * @brief GPIO driver modules + * @{ + */ + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ + +/** @defgroup GPIO_Private_Functions + * @{ + */ + +/** @defgroup GPIO_Group1 Initialization and Configuration + * @brief Initialization and Configuration + * +@verbatim + =============================================================================== + ##### Initialization and Configuration ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Deinitializes the GPIOx peripheral registers to their default reset + * values. + * By default, The GPIO pins are configured in input floating mode + * (except JTAG pins). + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @retval None + */ +void GPIO_DeInit(GPIO_TypeDef* GPIOx) +{ + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + + if(GPIOx == GPIOA) + { + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, ENABLE); + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, DISABLE); + } + else if(GPIOx == GPIOB) + { + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, ENABLE); + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, DISABLE); + } + else if(GPIOx == GPIOC) + { + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOC, ENABLE); + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOC, DISABLE); + } + else if(GPIOx == GPIOD) + { + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOD, ENABLE); + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOD, DISABLE); + } + else if(GPIOx == GPIOE) + { + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOE, ENABLE); + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOE, DISABLE); + } + else if(GPIOx == GPIOF) + { + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOF, ENABLE); + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOF, DISABLE); + } + else if(GPIOx == GPIOG) + { + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOG, ENABLE); + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOG, DISABLE); + } + else + { + if(GPIOx == GPIOH) + { + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOH, ENABLE); + RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOH, DISABLE); + } + } +} + +/** + * @brief Initializes the GPIOx peripheral according to the specified + * parameters in the GPIO_InitStruct. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @param GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that + * contains the configuration information for the specified GPIO + * peripheral. + + * @retval None + */ +void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct) +{ + uint32_t pinpos = 0x00, pos = 0x00 , currentpin = 0x00; + + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin)); + assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode)); + assert_param(IS_GPIO_PUPD(GPIO_InitStruct->GPIO_PuPd)); + + /* -------------------------Configure the port pins---------------- */ + /*-- GPIO Mode Configuration --*/ + for (pinpos = 0x00; pinpos < 0x10; pinpos++) + { + pos = ((uint32_t)0x01) << pinpos; + + /* Get the port pins position */ + currentpin = (GPIO_InitStruct->GPIO_Pin) & pos; + + if (currentpin == pos) + { + GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (pinpos * 2)); + + GPIOx->MODER |= (((uint32_t)GPIO_InitStruct->GPIO_Mode) << (pinpos * 2)); + + if ((GPIO_InitStruct->GPIO_Mode == GPIO_Mode_OUT) || (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_AF)) + { + /* Check Speed mode parameters */ + assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed)); + + /* Speed mode configuration */ + GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (pinpos * 2)); + GPIOx->OSPEEDR |= ((uint32_t)(GPIO_InitStruct->GPIO_Speed) << (pinpos * 2)); + + /*Check Output mode parameters */ + assert_param(IS_GPIO_OTYPE(GPIO_InitStruct->GPIO_OType)); + + /* Output mode configuration */ + GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)pinpos)) ; + GPIOx->OTYPER |= (uint16_t)(((uint16_t)GPIO_InitStruct->GPIO_OType) << ((uint16_t)pinpos)); + } + + /* Pull-up Pull down resistor configuration */ + GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)pinpos * 2)); + GPIOx->PUPDR |= (((uint32_t)GPIO_InitStruct->GPIO_PuPd) << (pinpos * 2)); + } + } +} + +/** + * @brief Fills each GPIO_InitStruct member with its default value. + * @param GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure which will + * be initialized. + * @retval None + */ +void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct) +{ + /* Reset GPIO init structure parameters values */ + GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All; + GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN; + GPIO_InitStruct->GPIO_Speed = GPIO_Speed_400KHz; + GPIO_InitStruct->GPIO_OType = GPIO_OType_PP; + GPIO_InitStruct->GPIO_PuPd = GPIO_PuPd_NOPULL; +} + +/** + * @brief Locks GPIO Pins configuration registers. + * The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR, + * GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH. + * The configuration of the locked GPIO pins can no longer be modified + * until the next reset. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @param GPIO_Pin: specifies the port bit to be written. + * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). + * @retval None + */ +void GPIO_PinLockConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) +{ + __IO uint32_t tmp = 0x00010000; + + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + assert_param(IS_GPIO_PIN(GPIO_Pin)); + + tmp |= GPIO_Pin; + /* Set LCKK bit */ + GPIOx->LCKR = tmp; + /* Reset LCKK bit */ + GPIOx->LCKR = GPIO_Pin; + /* Set LCKK bit */ + GPIOx->LCKR = tmp; + /* Read LCKK bit*/ + tmp = GPIOx->LCKR; + /* Read LCKK bit*/ + tmp = GPIOx->LCKR; +} + +/** + * @} + */ + +/** @defgroup GPIO_Group2 GPIO Read and Write + * @brief GPIO Read and Write + * +@verbatim + =============================================================================== + ##### GPIO Read and Write ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Reads the specified input port pin. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @param GPIO_Pin: specifies the port bit to read. + * This parameter can be GPIO_Pin_x where x can be (0..15). + * @retval The input port pin value. + */ +uint8_t GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) +{ + uint8_t bitstatus = 0x00; + + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + assert_param(IS_GET_GPIO_PIN(GPIO_Pin)); + + if ((GPIOx->IDR & GPIO_Pin) != (uint32_t)Bit_RESET) + { + bitstatus = (uint8_t)Bit_SET; + } + else + { + bitstatus = (uint8_t)Bit_RESET; + } + return bitstatus; +} + +/** + * @brief Reads the specified GPIO input data port. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @retval GPIO input data port value. + */ +uint16_t GPIO_ReadInputData(GPIO_TypeDef* GPIOx) +{ + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + + return ((uint16_t)GPIOx->IDR); +} + +/** + * @brief Reads the specified output data port bit. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @param GPIO_Pin: Specifies the port bit to read. + * This parameter can be GPIO_Pin_x where x can be (0..15). + * @retval The output port pin value. + */ +uint8_t GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) +{ + uint8_t bitstatus = 0x00; + + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + assert_param(IS_GET_GPIO_PIN(GPIO_Pin)); + + if ((GPIOx->ODR & GPIO_Pin) != (uint32_t)Bit_RESET) + { + bitstatus = (uint8_t)Bit_SET; + } + else + { + bitstatus = (uint8_t)Bit_RESET; + } + return bitstatus; +} + +/** + * @brief Reads the specified GPIO output data port. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @retval GPIO output data port value. + */ +uint16_t GPIO_ReadOutputData(GPIO_TypeDef* GPIOx) +{ + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + + return ((uint16_t)GPIOx->ODR); +} + +/** + * @brief Sets the selected data port bits. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @param GPIO_Pin: specifies the port bits to be written. + * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). + * @note This functions uses GPIOx_BSRR register to allow atomic read/modify + * accesses. In this way, there is no risk of an IRQ occurring between + * the read and the modify access. + * @retval None + */ +void GPIO_SetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) +{ + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + assert_param(IS_GPIO_PIN(GPIO_Pin)); + + GPIOx->BSRRL = GPIO_Pin; +} + +/** + * @brief Clears the selected data port bits. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @param GPIO_Pin: specifies the port bits to be written. + * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). + * @note This functions uses GPIOx_BSRR register to allow atomic read/modify + * accesses. In this way, there is no risk of an IRQ occurring between + * the read and the modify access. + * @retval None + */ +void GPIO_ResetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) +{ + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + assert_param(IS_GPIO_PIN(GPIO_Pin)); + + GPIOx->BSRRH = GPIO_Pin; +} + +/** + * @brief Sets or clears the selected data port bit. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @param GPIO_Pin: specifies the port bit to be written. + * This parameter can be one of GPIO_Pin_x where x can be (0..15). + * @param BitVal: specifies the value to be written to the selected bit. + * This parameter can be one of the BitAction enum values: + * @arg Bit_RESET: to clear the port pin + * @arg Bit_SET: to set the port pin + * @retval None + */ +void GPIO_WriteBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, BitAction BitVal) +{ + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + assert_param(IS_GET_GPIO_PIN(GPIO_Pin)); + assert_param(IS_GPIO_BIT_ACTION(BitVal)); + + if (BitVal != Bit_RESET) + { + GPIOx->BSRRL = GPIO_Pin; + } + else + { + GPIOx->BSRRH = GPIO_Pin ; + } +} + +/** + * @brief Writes data to the specified GPIO data port. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @param PortVal: specifies the value to be written to the port output data + * register. + * @retval None + */ +void GPIO_Write(GPIO_TypeDef* GPIOx, uint16_t PortVal) +{ + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + + GPIOx->ODR = PortVal; +} + +/** + * @brief Toggles the specified GPIO pins.. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @param GPIO_Pin: Specifies the pins to be toggled. + * @retval None + */ +void GPIO_ToggleBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) +{ + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + + GPIOx->ODR ^= GPIO_Pin; +} + +/** + * @} + */ + +/** @defgroup GPIO_Group3 GPIO Alternate functions configuration functions + * @brief GPIO Alternate functions configuration functions + * +@verbatim + =============================================================================== + ##### GPIO Alternate functions configuration functions ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Changes the mapping of the specified pin. + * @param GPIOx: where x can be (A..H) to select the GPIO peripheral. + * @param GPIO_PinSource: specifies the pin for the Alternate function. + * This parameter can be GPIO_PinSourcex where x can be (0..15). + * @param GPIO_AFSelection: selects the pin to used as Alternat function. + * This parameter can be one of the following values: + * @arg GPIO_AF_RTC_50Hz: RTC 50/60 Hz synchronization + * @arg GPIO_AF_MCO: Microcontroller clock output + * @arg GPIO_AF_RTC_AF1: Time stamp, Tamper, Alarm A out, Alarm B out, + * 512 Hz clock output (with an LSE oscillator of 32.768 kHz) + * @arg GPIO_AF_WKUP: wakeup + * @arg GPIO_AF_SWJ: SWJ (SW and JTAG) + * @arg GPIO_AF_TRACE: Connect TRACE pins to AF0 (default after reset) + * @arg GPIO_AF_TIM2c: Connect TIM2 pins to AF1 + * @arg GPIO_AF_TIM3: Connect TIM3 pins to AF2 + * @arg GPIO_AF_TIM4: Connect TIM4 pins to AF2 + * @arg GPIO_AF_TIM5: Connect TIM5 pins to AF2 + * @arg GPIO_AF_TIM9: Connect TIM9 pins to AF3 + * @arg GPIO_AF_TIM10: Connect TIM10 pins to AF3 + * @arg GPIO_AF_TIM11: Connect TIM11 pins to AF3 + * @arg GPIO_AF_I2C1: Connect I2C1 pins to AF4 + * @arg GPIO_AF_I2C2: Connect I2C2 pins to AF4 + * @arg GPIO_AF_SPI1: Connect SPI1 pins to AF5 + * @arg GPIO_AF_SPI2: Connect SPI2/I2S2 pins to AF5 + * @arg GPIO_AF_SPI3: Connect SPI3/I2S3 pins to AF6 + * @arg GPIO_AF_USART1: Connect USART1 pins to AF7 + * @arg GPIO_AF_USART2: Connect USART2 pins to AF7 + * @arg GPIO_AF_USART3: Connect USART3 pins to AF7 + * @arg GPIO_AF_UART4: Connect UART4 pins to AF8 + * @arg GPIO_AF_UART5: Connect UART5 pins to AF8 + * @arg GPIO_AF_USB: Connect USB pins to AF10 + * @arg GPIO_AF_LCD: Connect LCD pins to AF11 + * @arg GPIO_AF_FSMC: Connect FSMC pins to AF12 + * @arg GPIO_AF_SDIO: Connect SDIO pins to AF12 + * @arg GPIO_AF_RI: Connect RI pins to AF14 + * @arg GPIO_AF_EVENTOUT: Cortex-M3 EVENTOUT signal + * @note The pin should already been configured in Alternate Function mode(AF) + * using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF + * @note Please refer to the Alternate function mapping table in the device + * datasheet for the detailed mapping of the system and peripherals' + * alternate function I/O pins. + * @note EVENTOUT is not mapped on PH0, PH1 and PH2. + * @retval None + */ +void GPIO_PinAFConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_PinSource, uint8_t GPIO_AF) +{ + uint32_t temp = 0x00; + uint32_t temp_2 = 0x00; + + /* Check the parameters */ + assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); + assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource)); + assert_param(IS_GPIO_AF(GPIO_AF)); + + temp = ((uint32_t)(GPIO_AF) << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4)) ; + GPIOx->AFR[GPIO_PinSource >> 0x03] &= ~((uint32_t)0xF << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4)) ; + temp_2 = GPIOx->AFR[GPIO_PinSource >> 0x03] | temp; + GPIOx->AFR[GPIO_PinSource >> 0x03] = temp_2; +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/