mbed library sources
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Diff: targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/stm32f30x_gpio.c
- Revision:
- 125:23cc3068a9e4
diff -r 73383cc04afd -r 23cc3068a9e4 targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/stm32f30x_gpio.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/stm32f30x_gpio.c Wed Mar 19 10:15:22 2014 +0000 @@ -0,0 +1,545 @@ +/** + ****************************************************************************** + * @file stm32f30x_gpio.c + * @author MCD Application Team + * @version V1.1.0 + * @date 27-February-2014 + * @brief This file provides firmware functions to manage the following + * functionalities of the GPIO peripheral: + * + Initialization and Configuration functions + * + GPIO Read and Write functions + * + GPIO Alternate functions configuration functions + * + * @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: Low, Medium, Fast 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 + (PF0 and PF1 respectively) when the HSE oscillator is off. The HSE has + the priority over the GPIO function. + + @endverbatim + + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT(c) 2014 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 "stm32f30x_gpio.h" +#include "stm32f30x_rcc.h" + +/** @addtogroup STM32F30x_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. + * @param GPIOx: where x can be (A, B, C, D, E or F) 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); + } + } +} + +/** + * @brief Initializes the GPIOx peripheral according to the specified + * parameters in the GPIO_InitStruct. + * @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral. + * @param GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that + * contains the configuration information for the specified GPIO + * peripheral. + * @note GPIO_Pin: selects the pin to be configured: + * GPIO_Pin_0->GPIO_Pin_15 for GPIOA, GPIOB, GPIOC, GPIOD and GPIOE; + * GPIO_Pin_0->GPIO_Pin_2, GPIO_Pin_4, GPIO_Pin_6, GPIO_Pin_9 + * and GPIO_Pin_10 for GPIOF. + * @retval None + */ +void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct) +{ + uint32_t pinpos = 0x00, pos = 0x00 , currentpin = 0x00; + uint32_t tmpreg = 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) + { + 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)); + } + + GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (pinpos * 2)); + + GPIOx->MODER |= (((uint32_t)GPIO_InitStruct->GPIO_Mode) << (pinpos * 2)); + + /* Use temporary variable to update PUPDR register configuration, to avoid + unexpected transition in the GPIO pin configuration. */ + tmpreg = GPIOx->PUPDR; + tmpreg &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)pinpos * 2)); + tmpreg |= (((uint32_t)GPIO_InitStruct->GPIO_PuPd) << (pinpos * 2)); + GPIOx->PUPDR = tmpreg; + } + } +} + +/** + * @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_2MHz; + 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. + * @note The configuration of the locked GPIO pins can no longer be modified + * until the next reset. + * @param GPIOx: where x can be (A or B or D) 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) +{ + uint32_t tmp = 0x00010000; + + /* Check the parameters */ + assert_param(IS_GPIO_LIST_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, B, C, D, E or F) to select the GPIO peripheral. + * @param GPIO_Pin: specifies the port bit to read. + * @note This parameter can be GPIO_Pin_x where x can be : + * (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE; + * (0..2, 4, 6, 9..10) for GPIOF. + * @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 input port pin. + * @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral. + * @retval The input port pin 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, B, C, D, E or F) to select the GPIO peripheral. + * @param GPIO_Pin: Specifies the port bit to read. + * @note This parameter can be GPIO_Pin_x where x can be : + * (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE; + * (0..2, 4, 6, 9..10) for GPIOF. + * @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, B, C, D, E or F) 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, B, C, D, E or F) to select the GPIO peripheral. + * @param GPIO_Pin: specifies the port bits to be written. + * @note This parameter can be GPIO_Pin_x where x can be : + * (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE; + * (0..2, 4, 6, 9..10) for GPIOF. + * @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->BSRR = GPIO_Pin; +} + +/** + * @brief Clears the selected data port bits. + * @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral. + * @param GPIO_Pin: specifies the port bits to be written. + * @note This parameter can be GPIO_Pin_x where x can be : + * (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE; + * (0..2, 4, 6, 9..10) for GPIOF. + * @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->BRR = GPIO_Pin; +} + +/** + * @brief Sets or clears the selected data port bit. + * @param GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral. + * @param GPIO_Pin: specifies the port bit to be written. + * @note This parameter can be GPIO_Pin_x where x can be : + * (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE; + * (0..2, 4, 6, 9..10) for GPIOF. + * @param BitVal: specifies the value to be written to the selected bit. + * This parameter can be one of the BitAction enumeration 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->BSRR = GPIO_Pin; + } + else + { + GPIOx->BRR = GPIO_Pin ; + } +} + +/** + * @brief Writes data to the specified GPIO data port. + * @param GPIOx: where x can be (A, B, C, D, E or F) 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; +} + +/** + * @} + */ + +/** @defgroup GPIO_Group3 GPIO Alternate functions configuration functions + * @brief GPIO Alternate functions configuration functions + * +@verbatim + =============================================================================== + ##### GPIO Alternate functions configuration functions ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Writes data to the specified GPIO data port. + * @param GPIOx: where x can be (A, B, C, D, E or F) 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_AF: selects the pin to be used as Alternate function. + * This parameter can be one of the following value: + * @arg GPIO_AF_0: JTCK-SWCLK, JTDI, JTDO/TRACESW0, JTMS-SWDAT, MCO, NJTRST, + * TRACED, TRACECK. + * @arg GPIO_AF_1: OUT, TIM2, TIM15, TIM16, TIM17. + * @arg GPIO_AF_2: COMP1_OUT, TIM1, TIM2, TIM3, TIM4, TIM8, TIM15, TIM16. + * @arg GPIO_AF_3: COMP7_OUT, TIM8, TIM15, Touch, HRTIM. + * @arg GPIO_AF_4: I2C1, I2C2, TIM1, TIM8, TIM16, TIM17. + * @arg GPIO_AF_5: IR_OUT, I2S2, I2S3, SPI1, SPI2, TIM8, USART4, USART5 + * @arg GPIO_AF_6: IR_OUT, I2S2, I2S3, SPI2, SPI3, TIM1, TIM8 + * @arg GPIO_AF_7: AOP2_OUT, CAN, COMP3_OUT, COMP5_OUT, COMP6_OUT, USART1, + * USART2, USART3. + * @arg GPIO_AF_8: COMP1_OUT, COMP2_OUT, COMP3_OUT, COMP4_OUT, COMP5_OUT, + * COMP6_OUT. + * @arg GPIO_AF_9: AOP4_OUT, CAN, TIM1, TIM8, TIM15. + * @arg GPIO_AF_10: AOP1_OUT, AOP3_OUT, TIM2, TIM3, TIM4, TIM8, TIM17. + * @arg GPIO_AF_11: TIM1, TIM8. + * @arg GPIO_AF_12: TIM1, HRTIM. + * @arg GPIO_AF_13: HRTIM, AOP2_OUT. + * @arg GPIO_AF_14: USBDM, USBDP. + * @arg GPIO_AF_15: OUT. + * @note The pin should already been configured in Alternate Function mode(AF) + * using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF + * @note 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. + * @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****/