mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of mbed-src by
targets/cmsis/TARGET_STM/TARGET_DISCO_F051R8/stm32f0xx_gpio.c
- Committer:
- janekm
- Date:
- 2014-09-16
- Revision:
- 310:6188e0254baa
- Parent:
- 130:1dec54e4aec3
File content as of revision 310:6188e0254baa:
/** ****************************************************************************** * @file stm32f0xx_gpio.c * @author MCD Application Team * @version V1.3.0 * @date 16-January-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. For PortC, PortD and PortF, no configuration is needed. (+++) 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 PD0 and PD1, respectively, when the HSE oscillator is off. The HSE has 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 "stm32f0xx_gpio.h" #include "stm32f0xx_rcc.h" /** @addtogroup STM32F0xx_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. * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @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. * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @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) { 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)); /* 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_Level_2; GPIO_InitStruct->GPIO_OType = GPIO_OType_PP; GPIO_InitStruct->GPIO_PuPd = GPIO_PuPd_NOPULL; } /** * @brief Locks GPIO Pins configuration registers. * @note 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 device reset. * @param GPIOx: where x can be (A or B) 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_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. * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @param GPIO_Pin: specifies the port bit to read. * @note This parameter can be GPIO_Pin_x where x can be: * For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF. * For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF. * For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) 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. * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @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. * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @param GPIO_Pin: Specifies the port bit to read. * @note This parameter can be GPIO_Pin_x where x can be: * For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF. * For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF. * For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) 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. * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @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. * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @param GPIO_Pin: specifies the port bits to be written. * @note This parameter can be GPIO_Pin_x where x can be: * For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF. * For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF. * For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) 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. * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @param GPIO_Pin: specifies the port bits to be written. * @note This parameter can be GPIO_Pin_x where x can be: * For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF. * For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF. * For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) 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. * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @param GPIO_Pin: specifies the port bit to be written. * @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 * @note This parameter can be GPIO_Pin_x where x can be: * For STM32F051 and STM32F030: (0..15) for GPIOA, GPIOB, GPIOC, (2) for GPIOD and (0..1, 4..7) for GIIOF. * For STM32F072: (0..15) for GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, (0..10) for GPIOF. * For STM32F031: (0..15) for GPIOA, GPIOB, (13..15) for GPIOC and (0..1, 6..7) for GPIOF. * @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. * @note GPIOE is available only for STM32F072. * @note GPIOD is not available for STM32F031. * @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. * @note GPIOC, GPIOD, GPIOE and GPIOF are available only for STM32F072. * @param GPIO_PinSource: specifies the pin for the Alternate function. * This parameter can be GPIO_PinSourcex where x can be (0..15) for GPIOA, GPIOB, GPIOD, GPIOE * and (0..12) for GPIOC and (0, 2..5, 9..10) for GPIOF. * @param GPIO_AF: selects the pin to used as Alternate function. * This parameter can be one of the following value: * @arg GPIO_AF_0: WKUP, EVENTOUT, TIM15, SPI1, TIM17, MCO, SWDAT, SWCLK, * TIM14, BOOT, USART1, CEC, IR_OUT, SPI2, TIM3, USART4, * CAN, USART2, CRS, TIM16, TIM1, TS * @arg GPIO_AF_1: USART2, CEC, TIM3, USART1, USART2, EVENTOUT, I2C1, * I2C2, TIM15, SPI2, USART3, TS, SPI1 * @arg GPIO_AF_2: TIM2, TIM1, EVENTOUT, TIM16, TIM17, USB * @arg GPIO_AF_3: TS, I2C1, TIM15, EVENTOUT * @arg GPIO_AF_4: TIM14, USART4, USART3, CRS, CAN * @arg GPIO_AF_5: TIM16, TIM17, TIM15, SPI2, I2C2 * @arg GPIO_AF_6: EVENTOUT * @arg GPIO_AF_7: COMP1 OUT, COMP2 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****/