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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [CORTEX_STM32L152_IAR/] [system_and_ST_code/] [STM32L1xx_StdPeriph_Driver/] [src/] [stm32l1xx_gpio.c] - Rev 582
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/** ****************************************************************************** * @file stm32l1xx_gpio.c * @author MCD Application Team * @version V1.0.0RC1 * @date 07/02/2010 * @brief This file provides all the GPIO firmware functions. ****************************************************************************** * @copy * * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. * * <h2><center>© COPYRIGHT 2010 STMicroelectronics</center></h2> */ /* Includes ------------------------------------------------------------------*/ #include "stm32l1xx_gpio.h" #include "stm32l1xx_rcc.h" /** @addtogroup STM32L1xx_StdPeriph_Driver * @{ */ /** @defgroup GPIO * @brief GPIO driver modules * @{ */ /** @defgroup GPIO_Private_TypesDefinitions * @{ */ /** * @} */ /** @defgroup GPIO_Private_Defines * @{ */ /** * @} */ /** @defgroup GPIO_Private_Macros * @{ */ /** * @} */ /** @defgroup GPIO_Private_Variables * @{ */ /** * @} */ /** @defgroup GPIO_Private_FunctionPrototypes * @{ */ /** * @} */ /** @defgroup GPIO_Private_Functions * @{ */ /** * @brief Deinitializes the GPIOx peripheral registers to their default reset * values. * @param GPIOx: where x can be (A, B, C, D, E or 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 == 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, B, C, D, E or 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 configuartion*/ 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 Reads the specified input port pin. * @param GPIOx: where x can be (A, B, C, D, E or 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, B, C, D, E or 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, B, C, D, E or 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, B, C, D, E or 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, B, C, D, E or 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). * @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, B, C, D, E or 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). * @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, B, C, D, E or 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, B, C, D, E or 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 Locks GPIO Pins configuration registers. * @param GPIOx: where x can be (A, B, C, D, E or 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) { 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; } /** * @brief Changes the mapping of the specified pin. * @param GPIOx: where x can be (A, B, C, D, E or 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 * @arg GPIO_AF_MCO * @arg GPIO_AF_TAMPER * @arg GPIO_AF_WKUP * @arg GPIO_AF_SWJ * @arg GPIO_AF_TRACE * @arg GPIO_AF_TIMESTAMP * @arg GPIO_AF_CALIB * @arg GPIO_AF_TIM2 * @arg GPIO_AF_TIM3 * @arg GPIO_AF_TIM4 * @arg GPIO_AF_TIM9 * @arg GPIO_AF_TIM10 * @arg GPIO_AF_TIM11 * @arg GPIO_AF_I2C1 * @arg GPIO_AF_I2C2 * @arg GPIO_AF_SPI1 * @arg GPIO_AF_SPI2 * @arg GPIO_AF_USART1 * @arg GPIO_AF_USART2 * @arg GPIO_AF_USART3 * @arg GPIO_AF_USB * @arg GPIO_AF_LCD * @arg GPIO_AF_RI * @arg GPIO_AF_EVENTOUT * @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 2010 STMicroelectronics *****END OF FILE****/