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/** |
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****************************************************************************** |
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* @file stm32f10x_exti.c |
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* @author MCD Application Team |
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* @version V3.1.0 |
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* @date 06/19/2009 |
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* @brief This file provides all the EXTI firmware functions. |
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****************************************************************************** |
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* @copy |
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* |
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE |
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* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY |
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* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING |
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* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE |
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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* |
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* <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2> |
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*/ |
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/* Includes ------------------------------------------------------------------*/ |
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#include "stm32f10x_exti.h" |
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/** @addtogroup STM32F10x_StdPeriph_Driver |
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* @{ |
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*/ |
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/** @defgroup EXTI |
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* @brief EXTI driver modules |
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* @{ |
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*/ |
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/** @defgroup EXTI_Private_TypesDefinitions |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup EXTI_Private_Defines |
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* @{ |
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*/ |
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#define EXTI_LineNone ((uint32_t)0x00000) /* No interrupt selected */ |
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/** |
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* @} |
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*/ |
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/** @defgroup EXTI_Private_Macros |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup EXTI_Private_Variables |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup EXTI_Private_FunctionPrototypes |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup EXTI_Private_Functions |
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* @{ |
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*/ |
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/** |
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* @brief Deinitializes the EXTI peripheral registers to their default reset values. |
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* @param None |
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* @retval None |
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*/ |
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void EXTI_DeInit(void) |
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{ |
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EXTI->IMR = 0x00000000; |
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EXTI->EMR = 0x00000000; |
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EXTI->RTSR = 0x00000000; |
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EXTI->FTSR = 0x00000000; |
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EXTI->PR = 0x000FFFFF; |
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} |
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/** |
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* @brief Initializes the EXTI peripheral according to the specified |
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* parameters in the EXTI_InitStruct. |
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* @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure |
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* that contains the configuration information for the EXTI peripheral. |
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* @retval None |
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*/ |
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void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct) |
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{ |
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uint32_t tmp = 0; |
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/* Check the parameters */ |
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assert_param(IS_EXTI_MODE(EXTI_InitStruct->EXTI_Mode)); |
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assert_param(IS_EXTI_TRIGGER(EXTI_InitStruct->EXTI_Trigger)); |
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assert_param(IS_EXTI_LINE(EXTI_InitStruct->EXTI_Line)); |
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assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->EXTI_LineCmd)); |
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tmp = (uint32_t)EXTI_BASE; |
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if (EXTI_InitStruct->EXTI_LineCmd != DISABLE) |
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{ |
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/* Clear EXTI line configuration */ |
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EXTI->IMR &= ~EXTI_InitStruct->EXTI_Line; |
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EXTI->EMR &= ~EXTI_InitStruct->EXTI_Line; |
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tmp += EXTI_InitStruct->EXTI_Mode; |
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*(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line; |
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/* Clear Rising Falling edge configuration */ |
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EXTI->RTSR &= ~EXTI_InitStruct->EXTI_Line; |
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EXTI->FTSR &= ~EXTI_InitStruct->EXTI_Line; |
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/* Select the trigger for the selected external interrupts */ |
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if (EXTI_InitStruct->EXTI_Trigger == EXTI_Trigger_Rising_Falling) |
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{ |
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/* Rising Falling edge */ |
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EXTI->RTSR |= EXTI_InitStruct->EXTI_Line; |
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EXTI->FTSR |= EXTI_InitStruct->EXTI_Line; |
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} |
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else |
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{ |
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tmp = (uint32_t)EXTI_BASE; |
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tmp += EXTI_InitStruct->EXTI_Trigger; |
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*(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line; |
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} |
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} |
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else |
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{ |
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tmp += EXTI_InitStruct->EXTI_Mode; |
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/* Disable the selected external lines */ |
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*(__IO uint32_t *) tmp &= ~EXTI_InitStruct->EXTI_Line; |
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} |
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} |
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/** |
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* @brief Fills each EXTI_InitStruct member with its reset value. |
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* @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure which will |
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* be initialized. |
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* @retval None |
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*/ |
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void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct) |
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{ |
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EXTI_InitStruct->EXTI_Line = EXTI_LineNone; |
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EXTI_InitStruct->EXTI_Mode = EXTI_Mode_Interrupt; |
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EXTI_InitStruct->EXTI_Trigger = EXTI_Trigger_Falling; |
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EXTI_InitStruct->EXTI_LineCmd = DISABLE; |
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} |
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/** |
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* @brief Generates a Software interrupt. |
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* @param EXTI_Line: specifies the EXTI lines to be enabled or disabled. |
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* This parameter can be any combination of EXTI_Linex where x can be (0..19). |
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* @retval None |
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*/ |
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void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_EXTI_LINE(EXTI_Line)); |
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EXTI->SWIER |= EXTI_Line; |
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} |
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/** |
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* @brief Checks whether the specified EXTI line flag is set or not. |
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* @param EXTI_Line: specifies the EXTI line flag to check. |
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* This parameter can be: |
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* @arg EXTI_Linex: External interrupt line x where x(0..19) |
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* @retval The new state of EXTI_Line (SET or RESET). |
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*/ |
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FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line) |
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{ |
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FlagStatus bitstatus = RESET; |
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/* Check the parameters */ |
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assert_param(IS_GET_EXTI_LINE(EXTI_Line)); |
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if ((EXTI->PR & EXTI_Line) != (uint32_t)RESET) |
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{ |
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bitstatus = SET; |
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} |
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else |
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{ |
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bitstatus = RESET; |
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} |
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return bitstatus; |
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} |
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/** |
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* @brief Clears the EXTIs line pending flags. |
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* @param EXTI_Line: specifies the EXTI lines flags to clear. |
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* This parameter can be any combination of EXTI_Linex where x can be (0..19). |
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* @retval None |
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*/ |
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void EXTI_ClearFlag(uint32_t EXTI_Line) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_EXTI_LINE(EXTI_Line)); |
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EXTI->PR = EXTI_Line; |
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} |
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/** |
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* @brief Checks whether the specified EXTI line is asserted or not. |
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* @param EXTI_Line: specifies the EXTI line to check. |
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* This parameter can be: |
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* @arg EXTI_Linex: External interrupt line x where x(0..19) |
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* @retval The new state of EXTI_Line (SET or RESET). |
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*/ |
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ITStatus EXTI_GetITStatus(uint32_t EXTI_Line) |
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{ |
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ITStatus bitstatus = RESET; |
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uint32_t enablestatus = 0; |
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/* Check the parameters */ |
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assert_param(IS_GET_EXTI_LINE(EXTI_Line)); |
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enablestatus = EXTI->IMR & EXTI_Line; |
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if (((EXTI->PR & EXTI_Line) != (uint32_t)RESET) && (enablestatus != (uint32_t)RESET)) |
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{ |
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bitstatus = SET; |
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} |
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else |
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{ |
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bitstatus = RESET; |
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} |
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return bitstatus; |
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} |
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/** |
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* @brief Clears the EXTIs line pending bits. |
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* @param EXTI_Line: specifies the EXTI lines to clear. |
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* This parameter can be any combination of EXTI_Linex where x can be (0..19). |
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* @retval None |
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*/ |
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void EXTI_ClearITPendingBit(uint32_t EXTI_Line) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_EXTI_LINE(EXTI_Line)); |
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EXTI->PR = EXTI_Line; |
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} |
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/** |
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* @} |
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*/ |
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/** |
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* @} |
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*/ |
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/** |
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* @} |
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*/ |
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/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/ |