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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [CORTEX_STM32F103_IAR/] [STM32F10xFWLib/] [src/] [stm32f10x_exti.c] - Rev 593
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/******************** (C) COPYRIGHT 2007 STMicroelectronics ******************** * File Name : stm32f10x_exti.c * Author : MCD Application Team * Date First Issued : 09/29/2006 * Description : This file provides all the EXTI firmware functions. ******************************************************************************** * History: * 04/02/2007: V0.2 * 02/05/2007: V0.1 * 09/29/2006: V0.01 ******************************************************************************** * THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. *******************************************************************************/ /* Includes ------------------------------------------------------------------*/ #include "stm32f10x_exti.h" /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define EXTI_LineNone ((u32)0x00000) /* No interrupt selected */ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /******************************************************************************* * Function Name : EXTI_DeInit * Description : Deinitializes the EXTI peripheral registers to their default * reset values. * Input : None * Output : None * Return : None *******************************************************************************/ void EXTI_DeInit(void) { EXTI->IMR = 0x00000000; EXTI->EMR = 0x00000000; EXTI->RTSR = 0x00000000; EXTI->FTSR = 0x00000000; EXTI->PR = 0x0007FFFF; } /******************************************************************************* * Function Name : EXTI_Init * Description : Initializes the EXTI peripheral according to the specified * parameters in the EXTI_InitStruct. * Input : - EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure * that contains the configuration information for the EXTI * peripheral. * Output : None * Return : None *******************************************************************************/ void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct) { /* Check the parameters */ assert(IS_EXTI_MODE(EXTI_InitStruct->EXTI_Mode)); assert(IS_EXTI_TRIGGER(EXTI_InitStruct->EXTI_Trigger)); assert(IS_EXTI_LINE(EXTI_InitStruct->EXTI_Line)); assert(IS_FUNCTIONAL_STATE(EXTI_InitStruct->EXTI_LineCmd)); if (EXTI_InitStruct->EXTI_LineCmd != DISABLE) { *(u32 *)(EXTI_BASE + (u32)EXTI_InitStruct->EXTI_Mode)|= EXTI_InitStruct->EXTI_Line; /* Clear Rising Falling edge configuration */ EXTI->RTSR &= ~EXTI_InitStruct->EXTI_Line; EXTI->FTSR &= ~EXTI_InitStruct->EXTI_Line; /* Select the trigger for the selected external interrupts */ if (EXTI_InitStruct->EXTI_Trigger == EXTI_Trigger_Rising_Falling) { /* Rising Falling edge */ EXTI->RTSR |= EXTI_InitStruct->EXTI_Line; EXTI->FTSR |= EXTI_InitStruct->EXTI_Line; } else { *(u32 *)(EXTI_BASE + (u32)EXTI_InitStruct->EXTI_Trigger)|= EXTI_InitStruct->EXTI_Line; } } else { /* Disable the selected external lines */ *(u32 *)(EXTI_BASE + (u32)EXTI_InitStruct->EXTI_Mode)&= ~EXTI_InitStruct->EXTI_Line; } } /******************************************************************************* * Function Name : EXTI_StructInit * Description : Fills each EXTI_InitStruct member with its reset value. * Input : - EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure * which will be initialized. * Output : None * Return : None *******************************************************************************/ void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct) { EXTI_InitStruct->EXTI_Line = EXTI_LineNone; EXTI_InitStruct->EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStruct->EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStruct->EXTI_LineCmd = DISABLE; } /******************************************************************************* * Function Name : EXTI_GenerateSWInterrupt * Description : Generates a Software interrupt. * Input : - EXTI_Line: specifies the EXTI lines to be enabled or * disabled. * This parameter can be: * - EXTI_Linex: External interrupt line x where x(0..18) * Output : None * Return : None *******************************************************************************/ void EXTI_GenerateSWInterrupt(u32 EXTI_Line) { /* Check the parameters */ assert(IS_EXTI_LINE(EXTI_Line)); EXTI->SWIER |= EXTI_Line; } /******************************************************************************* * Function Name : EXTI_GetFlagStatus * Description : Checks whether the specified EXTI line flag is set or not. * Input : - EXTI_Line: specifies the EXTI lines flag to check. * This parameter can be: * - EXTI_Linex: External interrupt line x where x(0..18) * Output : None * Return : The new state of EXTI_Line (SET or RESET). *******************************************************************************/ FlagStatus EXTI_GetFlagStatus(u32 EXTI_Line) { FlagStatus bitstatus = RESET; /* Check the parameters */ assert(IS_GET_EXTI_LINE(EXTI_Line)); if ((EXTI->PR & EXTI_Line) != (u32)RESET) { bitstatus = SET; } else { bitstatus = RESET; } return bitstatus; } /******************************************************************************* * Function Name : EXTI_ClearFlag * Description : Clears the EXTI’s line pending flags. * Input : - EXTI_Line: specifies the EXTI lines flags to clear. * This parameter can be: * - EXTI_Linex: External interrupt line x where x(0..18) * Output : None * Return : None *******************************************************************************/ void EXTI_ClearFlag(u32 EXTI_Line) { /* Check the parameters */ assert(IS_EXTI_LINE(EXTI_Line)); EXTI->PR = EXTI_Line; } /******************************************************************************* * Function Name : EXTI_GetITStatus * Description : Checks whether the specified EXTI line is asserted or not. * Input : - EXTI_Line: specifies the EXTI lines to check. * This parameter can be: * - EXTI_Linex: External interrupt line x where x(0..18) * Output : None * Return : The new state of EXTI_Line (SET or RESET). *******************************************************************************/ ITStatus EXTI_GetITStatus(u32 EXTI_Line) { ITStatus bitstatus = RESET; u32 enablestatus = 0; /* Check the parameters */ assert(IS_GET_EXTI_LINE(EXTI_Line)); enablestatus = EXTI->IMR & EXTI_Line; if (((EXTI->PR & EXTI_Line) != (u32)RESET) && enablestatus) { bitstatus = SET; } else { bitstatus = RESET; } return bitstatus; } /******************************************************************************* * Function Name : EXTI_ClearITPendingBit * Description : Clears the EXTI’s line pending bits. * Input : - EXTI_Line: specifies the EXTI lines to clear. * This parameter can be: * - EXTI_Linex: External interrupt line x where x(0..18) * Output : None * Return : None *******************************************************************************/ void EXTI_ClearITPendingBit(u32 EXTI_Line) { /* Check the parameters */ assert(IS_EXTI_LINE(EXTI_Line)); EXTI->PR = EXTI_Line; } /******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/
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