- /******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
- * File Name : stm32f10x_exti.c
- * Author : MCD Application Team
- * Version : V2.0.2
- * Date : 07/11/2008
- * Description : This file provides all the EXTI firmware functions.
- ********************************************************************************
- * 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.
- *******************************************************************************/
- /* 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_param(IS_EXTI_MODE(EXTI_InitStruct->EXTI_Mode));
- assert_param(IS_EXTI_TRIGGER(EXTI_InitStruct->EXTI_Trigger));
- assert_param(IS_EXTI_LINE(EXTI_InitStruct->EXTI_Line));
- assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->EXTI_LineCmd));
- if (EXTI_InitStruct->EXTI_LineCmd != DISABLE)
- {
- /* Clear EXTI line configuration */
- EXTI->IMR &= ~EXTI_InitStruct->EXTI_Line;
- EXTI->EMR &= ~EXTI_InitStruct->EXTI_Line;
- *(vu32 *)(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
- {
- *(vu32 *)(EXTI_BASE + (u32)EXTI_InitStruct->EXTI_Trigger)|= EXTI_InitStruct->EXTI_Line;
- }
- }
- else
- {
- /* Disable the selected external lines */
- *(vu32 *)(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 any combination of EXTI_Linex where
- * x can be (0..18).
- * Output : None
- * Return : None
- *******************************************************************************/
- void EXTI_GenerateSWInterrupt(u32 EXTI_Line)
- {
- /* Check the parameters */
- assert_param(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 line 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_param(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抯 line pending flags.
- * Input : - EXTI_Line: specifies the EXTI lines flags to clear.
- * This parameter can be any combination of EXTI_Linex where
- * x can be (0..18).
- * Output : None
- * Return : None
- *******************************************************************************/
- void EXTI_ClearFlag(u32 EXTI_Line)
- {
- /* Check the parameters */
- assert_param(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 line 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_param(IS_GET_EXTI_LINE(EXTI_Line));
- enablestatus = EXTI->IMR & EXTI_Line;
- if (((EXTI->PR & EXTI_Line) != (u32)RESET) && (enablestatus != (u32)RESET))
- {
- bitstatus = SET;
- }
- else
- {
- bitstatus = RESET;
- }
- return bitstatus;
- }
- /*******************************************************************************
- * Function Name : EXTI_ClearITPendingBit
- * Description : Clears the EXTI抯 line pending bits.
- * Input : - EXTI_Line: specifies the EXTI lines to clear.
- * This parameter can be any combination of EXTI_Linex where
- * x can be (0..18).
- * Output : None
- * Return : None
- *******************************************************************************/
- void EXTI_ClearITPendingBit(u32 EXTI_Line)
- {
- /* Check the parameters */
- assert_param(IS_EXTI_LINE(EXTI_Line));
- EXTI->PR = EXTI_Line;
- }
- /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/