From 1d3861ef93f8423176c6010ab606abdab00a7cbd Mon Sep 17 00:00:00 2001 From: bnewbold Date: Wed, 31 Mar 2010 08:52:45 +0800 Subject: Major hierarchy reorganization; see README. copy-to-ide and Makefile updated to conform; .gitignore added; LICENSE added --- stm32lib/src/stm32f10x_exti.c | 219 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 219 insertions(+) create mode 100644 stm32lib/src/stm32f10x_exti.c (limited to 'stm32lib/src/stm32f10x_exti.c') diff --git a/stm32lib/src/stm32f10x_exti.c b/stm32lib/src/stm32f10x_exti.c new file mode 100644 index 0000000..021a051 --- /dev/null +++ b/stm32lib/src/stm32f10x_exti.c @@ -0,0 +1,219 @@ +/******************** (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’s 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’s 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****/ -- cgit v1.2.3