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jeremybenn |
/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
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* File Name : 75x_extit.c
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* Author : MCD Application Team
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* Date First Issued : 03/10/2006
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* Description : This file provides all the EXTIT software functions.
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********************************************************************************
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* History:
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* 07/17/2006 : V1.0
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* 03/10/2006 : V0.1
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********************************************************************************
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* THE PRESENT SOFTWARE 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 TIME.
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* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "75x_extit.h"
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#include "75x_mrcc.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/*******************************************************************************
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* Function Name : EXTIT_DeInit
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* Description : Deinitializes the EXTIT peripheral registers to their default
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* reset values.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void EXTIT_DeInit(void)
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{
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MRCC_PeripheralSWResetConfig(MRCC_Peripheral_EXTIT,ENABLE);
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MRCC_PeripheralSWResetConfig(MRCC_Peripheral_EXTIT,DISABLE);
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}
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/*******************************************************************************
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* Function Name : EXTIT_Init
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* Description : Initializes the EXTIT peripheral according to the specified
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* parameters in the EXTIT_InitStruct .
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* Input : - EXTIT_InitStruct: pointer to a EXTIT_InitTypeDef structure
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* that contains the configuration information for the EXTIT
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* peripheral.
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* Output : None
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* Return : None
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*******************************************************************************/
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void EXTIT_Init(EXTIT_InitTypeDef* EXTIT_InitStruct)
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{
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if(EXTIT_InitStruct->EXTIT_ITLineCmd == ENABLE)
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{
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/* Enable the selected external interrupts */
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EXTIT->MR |= EXTIT_InitStruct->EXTIT_ITLine;
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/* Select the trigger for the selected external interrupts */
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if(EXTIT_InitStruct->EXTIT_ITTrigger == EXTIT_ITTrigger_Falling)
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{
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/* Falling edge */
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EXTIT->TSR &= ~EXTIT_InitStruct->EXTIT_ITLine;
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}
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else if (EXTIT_InitStruct->EXTIT_ITTrigger == EXTIT_ITTrigger_Rising)
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{
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/* Rising edge */
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EXTIT->TSR |= EXTIT_InitStruct->EXTIT_ITLine;
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}
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}
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else if(EXTIT_InitStruct->EXTIT_ITLineCmd == DISABLE)
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{
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/* Disable the selected external interrupts */
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EXTIT->MR &= ~EXTIT_InitStruct->EXTIT_ITLine;
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}
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}
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/*******************************************************************************
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* Function Name : EXTIT_StructInit
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* Description : Fills each EXTIT_InitStruct member with its reset value.
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* Input : - EXTIT_InitStruct: pointer to a EXTIT_InitTypeDef structure
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* which will be initialized.
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* Output : None
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* Return : None
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*******************************************************************************/
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void EXTIT_StructInit(EXTIT_InitTypeDef* EXTIT_InitStruct)
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{
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EXTIT_InitStruct->EXTIT_ITLine = EXTIT_ITLineNone;
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EXTIT_InitStruct->EXTIT_ITTrigger = EXTIT_ITTrigger_Falling;
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EXTIT_InitStruct->EXTIT_ITLineCmd = DISABLE;
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}
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/*******************************************************************************
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* Function Name : EXTIT_GenerateSWInterrupt
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* Description : Generates a Software interrupt.
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* Input : - EXTIT_ITLine: specifies the EXTIT lines to be enabled or
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* disabled. This parameter can be:
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* - EXTIT_ITLinex: External interrupt line x where x(0..15)
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* Output : None
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* Return : None
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*******************************************************************************/
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void EXTIT_GenerateSWInterrupt(u16 EXTIT_ITLine)
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{
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EXTIT->SWIR |= EXTIT_ITLine;
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}
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/*******************************************************************************
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* Function Name : EXTIT_GetFlagStatus
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* Description : Checks whether the specified EXTIT line flag is set or not.
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* Input : - EXTIT_ITLine: specifies the EXTIT lines flag to check.
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* This parameter can be:
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* - EXTIT_ITLinex: External interrupt line x where x(0..15)
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* Output : None
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* Return : The new state of EXTIT_ITLine (SET or RESET).
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*******************************************************************************/
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FlagStatus EXTIT_GetFlagStatus(u16 EXTIT_ITLine)
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{
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if((EXTIT->PR & EXTIT_ITLine) != RESET)
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{
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return SET;
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}
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else
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{
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return RESET;
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}
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}
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/*******************************************************************************
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* Function Name : EXTIT_ClearFlag
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* Description : Clears the EXTIT’s line pending flags.
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* Input : - EXTIT_ITLine: specifies the EXTIT lines flags to clear.
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* This parameter can be:
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* - EXTIT_ITLinex: External interrupt line x where x(0..15)
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* Output : None
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* Return : None
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*******************************************************************************/
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void EXTIT_ClearFlag(u16 EXTIT_ITLine)
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{
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EXTIT->PR = EXTIT_ITLine;
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}
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/*******************************************************************************
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* Function Name : EXTIT_GetITStatus
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* Description : Checks whether the specified EXTIT line is asserted or not.
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* Input : - EXTIT_ITLine: specifies the EXTIT lines to check.
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* This parameter can be:
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* - EXTIT_ITLinex: External interrupt line x where x(0..15)
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* Output : None
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* Return : The new state of EXTIT_ITLine (SET or RESET).
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*******************************************************************************/
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ITStatus EXTIT_GetITStatus(u16 EXTIT_ITLine)
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{
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if(((EXTIT->PR & EXTIT_ITLine) != RESET)&& ((EXTIT->MR & EXTIT_ITLine) != RESET))
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{
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return SET;
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}
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else
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{
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return RESET;
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}
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}
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/*******************************************************************************
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* Function Name : EXTIT_ClearITPendingBit
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* Description : Clears the EXTIT’s line pending bits.
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* Input : - EXTIT_ITLine: specifies the EXTIT lines to clear.
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* This parameter can be:
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* - EXTIT_ITLinex: External interrupt line x where x(0..15)
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* Output : None
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* Return : None
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*******************************************************************************/
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void EXTIT_ClearITPendingBit(u16 EXTIT_ITLine)
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{
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EXTIT->PR = EXTIT_ITLine;
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}
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/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/
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