www.pudn.com > 2.4G_eth_ok_1226.rar > stm32f10x_exti.c, change:2010-04-23,size:6852b


/** 
  ****************************************************************************** 
  * @file    stm32f10x_exti.c 
  * @author  MCD Application Team 
  * @version V3.3.0 
  * @date    04/16/2010 
  * @brief   This file provides all the EXTI firmware functions. 
  ****************************************************************************** 
  * @copy 
  * 
  * 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. 
  * 
  * <h2><center>© COPYRIGHT 2010 STMicroelectronics</center></h2> 
  */  
 
/* Includes ------------------------------------------------------------------*/ 
#include "stm32f10x_exti.h" 
 
/** @addtogroup STM32F10x_StdPeriph_Driver 
  * @{ 
  */ 
 
/** @defgroup EXTI  
  * @brief EXTI driver modules 
  * @{ 
  */ 
 
/** @defgroup EXTI_Private_TypesDefinitions 
  * @{ 
  */ 
 
/** 
  * @} 
  */ 
 
/** @defgroup EXTI_Private_Defines 
  * @{ 
  */ 
 
#define EXTI_LineNone    ((uint32_t)0x00000)  /* No interrupt selected */ 
 
/** 
  * @} 
  */ 
 
/** @defgroup EXTI_Private_Macros 
  * @{ 
  */ 
 
/** 
  * @} 
  */ 
 
/** @defgroup EXTI_Private_Variables 
  * @{ 
  */ 
 
/** 
  * @} 
  */ 
 
/** @defgroup EXTI_Private_FunctionPrototypes 
  * @{ 
  */ 
 
/** 
  * @} 
  */ 
 
/** @defgroup EXTI_Private_Functions 
  * @{ 
  */ 
 
/** 
  * @brief  Deinitializes the EXTI peripheral registers to their default reset values. 
  * @param  None 
  * @retval None 
  */ 
void EXTI_DeInit(void) 
{ 
  EXTI->IMR = 0x00000000; 
  EXTI->EMR = 0x00000000; 
  EXTI->RTSR = 0x00000000;  
  EXTI->FTSR = 0x00000000;  
  EXTI->PR = 0x000FFFFF; 
} 
 
/** 
  * @brief  Initializes the EXTI peripheral according to the specified 
  *   parameters in the EXTI_InitStruct. 
  * @param  EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure 
  *   that contains the configuration information for the EXTI peripheral. 
  * @retval None 
  */ 
void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct) 
{ 
  uint32_t tmp = 0; 
 
  /* 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)); 
 
  tmp = (uint32_t)EXTI_BASE; 
      
  if (EXTI_InitStruct->EXTI_LineCmd != DISABLE) 
  { 
    /* Clear EXTI line configuration */ 
    EXTI->IMR &= ~EXTI_InitStruct->EXTI_Line; 
    EXTI->EMR &= ~EXTI_InitStruct->EXTI_Line; 
     
    tmp += EXTI_InitStruct->EXTI_Mode; 
 
    *(__IO uint32_t *) tmp |= 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 
    { 
      tmp = (uint32_t)EXTI_BASE; 
      tmp += EXTI_InitStruct->EXTI_Trigger; 
 
      *(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line; 
    } 
  } 
  else 
  { 
    tmp += EXTI_InitStruct->EXTI_Mode; 
 
    /* Disable the selected external lines */ 
    *(__IO uint32_t *) tmp &= ~EXTI_InitStruct->EXTI_Line; 
  } 
} 
 
/** 
  * @brief  Fills each EXTI_InitStruct member with its reset value. 
  * @param  EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure which will 
  *   be initialized. 
  * @retval 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; 
} 
 
/** 
  * @brief  Generates a Software interrupt. 
  * @param  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..19). 
  * @retval None 
  */ 
void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line) 
{ 
  /* Check the parameters */ 
  assert_param(IS_EXTI_LINE(EXTI_Line)); 
   
  EXTI->SWIER |= EXTI_Line; 
} 
 
/** 
  * @brief  Checks whether the specified EXTI line flag is set or not. 
  * @param  EXTI_Line: specifies the EXTI line flag to check. 
  *   This parameter can be: 
  *     @arg EXTI_Linex: External interrupt line x where x(0..19) 
  * @retval The new state of EXTI_Line (SET or RESET). 
  */ 
FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line) 
{ 
  FlagStatus bitstatus = RESET; 
  /* Check the parameters */ 
  assert_param(IS_GET_EXTI_LINE(EXTI_Line)); 
   
  if ((EXTI->PR & EXTI_Line) != (uint32_t)RESET) 
  { 
    bitstatus = SET; 
  } 
  else 
  { 
    bitstatus = RESET; 
  } 
  return bitstatus; 
} 
 
/** 
  * @brief  Clears the EXTIís line pending flags. 
  * @param  EXTI_Line: specifies the EXTI lines flags to clear. 
  *   This parameter can be any combination of EXTI_Linex where x can be (0..19). 
  * @retval None 
  */ 
void EXTI_ClearFlag(uint32_t EXTI_Line) 
{ 
  /* Check the parameters */ 
  assert_param(IS_EXTI_LINE(EXTI_Line)); 
   
  EXTI->PR = EXTI_Line; 
} 
 
/** 
  * @brief  Checks whether the specified EXTI line is asserted or not. 
  * @param  EXTI_Line: specifies the EXTI line to check. 
  *   This parameter can be: 
  *     @arg EXTI_Linex: External interrupt line x where x(0..19) 
  * @retval The new state of EXTI_Line (SET or RESET). 
  */ 
ITStatus EXTI_GetITStatus(uint32_t EXTI_Line) 
{ 
  ITStatus bitstatus = RESET; 
  uint32_t enablestatus = 0; 
  /* Check the parameters */ 
  assert_param(IS_GET_EXTI_LINE(EXTI_Line)); 
   
  enablestatus =  EXTI->IMR & EXTI_Line; 
  if (((EXTI->PR & EXTI_Line) != (uint32_t)RESET) && (enablestatus != (uint32_t)RESET)) 
  { 
    bitstatus = SET; 
  } 
  else 
  { 
    bitstatus = RESET; 
  } 
  return bitstatus; 
} 
 
/** 
  * @brief  Clears the EXTIís line pending bits. 
  * @param  EXTI_Line: specifies the EXTI lines to clear. 
  *   This parameter can be any combination of EXTI_Linex where x can be (0..19). 
  * @retval None 
  */ 
void EXTI_ClearITPendingBit(uint32_t EXTI_Line) 
{ 
  /* Check the parameters */ 
  assert_param(IS_EXTI_LINE(EXTI_Line)); 
   
  EXTI->PR = EXTI_Line; 
} 
 
/** 
  * @} 
  */ 
 
/** 
  * @} 
  */ 
 
/** 
  * @} 
  */ 
 
/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/