stm32f30x_exti.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32f30x_exti.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define EXTI_LINENONE     ((uint32_t)0x00000)        /* No interrupt selected */

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

void EXTI_DeInit(void)
{
  EXTI->IMR    = 0x1F800000;
  EXTI->EMR    = 0x00000000;
  EXTI->RTSR   = 0x00000000;
  EXTI->FTSR   = 0x00000000;
  EXTI->SWIER  = 0x00000000;
  EXTI->PR     = 0xE07FFFFF;
  EXTI->IMR2   = 0x0000000C;
  EXTI->EMR2   = 0x00000000;
  EXTI->RTSR2  = 0x00000000;
  EXTI->FTSR2  = 0x00000000;
  EXTI->SWIER2 = 0x00000000;
  EXTI->PR2    = 0x00000003;
}

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_ALL(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 */   
    *(__IO uint32_t *) (((uint32_t) &(EXTI->IMR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));   
    *(__IO uint32_t *) (((uint32_t) &(EXTI->EMR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
     
    tmp += EXTI_InitStruct->EXTI_Mode + (((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20);

    *(__IO uint32_t *) tmp |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
    
    tmp = (uint32_t)EXTI_BASE;

    /* Clear Rising Falling edge configuration */
    *(__IO uint32_t *) (((uint32_t) &(EXTI->RTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
    *(__IO uint32_t *) (((uint32_t) &(EXTI->FTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
    
      /* Select the trigger for the selected interrupts */
    if (EXTI_InitStruct->EXTI_Trigger == EXTI_Trigger_Rising_Falling)
    {
      /* Rising Falling edge */
    *(__IO uint32_t *) (((uint32_t) &(EXTI->RTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
    *(__IO uint32_t *) (((uint32_t) &(EXTI->FTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));      
    }
    else
    {
      tmp += EXTI_InitStruct->EXTI_Trigger + (((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20);

      *(__IO uint32_t *) tmp |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
    }
  }
      
  else
  {
    tmp += EXTI_InitStruct->EXTI_Mode + (((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20);

    /* Disable the selected external lines */
    *(__IO uint32_t *) tmp &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
  }
         
}

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_Rising_Falling;
  EXTI_InitStruct->EXTI_LineCmd = DISABLE;
}

void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line)
{
  /* Check the parameters */
  assert_param(IS_EXTI_LINE_EXT(EXTI_Line));

  *(__IO uint32_t *) (((uint32_t) &(EXTI->SWIER)) + ((EXTI_Line) >> 5 ) * 0x20) |= (uint32_t)(1 << (EXTI_Line & 0x1F));

}

FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line)
{
  FlagStatus bitstatus = RESET;
  
  /* Check the parameters */
  assert_param(IS_GET_EXTI_LINE(EXTI_Line));
   
  if ((*(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20)& (uint32_t)(1 << (EXTI_Line & 0x1F))) != (uint32_t)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

void EXTI_ClearFlag(uint32_t EXTI_Line)
{
  /* Check the parameters */
  assert_param(IS_EXTI_LINE_EXT(EXTI_Line));

  *(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20) = (1 << (EXTI_Line & 0x1F));  
}

ITStatus EXTI_GetITStatus(uint32_t EXTI_Line)
{
  ITStatus bitstatus = RESET;
  
  /* Check the parameters */
  assert_param(IS_GET_EXTI_LINE(EXTI_Line));
  
  if ((*(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20)& (uint32_t)(1 << (EXTI_Line & 0x1F))) != (uint32_t)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
  
}

void EXTI_ClearITPendingBit(uint32_t EXTI_Line)
{
  /* Check the parameters */
  assert_param(IS_EXTI_LINE_EXT(EXTI_Line));
  
  *(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20) = (1 << (EXTI_Line & 0x1F));
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/