AMiRo-OS

/**

  ******************************************************************************

  * @file    stm32f10x_exti.c

  * @author  MCD Application Team

  * @version V3.5.0

  * @date    11-March-2011

  * @brief   This file provides all the EXTI firmware functions.

  ******************************************************************************

  * @attention

  *

  * 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>&copy; COPYRIGHT 2011 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 EXTI's 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 EXTI's 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 2011 STMicroelectronics *****END OF FILE****/