lpc17xx_exti.c

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/* Peripheral group ----------------------------------------------------------- */
/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_exti.h"

/* If this source file built with example, the LPC17xx FW library configuration
 * file in each example directory ("lpc17xx_libcfg.h") must be included,
 * otherwise the default FW library configuration file must be included instead
 */
#ifdef __BUILD_WITH_EXAMPLE__
#include "lpc17xx_libcfg.h"
#else
#include "lpc17xx_libcfg_default.h"
#endif /* __BUILD_WITH_EXAMPLE__ */


#ifdef _EXTI

/* Public Functions ----------------------------------------------------------- */
/*********************************************************************/
void EXTI_Init(void)
{
    LPC_SC->EXTINT = 0xF;
    LPC_SC->EXTMODE = 0x0;
    LPC_SC->EXTPOLAR = 0x0;
}


/*********************************************************************/
void    EXTI_DeInit(void)
{
    ;
}

/*********************************************************************/
void EXTI_Config(EXTI_InitTypeDef *EXTICfg)
{
    LPC_SC->EXTINT = 0x0;
    EXTI_SetMode(EXTICfg->EXTI_Line, EXTICfg->EXTI_Mode);
    EXTI_SetPolarity(EXTICfg->EXTI_Line, EXTICfg->EXTI_polarity);
}

/*********************************************************************/
void EXTI_SetMode(EXTI_LINE_ENUM EXTILine, EXTI_MODE_ENUM mode)
{
    if(mode == EXTI_MODE_EDGE_SENSITIVE)
    {
        LPC_SC->EXTMODE |= (1 << EXTILine);
    }
    else if(mode == EXTI_MODE_LEVEL_SENSITIVE)
    {
        LPC_SC->EXTMODE &= ~(1 << EXTILine);
    }
}

/*********************************************************************/
void EXTI_SetPolarity(EXTI_LINE_ENUM EXTILine, EXTI_POLARITY_ENUM polarity)
{
    if(polarity == EXTI_POLARITY_HIGH_ACTIVE_OR_RISING_EDGE)
    {
        LPC_SC->EXTPOLAR |= (1 << EXTILine);
    }
    else if(polarity == EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE)
    {
        LPC_SC->EXTPOLAR &= ~(1 << EXTILine);
    }
}

/*********************************************************************/
void EXTI_ClearEXTIFlag(EXTI_LINE_ENUM EXTILine)
{
        LPC_SC->EXTINT |= (1 << EXTILine);
}

#endif /* _EXTI */

/* --------------------------------- End Of File ------------------------------ */