lpc17xx_pinsel.c

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/***********************************************************************/
/* Peripheral group ----------------------------------------------------------- */
/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_pinsel.h"

/* Public Functions ----------------------------------------------------------- */

static void set_PinFunc ( uint8_t portnum, uint8_t pinnum, uint8_t funcnum);
static void set_ResistorMode ( uint8_t portnum, uint8_t pinnum, uint8_t modenum);
static void set_OpenDrainMode( uint8_t portnum, uint8_t pinnum, uint8_t modenum);

/*********************************************************************/
static void set_PinFunc ( uint8_t portnum, uint8_t pinnum, uint8_t funcnum)
{
    uint32_t pinnum_t = pinnum;
    uint32_t pinselreg_idx = 2 * portnum;
    uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINSEL0;

    if (pinnum_t >= 16) {
        pinnum_t -= 16;
        pinselreg_idx++;
    }
    *(uint32_t *)(pPinCon + pinselreg_idx) &= ~(0x03UL << (pinnum_t * 2));
    *(uint32_t *)(pPinCon + pinselreg_idx) |= ((uint32_t)funcnum) << (pinnum_t * 2);
}

/*********************************************************************/
void set_ResistorMode ( uint8_t portnum, uint8_t pinnum, uint8_t modenum)
{
    uint32_t pinnum_t = pinnum;
    uint32_t pinmodereg_idx = 2 * portnum;
    uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINMODE0;

    if (pinnum_t >= 16) {
        pinnum_t -= 16;
        pinmodereg_idx++ ;
    }

    *(uint32_t *)(pPinCon + pinmodereg_idx) &= ~(0x03UL << (pinnum_t * 2));
    *(uint32_t *)(pPinCon + pinmodereg_idx) |= ((uint32_t)modenum) << (pinnum_t * 2);
}

/*********************************************************************/
void set_OpenDrainMode( uint8_t portnum, uint8_t pinnum, uint8_t modenum)
{
    uint32_t *pPinCon = (uint32_t *)&LPC_PINCON->PINMODE_OD0;

    if (modenum == PINSEL_PINMODE_OPENDRAIN){
        *(uint32_t *)(pPinCon + portnum) |= (0x01UL << pinnum);
    } else {
        *(uint32_t *)(pPinCon + portnum) &= ~(0x01UL << pinnum);
    }
}

/* End of Public Functions ---------------------------------------------------- */

/* Public Functions ----------------------------------------------------------- */
/*********************************************************************/
void PINSEL_ConfigTraceFunc(FunctionalState NewState)
{
    if (NewState == ENABLE) {
        LPC_PINCON->PINSEL10 |= (0x01UL << 3);
    } else if (NewState == DISABLE) {
        LPC_PINCON->PINSEL10 &= ~(0x01UL << 3);
    }
}

/*********************************************************************/
void PINSEL_SetI2C0Pins(uint8_t i2cPinMode, FunctionalState filterSlewRateEnable)
{
    uint32_t regVal;

    if (i2cPinMode == PINSEL_I2C_Fast_Mode){
        regVal = PINSEL_I2CPADCFG_SCLDRV0 | PINSEL_I2CPADCFG_SDADRV0;
    }

    if (filterSlewRateEnable == DISABLE){
        regVal = PINSEL_I2CPADCFG_SCLI2C0 | PINSEL_I2CPADCFG_SDAI2C0;
    }
    LPC_PINCON->I2CPADCFG = regVal;
}


/*********************************************************************/
void PINSEL_ConfigPin(PINSEL_CFG_Type *PinCfg)
{
    set_PinFunc(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->Funcnum);
    set_ResistorMode(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->Pinmode);
    set_OpenDrainMode(PinCfg->Portnum, PinCfg->Pinnum, PinCfg->OpenDrain);
}


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