File content as of revision 0:d920d64db582:

/***********************************************************************//**
 * @file        lpc17xx_pinsel.c
 * @brief        Contains all functions support for Pin connect block firmware
 *                 library on LPC17xx
 * @version        2.0
 * @date        21. May. 2010
 * @author        NXP MCU SW Application Team
 **************************************************************************
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * products. This software is supplied "AS IS" without any warranties.
 * NXP Semiconductors assumes no responsibility or liability for the
 * use of the software, conveys no license or title under any patent,
 * copyright, or mask work right to the product. NXP Semiconductors
 * reserves the right to make changes in the software without
 * notification. NXP Semiconductors also make no representation or
 * warranty that such application will be suitable for the specified
 * use without further testing or modification.
 **********************************************************************/

/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup PINSEL
 * @{
 */

/* 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);

/*********************************************************************//**
 * @brief         Setup the pin selection function
 * @param[in]    portnum PORT number,
 *                 should be one of the following:
 *                 - PINSEL_PORT_0    : Port 0
 *                 - PINSEL_PORT_1    : Port 1
 *                 - PINSEL_PORT_2    : Port 2
 *                 - PINSEL_PORT_3    : Port 3
 *
 * @param[in]    pinnum    Pin number,
 *                 should be one of the following:
                - PINSEL_PIN_0 : Pin 0
                - PINSEL_PIN_1 : Pin 1
                - PINSEL_PIN_2 : Pin 2
                - PINSEL_PIN_3 : Pin 3
                - PINSEL_PIN_4 : Pin 4
                - PINSEL_PIN_5 : Pin 5
                - PINSEL_PIN_6 : Pin 6
                - PINSEL_PIN_7 : Pin 7
                - PINSEL_PIN_8 : Pin 8
                - PINSEL_PIN_9 : Pin 9
                - PINSEL_PIN_10 : Pin 10
                - PINSEL_PIN_11 : Pin 11
                - PINSEL_PIN_12 : Pin 12
                - PINSEL_PIN_13 : Pin 13
                - PINSEL_PIN_14 : Pin 14
                - PINSEL_PIN_15 : Pin 15
                - PINSEL_PIN_16 : Pin 16
                - PINSEL_PIN_17 : Pin 17
                - PINSEL_PIN_18 : Pin 18
                - PINSEL_PIN_19 : Pin 19
                - PINSEL_PIN_20 : Pin 20
                - PINSEL_PIN_21 : Pin 21
                - PINSEL_PIN_22 : Pin 22
                - PINSEL_PIN_23 : Pin 23
                - PINSEL_PIN_24 : Pin 24
                - PINSEL_PIN_25 : Pin 25
                - PINSEL_PIN_26 : Pin 26
                - PINSEL_PIN_27 : Pin 27
                - PINSEL_PIN_28 : Pin 28
                - PINSEL_PIN_29 : Pin 29
                - PINSEL_PIN_30 : Pin 30
                - PINSEL_PIN_31 : Pin 31

 * @param[in]     funcnum Function number,
 *                 should be one of the following:
 *                - PINSEL_FUNC_0 : default function
 *                - PINSEL_FUNC_1 : first alternate function
 *                - PINSEL_FUNC_2 : second alternate function
 *                - PINSEL_FUNC_3 : third alternate function
 *
 * @return         None
 **********************************************************************/
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);
}

/*********************************************************************//**
 * @brief         Setup resistor mode for each pin
 * @param[in]    portnum PORT number,
 *                 should be one of the following:
 *                 - PINSEL_PORT_0    : Port 0
 *                 - PINSEL_PORT_1    : Port 1
 *                 - PINSEL_PORT_2    : Port 2
 *                 - PINSEL_PORT_3    : Port 3
 * @param[in]    pinnum    Pin number,
 *                 should be one of the following:
                - PINSEL_PIN_0 : Pin 0
                - PINSEL_PIN_1 : Pin 1
                - PINSEL_PIN_2 : Pin 2
                - PINSEL_PIN_3 : Pin 3
                - PINSEL_PIN_4 : Pin 4
                - PINSEL_PIN_5 : Pin 5
                - PINSEL_PIN_6 : Pin 6
                - PINSEL_PIN_7 : Pin 7
                - PINSEL_PIN_8 : Pin 8
                - PINSEL_PIN_9 : Pin 9
                - PINSEL_PIN_10 : Pin 10
                - PINSEL_PIN_11 : Pin 11
                - PINSEL_PIN_12 : Pin 12
                - PINSEL_PIN_13 : Pin 13
                - PINSEL_PIN_14 : Pin 14
                - PINSEL_PIN_15 : Pin 15
                - PINSEL_PIN_16 : Pin 16
                - PINSEL_PIN_17 : Pin 17
                - PINSEL_PIN_18 : Pin 18
                - PINSEL_PIN_19 : Pin 19
                - PINSEL_PIN_20 : Pin 20
                - PINSEL_PIN_21 : Pin 21
                - PINSEL_PIN_22 : Pin 22
                - PINSEL_PIN_23 : Pin 23
                - PINSEL_PIN_24 : Pin 24
                - PINSEL_PIN_25 : Pin 25
                - PINSEL_PIN_26 : Pin 26
                - PINSEL_PIN_27 : Pin 27
                - PINSEL_PIN_28 : Pin 28
                - PINSEL_PIN_29 : Pin 29
                - PINSEL_PIN_30 : Pin 30
                - PINSEL_PIN_31 : Pin 31

 * @param[in]     modenum: Mode number,
 *                 should be one of the following:
                - PINSEL_PINMODE_PULLUP    : Internal pull-up resistor
                - PINSEL_PINMODE_TRISTATE : Tri-state
                - PINSEL_PINMODE_PULLDOWN : Internal pull-down resistor

 * @return         None
 **********************************************************************/
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);
}

/*********************************************************************//**
 * @brief         Setup Open drain mode for each pin
 * @param[in]    portnum PORT number,
 *                 should be one of the following:
 *                 - PINSEL_PORT_0    : Port 0
 *                 - PINSEL_PORT_1    : Port 1
 *                 - PINSEL_PORT_2    : Port 2
 *                 - PINSEL_PORT_3    : Port 3
 *
 * @param[in]    pinnum    Pin number,
 *                 should be one of the following:
                - PINSEL_PIN_0 : Pin 0
                - PINSEL_PIN_1 : Pin 1
                - PINSEL_PIN_2 : Pin 2
                - PINSEL_PIN_3 : Pin 3
                - PINSEL_PIN_4 : Pin 4
                - PINSEL_PIN_5 : Pin 5
                - PINSEL_PIN_6 : Pin 6
                - PINSEL_PIN_7 : Pin 7
                - PINSEL_PIN_8 : Pin 8
                - PINSEL_PIN_9 : Pin 9
                - PINSEL_PIN_10 : Pin 10
                - PINSEL_PIN_11 : Pin 11
                - PINSEL_PIN_12 : Pin 12
                - PINSEL_PIN_13 : Pin 13
                - PINSEL_PIN_14 : Pin 14
                - PINSEL_PIN_15 : Pin 15
                - PINSEL_PIN_16 : Pin 16
                - PINSEL_PIN_17 : Pin 17
                - PINSEL_PIN_18 : Pin 18
                - PINSEL_PIN_19 : Pin 19
                - PINSEL_PIN_20 : Pin 20
                - PINSEL_PIN_21 : Pin 21
                - PINSEL_PIN_22 : Pin 22
                - PINSEL_PIN_23 : Pin 23
                - PINSEL_PIN_24 : Pin 24
                - PINSEL_PIN_25 : Pin 25
                - PINSEL_PIN_26 : Pin 26
                - PINSEL_PIN_27 : Pin 27
                - PINSEL_PIN_28 : Pin 28
                - PINSEL_PIN_29 : Pin 29
                - PINSEL_PIN_30 : Pin 30
                - PINSEL_PIN_31 : Pin 31

 * @param[in]    modenum  Open drain mode number,
 *                 should be one of the following:
 *                 - PINSEL_PINMODE_NORMAL : Pin is in the normal (not open drain) mode
 *                 - PINSEL_PINMODE_OPENDRAIN : Pin is in the open drain mode
 *
 * @return         None
 **********************************************************************/
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 ----------------------------------------------------------- */
/** @addtogroup PINSEL_Public_Functions
 * @{
 */
/*********************************************************************//**
 * @brief         Configure trace function
 * @param[in]     NewState State of the Trace function configuration,
 *                 should be one of the following:
 *                 - ENABLE : Enable Trace Function
 *                 - DISABLE : Disable Trace Function
 *
 * @return         None
 **********************************************************************/
void PINSEL_ConfigTraceFunc(FunctionalState NewState)
{
    if (NewState == ENABLE) {
        LPC_PINCON->PINSEL10 |= (0x01UL << 3);
    } else if (NewState == DISABLE) {
        LPC_PINCON->PINSEL10 &= ~(0x01UL << 3);
    }
}

/*********************************************************************//**
 * @brief         Setup I2C0 pins
 * @param[in]    i2cPinMode I2C pin mode,
 *                 should be one of the following:
 *                 - PINSEL_I2C_Normal_Mode : The standard drive mode
 *                 - PINSEL_I2C_Fast_Mode : Fast Mode Plus drive mode
 *
 * @param[in]    filterSlewRateEnable  should be:
 *                 - ENABLE: Enable filter and slew rate.
 *                 - DISABLE: Disable filter and slew rate.
 *
 * @return         None
 **********************************************************************/
void PINSEL_SetI2C0Pins(uint8_t i2cPinMode, FunctionalState filterSlewRateEnable)
{
    uint32_t regVal = 0;

    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;
}


/*********************************************************************//**
 * @brief         Configure Pin corresponding to specified parameters passed
 *                 in the PinCfg
 * @param[in]    PinCfg    Pointer to a PINSEL_CFG_Type structure
 *                    that contains the configuration information for the
 *                    specified pin.
 * @return         None
 **********************************************************************/
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 ------------------------------ */