How to handle GPIO5 pins?

cerilet.com posted on 30 Oct 2009 8:38 AM

rated by 0 users

I have problems trying to set GPIO5[10] and GPIO5[11].

I add those rows at the end of the gpio_evminit.c file to select the right pin multiplexing:

sysRegs->PINMUX8 |= ( (CSL_SYSCFG_PINMUX8_PINMUX8_23_20_GPIO5_10) << \
                        (CSL_SYSCFG_PINMUX8_PINMUX8_23_20_SHIFT)  );

sysRegs->PINMUX8 |= ( (CSL_SYSCFG_PINMUX8_PINMUX8_27_24_GPIO5_11) << \
                        (CSL_SYSCFG_PINMUX8_PINMUX8_27_24_SHIFT)  );

I had rebuild the evmInit.pjt then I compile my project, but it does not work. What is wrong?

Gpio_Handle gpio0;

void main(void)
{
   
    Gpio_Params gpioParams = Gpio_PARAMS;
    Gpio_PinCmdArg UserPinCmdArg;

    gpioParams.instNum = 0;
    gpioParams.BankParams[5].inUse = Gpio_InUse_No;
   
    gpioParams.BankParams[5].PinConfInfo[10].inUse = Gpio_InUse_No;
    gpioParams.BankParams[5].PinConfInfo[11].inUse = Gpio_InUse_No;

    /* open the GPIO driver to get a handle to it */
    gpio0 = Gpio_open(&gpioParams);

    /* Call the EVM specific initialization function                          */
    configureGpio();

    /* Configure GPIO5_10 and GPIO5_11 as an output */
    UserPinCmdArg.pin = 11;
    UserPinCmdArg.value = Gpio_Direction_Output;
    Gpio_setPinDir(gpio0,&UserPinCmdArg);
    UserPinCmdArg.pin = 12;
    UserPinCmdArg.value = Gpio_Direction_Output;
    Gpio_setPinDir(gpio0,&UserPinCmdArg);

    // Setting GPIO5[10] to LOW
    UserPinCmdArg.pin = 11;
    UserPinCmdArg.value = LOW;
    Gpio_setPinVal(gpio0,&UserPinCmdArg);

    // Setting GPIO5[11] to HIGH
    UserPinCmdArg.pin = 12;
    UserPinCmdArg.value = HIGH;
    Gpio_setPinVal(gpio0,&UserPinCmdArg);

    Gpio_close(gpio0);

    return;
}

I was looking for more information and I only found in the cslr_gpio.h was:

// Bank registers and Pin tokens

#define GP5  2

#define GP5P10 (1 << 26)
#define GP5P11 (1 << 27)

I thing somewhere I have to select the bank register 2 and bits 26th and 27th but I don't know neither how nor where.

Where can I find more information about how works pin multiplexing and everything I need?

Thanks!