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LPC1114 GPIO P1.0~P1.3 doesn't work

ALEXANDRE PERUSSI

I'm not able to make it work the GPIO P1.0-P1.3 of LPC1114. Both in hardware as in keil debug the GPIO's P1.0 dont clear.

int main()
{
        /* Enable AHB clock to the GPIO domain. */
        LPC_SYSCON->SYSAHBCLKCTRL |= (0x1UL << 16);  /* enable clock for IOCON      */
        LPC_SYSCON->SYSAHBCLKCTRL |= (0x1UL << 6);  /* enable clock for GPIO      */

        LPC_IOCON->R_PIO1_0 |= 0x01; /* P1.0 as GPIO      */
        LPC_GPIO1->DIR  |= (1UL <<  0);                /* P1.0 as GPIO      */
        LPC_GPIO1->DATA &= ~(1UL <<  0);   /* Clear P1.0      */ //*********Don't work

        while(1);
}

what's wrong with this code?

Parents
  • 0 in reply to John Linq

    Your code worked fine in Keil IDE simulator, but in the hardware needed config IOCON after config DIR. If config IOCON before the DIR, don't work in the hardware. Thanks

    
#include "LPC11XX.h"

int main()
{
    LPC_SYSCON->SYSAHBCLKCTRL |= (0x1UL << 16);  /* enable clock for IOCON */
    LPC_SYSCON->SYSAHBCLKCTRL |= (0x1UL << 6);   /* enable clock for GPIO  */

    LPC_GPIO1->DIR = 0x1;

    LPC_IOCON->R_PIO1_0 |= (0x1UL << 0);

    LPC_GPIO1->DATA &= ~0x1;
    LPC_GPIO1->DATA |=  0x1;

    while(1)
    {
        LPC_GPIO1->DATA &= ~0x1;
        LPC_GPIO1->DATA |=  0x1;
    }
}

Reply
  • 0 in reply to John Linq

    Your code worked fine in Keil IDE simulator, but in the hardware needed config IOCON after config DIR. If config IOCON before the DIR, don't work in the hardware. Thanks

    
#include "LPC11XX.h"

int main()
{
    LPC_SYSCON->SYSAHBCLKCTRL |= (0x1UL << 16);  /* enable clock for IOCON */
    LPC_SYSCON->SYSAHBCLKCTRL |= (0x1UL << 6);   /* enable clock for GPIO  */

    LPC_GPIO1->DIR = 0x1;

    LPC_IOCON->R_PIO1_0 |= (0x1UL << 0);

    LPC_GPIO1->DATA &= ~0x1;
    LPC_GPIO1->DATA |=  0x1;

    while(1)
    {
        LPC_GPIO1->DATA &= ~0x1;
        LPC_GPIO1->DATA |=  0x1;
    }
}

Children
  • 0 in reply to ALEXANDRE PERUSSI

    Hi, 

    I would like to use GPIO 1_20 in my lpc11uxx platform. How to define the gpio registers, direction, output high and low.. Again the same gpio will change it in input.. Like 1 wire logic can someone help me how this can be defined to operate and read the gpio. 

    Regards