How to toggle GPIO Pin?

[Stational]

Hi,

i am wondering why my code doesn't work:

Code: Select all

#include <osapi.h>
#include <ets_sys.h>
#include <gpio.h>
#include "user_interface.h"
#include "eagle_soc.h"

os_timer_t timer;

void toggleGPIO(void){
    if (GPIO_REG_READ(GPIO_OUT_ADDRESS) & BIT10)
    {
        gpio_output_set(0, BIT10, BIT10, 0);
        os_printf("SET BIT10 to low.\n");
    }
    else
    {
        gpio_output_set(BIT10, 0, BIT10, 0);
        os_printf("SET BIT10 to high.\n");
    }
}

void user_init(void){
   os_timer_setfn(&timer,(os_timer_func_t*)toggleGPIO,NULL);
   os_timer_arm(&timer,1000,1);
}


I get alternating "SET BIT10 to high" and "SET BIT10 to low" on my serial console but in reality, GPIO10 is high all the time and never low. Why is that?

[pratik]

Please go through the documentation carefully. You have skipped a function to mark the GPIO as an output. For example,

Code: Select all

PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12); // Use MTDI pin as GPIO12.

GPIO names for your easy reference:
GPIO0: PERIPHS_IO_MUX_GPIO0_U
GPIO1: PERIPHS_IO_MUX_U0TXD_U
GPIO2: PERIPHS_IO_MUX_GPIO2_U
GPIO3: PERIPHS_IO_MUX_U0RXD_U
GPIO4: PERIPHS_IO_MUX_GPIO4_U
GPIO5: PERIPHS_IO_MUX_GPIO5_U
GPIO6: PERIPHS_IO_MUX_SD_CLK_U
GPIO7: PERIPHS_IO_MUX_SD_DATA0_U
GPIO8: PERIPHS_IO_MUX_SD_DATA1_U
GPIO9: PERIPHS_IO_MUX_SD_DATA2_U
GPIO10: PERIPHS_IO_MUX_SD_DATA3_U
GPIO11: PERIPHS_IO_MUX_SD_CMD_U
GPIO12: PERIPHS_IO_MUX_MTDI_U
GPIO13: PERIPHS_IO_MUX_MTCK_U
GPIO14: PERIPHS_IO_MUX_MTMS_U
GPIO15: PERIPHS_IO_MUX_MTDO_U