GPIO Digital Output Not Working

Question

Why isn't this working? 
 static void gpio_init(void)
{
 ret_code_t err_code;

 //NB as #include "bsp_btn_ble.h" is already initiated within main.c we do not need to initiate GPIO here
 if (!nrfx_gpiote_is_init) {
 err_code = nrfx_gpiote_init();
 APP_ERROR_CHECK(err_code);
 }

 nrfx_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(true); //GPIOTE_CONFIG_OUT_TASK_TOGGLE(false);
 out_config.init_state = NRF_GPIOTE_INITIAL_VALUE_HIGH;
 out_config.task_pin = true;
 err_code = nrfx_gpiote_out_init(MPU_RESET_PIN, &out_config);
 APP_ERROR_CHECK(err_code);
 nrfx_gpiote_out_task_enable(MPU_RESET_PIN);

} 
 The MPU_RESET_PIN is set to : NRF_GPIO_PIN_MAP( 0 , 20 ) 
 I can not seem to be able to alter the state of the PIN. Whenever I read the PIN its always HIGH. 
 I have successfully managed to work with in inout on NRF_GPIO_PIN_MAP( 0 , 19 ) and I know pin 20 is available and not mapped elsewhere.

Edvin · Accepted Answer

Do you have a project file? Actually, the best would be if you zipped the project folder, such as e.g. SDK\examples\peripheral\pin_change_int 
 if you zip pin_change_int, that would contain your main.c file, sdk_config.h (which you have there) and the project file. I don't know what you use to compile, but I am missing that file here. 
 
 Have you tried to actually measure your pin? I see that you use nrf_gpio_pin_read(), which is an input register. Perhaps you can try nrf_gpio_pin_out_read()? 
 
 Do you use your MPU_RESET_PIN for something else?

GPIO Digital Output Not Working

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