nrf_drv_gpiote_in_event_enable

[Sunil519]

Hello,

I'm using multiple GPIO pins as inputs. Should I use  nrf_drv_gpiote_in_event_enable() for each pin? Also how to configure the input_event_handler() to handle the events from different inputs?

Regards,

Sunil

[MartinBL]

Hi

Here is a modified version of the Pin Change Interrupt Example in SDK 15. It shows how to use two input pins to control two output pins. 

/** @file
 * @defgroup pin_change_int_example_main main.c
 * @{
 * @ingroup pin_change_int_example
 * @brief Pin Change Interrupt Example Application main file.
 *
 * This file contains the source code for a sample application using interrupts triggered by GPIO pins.
 *
 */

#include <stdbool.h>
#include "nrf.h"
#include "nrf_drv_gpiote.h"
#include "app_error.h"
#include "boards.h"

#define PIN_IN1	    BSP_BUTTON_0
#define PIN_IN2	    BSP_BUTTON_1


#define PIN_OUT1	    BSP_LED_0
#define PIN_OUT2    BSP_LED_1

void in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
    if(pin == PIN_IN1)
	nrf_drv_gpiote_out_toggle(PIN_OUT1);
    else if(pin == PIN_IN2)
	nrf_drv_gpiote_out_toggle(PIN_OUT2);
}
/**
 * @brief Function for configuring: PIN_IN1 pin for input, PIN_OUT1 pin for output,
 * and configures GPIOTE to give an interrupt on pin change.
 */
static void gpio_init(void)
{
    ret_code_t err_code;

    err_code = nrf_drv_gpiote_init();
    APP_ERROR_CHECK(err_code);

    nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(false);

    err_code = nrf_drv_gpiote_out_init(PIN_OUT1, &out_config);
    APP_ERROR_CHECK(err_code);


    err_code = nrf_drv_gpiote_out_init(PIN_OUT2, &out_config);
    APP_ERROR_CHECK(err_code);
    
    

    nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(true);
    in_config.pull = NRF_GPIO_PIN_PULLUP;

    err_code = nrf_drv_gpiote_in_init(PIN_IN1, &in_config, in_pin_handler);
    APP_ERROR_CHECK(err_code);
    
    
    err_code = nrf_drv_gpiote_in_init(PIN_IN2, &in_config, in_pin_handler);
    APP_ERROR_CHECK(err_code);

    nrf_drv_gpiote_in_event_enable(PIN_IN1, true);
    nrf_drv_gpiote_in_event_enable(PIN_IN2, true);
}

/**
 * @brief Function for application main entry.
 */
int main(void)
{
    gpio_init();

    while (true)
    {
        // Do nothing.
    }
}


/** @} */

[Sunil519]

Hi Martin,

Thanks for answering my question.

Regards,

Sunil