button handler interrupt - nrf52840 dongle

Question

Hello,

I guess it is a simple problem, but I am new to the nrf world, so here is my issue:

#include <stdint.h>
#include <string.h>
#include "nordic_common.h"
#include "boards.h"
#include "pca10059.h"
#include "app_timer.h"
#include "app_button.h"
#include "app_scheduler.h"

static void button_handler(uint8_t pin, uint8_t action)
{
    if (pin == BSP_BUTTON_0){
        if (action == APP_BUTTON_PUSH){
            bsp_board_led_on(BSP_BOARD_LED_0);
        } else if (action == APP_BUTTON_RELEASE){
            bsp_board_led_off(BSP_BOARD_LED_0);
        }
    }
}

/**@brief Function for application main entry.
 */
int main()
{
    bsp_board_init(BSP_INIT_LEDS);
    app_timer_init();
    //The array must be static because a pointer to it will be saved in the button handler module.
    static app_button_cfg_t buttons[] =
    {
        {BSP_BUTTON_0, false, BUTTON_PULL, button_handler}
    };
    app_button_init(buttons, ARRAY_SIZE(buttons), APP_TIMER_TICKS(50));
    app_button_enable();
}
/**
 * @}
 */

I want to use this code to switch on a LED by pressing the on board button (BSP_BUTTON_0) on my nrf dongle. But when I run it and press the button, no interrupt is fired and nothing happens. But if I add a softdevice and add

nrf_sdh_enable_request();

to my main, it works perfectly. So, is there a way to get this code running without any softdevice? And why is it just working with it?

Thanks

Maboo

Ps: I am using SDK17 on Linux, VS Code

Maboo · Accepted Answer

Ok, it took me a while. I solved the problem with GPIOTE 
 I added to the Makefile: 
 
 $(SDK_ROOT)/modules/nrfx/drivers/src/nrfx_gpiote.c \

The relevant parts of my code: 
 #include "nrf_drv_gpiote.h"
#include "nrf_delay.h"

...

static void gpio_init(void)
{
 nrf_drv_gpiote_init(); 
 nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(true);
 nrf_drv_gpiote_out_init(BSP_LED_1, &out_config);
 nrf_drv_gpiote_out_init(BSP_LED_2, &out_config); 
 nrf_drv_gpiote_out_init(BSP_LED_3, &out_config);
 nrf_drv_gpiote_out_init(BSP_LED_4, &out_config); 
}

...

int main(void)
{
 while(true)
 {
 nrf_drv_gpiote_out_toggle(BSP_LED_1);
 nrf_delay_ms(500);
 nrf_drv_gpiote_out_toggle(BSP_LED_2);
 nrf_delay_ms(500);
 nrf_drv_gpiote_out_toggle(BSP_LED_3);
 nrf_delay_ms(500);
 nrf_drv_gpiote_out_toggle(BSP_LED_4);
 nrf_delay_ms(500);
 }
 

}

Have a nice day! 
 
 Maboo

button handler interrupt - nrf52840 dongle

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