Enable to create a wakeup button on central multilink example

[PedroSilva3]

I'm trying to implement a wake-up button on central multilink example. I.e, i need to implement the app_button in order to wake up from sd_evt_wat() function. The problem is when I add this characteristic on buttons_init,

uint32_t err_code;

// @note: Array must be static because a pointer to it will be saved in the Button handler
//        module.
static app_button_cfg_t buttons[] =
{
    {SEND_NOTIFICATION_BUTTON_PIN, false, NRF_GPIO_PIN_PULLUP, button_event_handler},
    {BOND_DELETE_ALL_BUTTON_PIN  , false, NRF_GPIO_PIN_PULLUP, NULL},
};

APP_BUTTON_INIT(buttons, sizeof(buttons) / sizeof(buttons[0]), BUTTON_DETECTION_DELAY, false);

err_code = app_button_enable();
APP_ERROR_CHECK(err_code);

the project simple crash until reach the main function. Can anyone hellp me? I'm using S120 1.0.1 and SDK_v6.1.0_b2ece6.

Thansk in advance and i'm sorry about my english.

[Susheel Nuguru]

can you show us your main() function? when you say application crash is it a hardfault or maybe APP_ERROR_CHECK failed causing a system reset?

[PedroSilva3]

I think it is a hardfault because in debug mode, i put a breakpoint on the first call on main, in this case on "ble_stack_init(), and never stop there. There is some way to see what error happen? i'm using keil v5 . If i comment APP_BUTTON_INIT the program works perfectly. If I uncomment, the program compiles without errors and when I run anything happen :/

This is my simple main function:

int main(void)
{
			ble_stack_init();
			leds_init();
			gpiote_init();
			buttons_init();
			client_handling_init();
			device_manager_init();

			// Star scanning
			scan_start();
				
			for (;;)
			{
					power_manage();
			}
}

[Susheel Nuguru]

you also need to initialize app_timer before buttons_init for the buttons to work. Look for button example in SDK. Timer is used for checking button debouncing.

[PedroSilva3]

Yes, I already have this. But, if i put timers_init(), it happens the same.

static void timers_init(void){ // Initialize timer module, making it use the scheduler. APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, false); }

Basically, I copy the functions from multilink_peripheral. I.e, i add gpio_init, timers_init and button_event_handler. And I add the files to libraries. I can post my code here, if you prefer. I'm really stuck .

[Susheel Nuguru]

please add APP_TIMER_INIT in your code and if it gets stuck, start the debugger, run and stop the debugger. The debugger will tell you where the code is stuck. buttons library is used by many many customers and there are tons of information about that in this forum. Your problem seems to be you not able to debug your code. you can post your main.c file here and i can have a quick look into it.