Enable to create a wakeup button on central multilink example

RE: Enable to create a wakeup button on central multilink example

Stefan Birnir Sverrisson — Mon, 31 Aug 2015 15:09:35 GMT

Hi Pedro

I think there should be no difference in code for the app_button if you use it for a Central or Peripheral application. Try to move the initialization of the libraries before you initialize the softdevice with ble_stack_init(), i.e. something like

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

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

By the way, the main.c file you have attached is apparently from another project, as it does not reflect the code you have previously posted for your main function.

RE: Enable to create a wakeup button on central multilink example

PedroSilva3 — Fri, 28 Aug 2015 10:27:38 GMT

main.c

The debugger stop on operation 0xFFFFFFFE , that means MOVS R0,R0 .

I know, but I already see many of this posts, but the problem is the implementation on central device. Usually the central device is a smartphone, and in my case, i want nrf51822 works as central. Thank in advance.

RE: Enable to create a wakeup button on central multilink example

Susheel Nuguru — Fri, 28 Aug 2015 10:11:00 GMT

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.

RE: Enable to create a wakeup button on central multilink example

PedroSilva3 — Fri, 28 Aug 2015 09:46:09 GMT

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 .

RE: Enable to create a wakeup button on central multilink example

Susheel Nuguru — Fri, 28 Aug 2015 09:36:44 GMT

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.

RE: Enable to create a wakeup button on central multilink example

PedroSilva3 — Fri, 28 Aug 2015 09:10:43 GMT

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();
			}
}

RE: Enable to create a wakeup button on central multilink example

Susheel Nuguru — Fri, 28 Aug 2015 06:56:04 GMT

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?