nrf51822 gpiote could not enter interrupt routine

[mm81]

Hello I am using SDK12.3 without softdevice on a custom board (with nrf51822 256k flash, 16kram without 32768 crystal).

I have written some code using GPIOTE to detect two buttons (with app_button library) when pressed and it worked no problem on nrf5 dev board.

However when i ported the code to the custom board i found that button press could only wake up the MCU but it won't enter the interrupt routine (button handler function).

Any idea could lead to this problem??

Thanks. MM

[Amigo]

NVIC_EnableIRQ(GPIOTE_Irqn) ?

[mm81]

Thanks Amigo, tried to add this but it makes no difference (also the original code works in NFF51 DK board do not need it)

Below are the code i initialize the buttons...

static void buttons_leds_init(bool * p_erase_bonds)
{    
	uint32_t err_code;
	static app_button_cfg_t p_button[] = {{BUTTON_1, APP_BUTTON_ACTIVE_HIGH, NRF_GPIO_PIN_NOPULL, button_handler},		
											  {BUTTON_2, APP_BUTTON_ACTIVE_LOW, NRF_GPIO_PIN_PULLUP, button_handler}};	
				
	APP_GPIOTE_INIT(APP_GPIOTE_MAX_USERS);																					
	// Initializing the buttons.
	err_code = app_button_init(p_button, sizeof(p_button) / sizeof(p_button[0]), BUTTON_DEBOUNCE_DELAY);
	
	APP_ERROR_CHECK(err_code);																					
	err_code = app_button_enable();	
	APP_ERROR_CHECK(err_code); 
}