finding pin assignment for unknown beacon.

[Calin M]

Hi,

I bought an nrf51822 beacon from ebay, it has an LED and a button. I am trying to figure out what pins the LED and the button are connected to, without much success. For a start, I was hoping the code below would blink the led, but it doesn't. The beacon works fine, I can run other code on it, and the LED did work with the original firmware. Any other ideas?

for (int pin_number = 1; pin_number <= 31; pin_number++) {
	nrf_gpio_cfg_output(pin_number);    //config pin as output
}

while (true) {
	for (int pin_number = 1; pin_number <= 31; pin_number++) {
		nrf_gpio_pin_toggle(pin_number);
		nrf_delay_ms(500);
	}
}

Thanks!

[endnode]

You are right, there should be some termination after waiting 500ms in NOP loop. Like this all the pins should "light on" one by one and stay, shouldn't they?