finding pin assignment for unknown beacon.

Question

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 · Accepted Answer

What about simply calling or mailing them? If you say you want to purchase in bulk but you want to develop your own FW and need to know basic PIN assignment they will tell you... 
 
 radioland-china.en.alibaba.com/ 
 www.radioland-china.com/.../

Calin M · Answer

The beacon in question is using a QFAA Chip. All my other boards are using a QFAC chip. I had to change the linker params in nrf5x_common.ld like this: 
 MEMORY
{
 FLASH (rx) : ORIGIN = 0x1b000, LENGTH = 0x25000
 RAM (rwx) : ORIGIN = 0x20002080, LENGTH = 0x1f80
}
 
 now it works !

finding pin assignment for unknown beacon.

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