Configuring LEDs for bootloader_secure-Example on custom-board

[Ray Breslin]

Hello,

I am using the bootloader_secure-Example on a custom-board and I want to configure a LED as status-indication.

Since I am on a custom-board I disabled the functions leds_init() and buttons_init(), that would provide some functionality when using a nRF52-DK. I also included the GPIOTE_ENABLED-section inside the sdk_config.h for the bootloader_secure-Example.

Afterwards I tried to simply trigger the LED with the following commands:

nrf_gpio_cfg_output(27);
nrf_gpio_pin_set(27);

Is there any reason why this might not work with the bootloader_secure-Example?

Besides some significant overhead it doesnt take much more in my application-programm to configure the LEDs on my custom-board, but it seems I might have overlooked something...

Any ideas?

[Daniel Wang]

Maybe the LED is active low? try nrf_gpio_pin_clear(27); instead

[Hung Bui]

You don't need to enable GPIOTE to toggle the LED. I don't see any problem with your code. Do you see the pin turned high ?

If you disable buttons_init() , how would you enter bootloader mode ? (Hold bootloader button when reset to enter bootloader mode)

[Ray Breslin]

That was it thank you! I thought I could skip it, but it seems that the transition 0->1 is only possible with giving a defined 0 before...

[Ray Breslin]

For an easy test it just needs the bootloader_secure-example being flashed and you are already in bootloader-mode! During normal operation I use some imported code-lines from the buttonless_dfu-example that work like a charm!