nRF51422 xxAA S110 strange hanging

[GrzesiekG]

Hello,

I'm developing a custom UART through BLE using NUS. I've been testing my idea on the nRF51822 USB Dongle and it worket perfectlly (compiling on latest Keil V5), utilizing a nRF51422 xxAC design template.

The problem begins when I want to run my project on a nRF51422 xxAA, on my custom PCB. The device is programmed succesfully through a J-Link Lite programmer (and nRF Studio), both the S110 and the target app. When I'm debugging the project in Keil, it hang while entering the sd_softdevice_enable() call.

I'm totally confused what is wrong. Am I missing something? Or maybe should I add some "C/C++" defines or something... Does the XTAL configuration has to do here something?

Please help :(

[Nguyen Hoan Hoang]

Yes it does. By default all examples use the 32KHz crystal. if you don't have that installed, you need to use RC OSC to initialized Softdevice.

[GrzesiekG]

Just to be clear, in my ble_init() I've done something like this:

//SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, NULL);
SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_RC_250_PPM_250MS_CALIBRATION, NULL);

It worked, thankyou :)

[Nguyen Hoan Hoang]

Yes, that is what needed to be set. You also try a longer calib period to lower power consomption.