RE: ble_app_template is not initiating

Snakehater — Wed, 15 Dec 2021 15:56:45 GMT

Thank you Vidar that worked very well!

RE: ble_app_template is not initiating

Vidar Berg — Wed, 15 Dec 2021 10:22:43 GMT

Hello,

It looks like your comes without the optional 32 KHz crystal mounted. In that case, you have to change the clock source from the crystal oscillator (default) to the internal RC oscillator for the Softdevice to work (stack requires a slow clock for timekeeping of connection intervals, etc). Otherwise the Softdevice will attempt to start the crystal and enter an endless loop waiting for the crystal to ramp up.

To change the clock source you can update the NRF_CLOCK_LFCLKSRC define in your board header to this:

NRF_CLOCK_LFCLKSRC  { .source        = NRF_CLOCK_LF_SRC_RC,            \
                      .rc_ctiv       = 16,                             \
                      .rc_temp_ctiv  = 2,                              \
                      .xtal_accuracy = NRF_CLOCK_LF_XTAL_ACCURACY_20_PPM //parameter is ignored when using RC }

For details about what each of the parameter above does, please refer to the nrf_clock_lf_cfg_t struct.

Best regards,

Vidar