SOFTDEVICE_HANDLER_INIT duration

[Olivier Scalbert]

Hello,

I am doing some tests with the Heart Rate Service Sample Application for the nRF51822 evaluation board (PCA 10001). Inside the ble_stack_init(), there is this call: SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, false); And this call takes 350ms. Is there a way to decrease this duration ? I am still using v5_1_0 sdk.

Thanks,

Olivier

[Håkon Alseth]

Hi Olivier,

The reason why this call takes so much time is because it will start up the 32 kHz source (external X32k takes up to 1 second).

If you use "NRF_CLOCK_LFCLKSRC_RC_250_PPM_8000MS_CALIBRATION" instead, it will shorten the start-up time, but will increase the average current consumption.

Best regards Håkon