My code is hanging in sd_softdevice_enable()

RE: My code is hanging in sd_softdevice_enable()

Vidar Berg — Mon, 05 Nov 2018 07:40:36 GMT

Hi Ashok,

You are using the recommended settings for the RC oscillator so you should not encounter any problems related to the clock source and it's not required to use a LF crystal for BLE devices.

RE: My code is hanging in sd_softdevice_enable()

AshokY — Fri, 02 Nov 2018 18:11:53 GMT

Thanks for the support.

Currently I am going ahead without external RTC crystal.

Hence, I made changes in two places in my code.

1) #define NRF_SDH_CLOCK_LF_SRC 0 // <0=> NRF_CLOCK_LF_SRC_RC

2) #define NRF_SDH_CLOCK_LF_ACCURACY 1 // NRF_CLOCK_LF_ACCURACY_500_PPM

3) #define NRF_SDH_CLOCK_LF_RC_CTIV 16

4) #define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 2

With these changes..my code is not stopping at the place I mentioned above, also working for my application. Please correct me if any of my changes are wrong. Thanks for the support.

BTW, by not using the external RTC crystal, will there be any issues can any one anticipate in future?

Regards,

Ashok

RE: My code is hanging in sd_softdevice_enable()

Vidar Berg — Fri, 02 Nov 2018 11:58:01 GMT

Agree, this code is waiting for the external LFXO to start. See nrf_clock_lf_cfg_t for recommended LFRC configuration. Note that .accuracy must be set to 500 ppm when using the RC oscillator.

RE: My code is hanging in sd_softdevice_enable()

AmbystomaLabs — Thu, 01 Nov 2018 17:56:58 GMT

Normally this is caused by not including the external RTC crystal in the new design. All DKs have an external RTC crystal and the SD parameters in the examples are structured for it. If this is true that your new board was designed to use internal RC RTC then change the SD parameters to RTC_RC.