Softdevice doesn't turn on HFCLK

RE: Softdevice doesn't turn on HFCLK

shai.c — Sun, 26 Apr 2020 08:19:31 GMT

Thanks!

RE: Softdevice doesn't turn on HFCLK

Sigurd — Thu, 23 Apr 2020 15:11:41 GMT

[quote user="shai.c"]With the previous setting in sdk_config.h it tried to use external clock?[/quote]

That is correct. You can read more about SoftDevice clock source at this link.

RE: Softdevice doesn't turn on HFCLK

shai.c — Thu, 23 Apr 2020 14:47:36 GMT

Thanks for your answer,

Can you explain about the LFRC changes?

With the previous setting in sdk_config.h it tried to use external clock?

RE: Softdevice doesn't turn on HFCLK

Sigurd — Thu, 23 Apr 2020 14:22:58 GMT

[quote user="shai.c"]it works with the internal LFRC oscillator and the device is advertising.[/quote]

Good!

[quote user="shai.c"]what can be the problem with the hfclk?[/quote]

Is there a problem with the HFCLK ? If the device is advertising, and you are able to connect to the device, then everything should be working.

RE: Softdevice doesn't turn on HFCLK

shai.c — Thu, 23 Apr 2020 13:51:07 GMT

it works with the internal LFRC oscillator and the device is advertising.

what can be the problem with the hfclk?

RE: Softdevice doesn't turn on HFCLK

Sigurd — Thu, 23 Apr 2020 13:42:01 GMT

Try using the internal LFRC oscillator instead. In sdk_config.h set NRF_SDH_CLOCK_LF_SRC to 0, NRF_SDH_CLOCK_LF_RC_CTIV to 16, NRF_SDH_CLOCK_LF_RC_TEMP_CTIV to 2, and NRF_SDH_CLOCK_LF_ACCURACY to 1

RE: Softdevice doesn't turn on HFCLK

shai.c — Thu, 23 Apr 2020 13:33:23 GMT

RE: Softdevice doesn't turn on HFCLK

Sigurd — Thu, 23 Apr 2020 13:31:10 GMT

[quote user="shai.c"]No, the device isn't advertising[/quote]

Do you have a LF Crystal on your custom board?

RE: Softdevice doesn't turn on HFCLK

shai.c — Thu, 23 Apr 2020 13:25:42 GMT

No, the device isn't advertising

RE: Softdevice doesn't turn on HFCLK

Sigurd — Thu, 23 Apr 2020 13:23:02 GMT

Hi,

The SoftDevice will only request the HFCLK when it needs to. I.e. when it uses the RADIO. Only requesting the HFCLK when needed lowers the power consumption.

If you want the SoftDevice to keep the HFCLK running, use the function sd_clock_hfclk_request()

[quote user=""]ble_app_uart example[/quote]

Do you see the device advertising, if you use nRF Connect for mobile to scan for the device ?