Changing the oscillator

[komuro]

I would like to change the HFCLK from an internal to an external oscillator.
How can I do this in the software?

■Environment
  nRF52810
  s112

[Marjeris Romero]

Hi,

You can request the external crystal oscillator by using function sd_clock_hfclk_request(). You can check if the external crystal is running using sd_clock_hfclk_is_running().

Best regards,

Marjeris

[masterLee]

Hi, 

I think that the hfclk functions you mention can be used  if the soft device is already enabled

because if  I perform  sd_clock_hfclk_request() without  nrf_sdh_enable_request() first,

debugger throws:  ERROR 2 [NRF_ERROR_SOFTDEVICE_NOT_ENABLED]

   //APP_ERROR_CHECK(nrf_sdh_enable_request());
   APP_ERROR_CHECK(sd_clock_hfclk_request());
   APP_ERROR_CHECK(sd_clock_hfclk_is_running(&p_k));
   NRF_LOG_INFO(" *p_k = %d", *p_k);
   if(*p_k == 1) 
   { NRF_LOG_INFO("Crystal Running"); }
   else 
   { NRF_LOG_INFO("Crystal not Running. Return Value %d", *p_k);}

Is this correct?