clock_lf_cfg configuration in SDK15

[Mikhail]

Hi!

I have strange behavior.

nRF52, SD132 6.0, SDK15

I use RC clock src. 

nrf_clock_lf_cfg_t const clock_lf_cfg = 
{
.source = NRF_SDH_CLOCK_LF_SRC,
.rc_ctiv = NRF_SDH_CLOCK_LF_RC_CTIV,
.rc_temp_ctiv = NRF_SDH_CLOCK_LF_RC_TEMP_CTIV,
.accuracy = NRF_SDH_CLOCK_LF_ACCURACY
};

When NRF_SDH_CLOCK_LF_RC_CTIV = 16 and NRF_SDH_CLOCK_LF_RC_TEMP_CTIV = 2

project under debug doesn't start first time after start. After call 

ret_code = sd_softdevice_enable(&clock_lf_cfg, app_error_fault_handler); 

function, there is no any answear. If project in a Keil restart, project starts normal. Also if just supply power, project always starts normal many times. But under Keil, first start always fail. 

But if change to 

NRF_SDH_CLOCK_LF_RC_CTIV = 0 and NRF_SDH_CLOCK_LF_RC_TEMP_CTIV = 0

project always starts normal.

???

why?

[bjorn-spockeli]

Hi Mikhail,

 can you post the section of sdk_config.h that sets the NRF_SDH_CLOCK_XXX definitions?  The CTIV and TEMP_CTIV values are correct as far as I can tell. Are you saying that the nRF52 runs the code correctly when you're not debugging, but hangs when you run it in a debug session?

Is this a NRF52 DK or a custom board?

Best regards

Bjørn

[Mikhail]

Thanks for answer. Sorry for long delay.

This behavior on a custom board.

Now I use:

};

    nrf_clock_lf_cfg_t const clock_lf_cfg = 
    {
        .source       = NRF_SDH_CLOCK_LF_SRC,
        .rc_ctiv      = NRF_SDH_CLOCK_LF_RC_CTIV,
        .rc_temp_ctiv = NRF_SDH_CLOCK_LF_RC_TEMP_CTIV,
        .accuracy     = NRF_SDH_CLOCK_LF_ACCURACY
    };
    
    
    

// </h> 
//==========================================================

// <h> Clock - SoftDevice clock configuration

//==========================================================
// <o> NRF_SDH_CLOCK_LF_SRC  - SoftDevice clock source.
 
// <0=> NRF_CLOCK_LF_SRC_RC 
// <1=> NRF_CLOCK_LF_SRC_XTAL 
// <2=> NRF_CLOCK_LF_SRC_SYNTH 

#ifndef NRF_SDH_CLOCK_LF_SRC
#define NRF_SDH_CLOCK_LF_SRC 0
#endif

// <o> NRF_SDH_CLOCK_LF_RC_CTIV - SoftDevice calibration timer interval. 
#ifndef NRF_SDH_CLOCK_LF_RC_CTIV
#define NRF_SDH_CLOCK_LF_RC_CTIV 16
#endif

// <o> NRF_SDH_CLOCK_LF_RC_TEMP_CTIV - SoftDevice calibration timer interval under constant temperature. 
// <i> How often (in number of calibration intervals) the RC oscillator shall be calibrated
// <i>  if the temperature has not changed.

#ifndef NRF_SDH_CLOCK_LF_RC_TEMP_CTIV
#define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 2
#endif

// <o> NRF_SDH_CLOCK_LF_ACCURACY  - External clock accuracy used in the LL to compute timing.
 
// <0=> NRF_CLOCK_LF_ACCURACY_250_PPM 
// <1=> NRF_CLOCK_LF_ACCURACY_500_PPM 
// <2=> NRF_CLOCK_LF_ACCURACY_150_PPM 
// <3=> NRF_CLOCK_LF_ACCURACY_100_PPM 
// <4=> NRF_CLOCK_LF_ACCURACY_75_PPM 
// <5=> NRF_CLOCK_LF_ACCURACY_50_PPM 
// <6=> NRF_CLOCK_LF_ACCURACY_30_PPM 
// <7=> NRF_CLOCK_LF_ACCURACY_20_PPM 
// <8=> NRF_CLOCK_LF_ACCURACY_10_PPM 
// <9=> NRF_CLOCK_LF_ACCURACY_5_PPM 
// <10=> NRF_CLOCK_LF_ACCURACY_2_PPM 
// <11=> NRF_CLOCK_LF_ACCURACY_1_PPM 

#ifndef NRF_SDH_CLOCK_LF_ACCURACY
#define NRF_SDH_CLOCK_LF_ACCURACY 1
#endif

// </h> 

And seems it works. But it worked since I added back some queue file in the project.

Very strange.

[bjorn-spockeli]

Ok, so you're now able to run the code in a debug session without the code halting?

[Mikhail]

yes. now all works

[yuval]

Hi Mikhail,

I got the same problem.

I also setted to RC,16,2,500 PPM And it works OK regularly but halts in debug mode

What do you meen by "queue file" ?!

B,r 

Yuval