RE: nRF52832 Breakout Board

bjorn-spockeli — Mon, 27 Jan 2020 15:06:36 GMT

Yes, if the application is using a SoftDevice, then that must be flashed first.

RE: nRF52832 Breakout Board

Marshed — Mon, 27 Jan 2020 15:01:36 GMT

the clock was connected so that wasn't the problem.

I figured if you want to program these devices which come with their own software you should first erase all before loading your new program. I did that and it worked fine.

RE: nRF52832 Breakout Board

bjorn-spockeli — Mon, 27 Jan 2020 08:52:07 GMT

Hi Marshed,

does the nRF52832 breakout board have a external 32kHz crystal? The SDK examples are configured to use an external 32kHz crystal as the low frequency clock source. If this external crystal is not present, then you need to change the configuration so that the internal RC oscillator is used instead. This is done by setting the following configuration in the sdk_config.h file of the example

// </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

Best regards

Bjørn