ASSERTION FAILED PC=0X154A2

chip:nrf52840

SD:S140 6.1.0

SDK:nRF5 SDK v15.2.0

ASSERTION FAILED often appears in my firmware, connecting J-link in debugging state or turning on NRF_LOG and outputting a large number of logs in RTT mode may increase the probability of occurrence. The firmware also uses FREERTOS, please help me

  • Thank you, the change of low frequency clock source to  synthesized clock mentioned in this post worked for me. Although I used the internal low frequency clock before.

  • AAC said:
    Although I used the internal low frequency clock before.

     Ok, Was this the configuration you used?

    //==========================================================
    
    // <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

  • Ok, good. Could be that your debugging is somehow interfering with the LF clock, especially if you place breakpoints, halt the CPU, etc. For lower power consumption, you should switch back to LF RC when you are not debugging.

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