TASKS_CONSTLAT is not working on NRF54L15

[gandyhuang]

HI,

I am using "NRF_POWER->TASKS_CONSTLAT = 1;" to enable CONSTLAT, but when i  printf("TASKS_CONSTLAT %d",NRF_POWER->CONSTLATSTAT); the result is still 0; how can i  config it? thanks

  

[Simonr]

Hi

We've tried reproducing this with the ESB_PTX sample, but the CONFIG_SOC_NRF_FORCE_CONSTLAT Kconfig option lets constant latency mode work just fine. Setting it directly in main.c also works on our end.

Can you share some details on your setup as well as upload your .conf file so we can take another look or provide some steps for us to reproduce this on our end.

Best regards,

Simon

[gandyhuang]

HI Simon,

I tested it again，you can find the code in attached file, set 

CONFIG_SOC_NRF_FORCE_CONSTLAT=y in pro.conf file, and "

LOG_INF("CONSTLAT=%d",NRF_POWER->CONSTLATSTAT); 

" in main.c; the log is below(DK: PCA10156 V0.8.1)

*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
I: Enhanced ShockBurst ptx sample
D: HF clock started
I: Initialization complete
I: Sending test packet
I: CONSTLAT=0 (I think It's should 1 when enable)
D: TX FAILED EVENT

esb_ptx_2.zip