RE: How to Write values to UICR register ?

endnode — Wed, 27 Dec 2017 23:15:53 GMT

(also note that UICR registers are loaded at the start-up so to make it effective you need to reset the chip at least once, whatever method you use...)

RE: How to Write values to UICR register ?

Ole Saether — Wed, 27 Dec 2017 09:38:40 GMT

Yes, it's possible. Try this code:

NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos);
while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
NRF_UICR->APPROTECT = 0xFFFFFF00;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}

Or with nrfjprog:

nrfjprog --memwr 0x10001208 --val 0xffffff00