RE: Enable APP Protection Fails

Ronny L — Wed, 18 Sep 2019 19:29:02 GMT

Thanks, this helped and works.

RE: Enable APP Protection Fails

superpak — Wed, 18 Sep 2019 18:20:37 GMT

Are you sure the NRF_UICR->APPROTECT register is being written to with your above code? I think you need to set the NVMC controller in write mode before you can write anything to the UICR registers.

Maybe try the following:

/* Turn on flash write enable and wait until the NVMC is ready: */
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos);
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}


/* write to the register */
NRF_UICR->APPROTECT = 0xFFFFFF00;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
    
/* Turn off flash write enable and wait until the NVMC is ready: */
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}