change UICR register values

[chandan]

Hi, I am trying to modify  UICR PSELRESET but its not changing. Any help?

NRF_UICR->PSELRESET[0] = 0xFFFFFFFF ;
NRF_UICR->PSELRESET[1] = 0xFFFFFFFF ; 

Thanks

[William E.]

Read this:

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fuicr.html

You need to erase the UICR region in order to write bits from 0 to 1, 1 to 0 does not require an erase operation. Also:

"After UICR has been written, the new UICR configuration will only take effect after a reset."

[chandan]

Currently in NRF_UICR->PSELRESET value is 21 which means pin 21 is reset so I want to remove this pin from reset, That's y i m updating value to 0xFFFFFFFF. Can you suggest?

[chandan]

Updated my code as below, working fine.

NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Een << NVMC_CONFIG_WEN_Pos;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){};

NRF_NVMC->ERASEUICR = NVMC_ERASEUICR_ERASEUICR_Erase;

NRF_UICR->PSELRESET[0] = 0xFFFFFFFF ;
NRF_UICR->PSELRESET[1] = 0xFFFFFFFF ;

NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}