can't Write RBPCONF

[larry]

i want to prevent somebody to copy my app by SWD interface,so i set RBPCONF register in main application,but i find that it is no use writing RBPCONF register. First ,i write 0xFFFF0000 to RBPCONF register(NRF_UICR->RBPCONF =0xFFFF0000;),Then i read RBPCONF register,i find that RBPCONF register's value is 0xFFFFFFFF. how should i set RBPCONF registe .

[Asbjørn]

The UICR register is placed in flash so you can't access is directly like you are trying to do. Instead you must do a flash write operations. If you're not using a softdevice you can set this register by writing:

nrf_nvmc_write_word(0x10001004, 0xFFFF0000);

If you are using a softdevice you can write to the same register by using the softdevice wrapper function:

sd_flash_write()