How to know if nrf51 is protected from readback or not?

[Hust]

Hello DevZone community, Currently I am using nrf51822. Could you guys please tell me how to enable code protection besides check the "Lock entire chip from readback" in nRFGo studio? I have tried to add uicr_config.h in to my application code file and typed this line into it: const uint32_t UICR_RBPCONF attribute((at(0x10001004))) attribute((used)) = 0x00000000; but I don't know if this work or not. Is there any method to check if a chip is protected or not? I am sorry for my English. Thank you for your kind supports.

[Hung Bui]

Hi Hust,

You can always use nrfjprog (or Jlink Commander) to read and write a register in UICR. For example: nrfjprog --memrd 0x10001004

You can use memwr to write.

After you write to RBPCONF you can test reading the flash using nrfjprog to check if it's blocked or not.

[Hust]

Thank for your kind answer. It helps a lot.