How protect the stored code from reading it back?

[Boris]

Hi, everyone,

We are developing the BLE project on NRF51822 and NRF52832 chips. In these chips we are storing the SDK BLE library, Bootloader and the main code. At this point is averything OK. But when we wanted to protect the chips from reading the code back we had the trouble: 

In the nRFgo Studio exist the options for read protection, but we couldn't enable them "Program SoftDevice" tab this option is always shadowed, In "Program Application" tab this option can be enabled but works only while burning he code itself from this probram while wee need to burn it by bootloader; and  in "Program Bootloader" tab this option doesn't exist at all.

In forums we saw many Ideas about readback protection  somewre was suggested to modify "NVMC->CONFIG" register, somewere was suggested to modify the "NRF_UICR->RBPCONF" register, but we couldn't find anything that describes exactly what we need.

How to protect the chip from reading it back and were can be written the required information?

Thank you forward for paying attention

Best Regards

Boris Fridman

[Nguyen Hoan Hoang]

nRFGo Studio is an old software that is no longer supported.  Use nrfjprog for that or alternately the IDAPnRFProg with IDAP-Link CMSIS-DAP JTAG

For details on how to enable the protection is in the datasheet.  nRF51 & nRF52 have different ways to protect.

[Kenneth]

I recommend to check out nrfjprog command line tool, then the command is the same for both nRF51 and nRF52. Make sure to power cycle the board for the configuration to take effect:

[[email protected]]

We want to do this too. Is there a way to configure this inherently in the application or bootloader code so when it is loaded into the chip, it automatically is locked from the code being read out of the chip?

[Kenneth]

Please make a new case.

Kenneth

[[email protected]]

devzone.nordicsemi.com/.../code-protection