How to avoid 3rd party reading code from flash

[KHA]

Using J-link programmer, I try to figure out how to set some kind of security bit to avoid 3rd party reading code from flash.

If you could please return me a helpful link.

Thankyou

Kim Hansen

[Nguyen Hoan Hoang]

You can use nrfjprog to enable read back protection option.  It is part of the Nordic command line tools.  You can download it directly from nordicsemi.com 

[Hadi Deknache]

Hi Kim,

Think this post might be of interest:

https://devzone.nordicsemi.com/f/nordic-q-a/15900/nrf52-flash-protection

You should be able to write 0xFFFFFF00 to following register NRF_UICR->APPROTECT to protect the code in the flash.

Edit: 

You could also as Nguyen mentioned protect the application directly, by adding --rbp ALL when flashing with nrfjprog

/Hadi 

[KHA]

Thankyou :-)