Hello,
I have this scenario : I want each of my board to have a set of unique data, that I want to write along with the program, at the board initialization (this data will be uses the first time the board boots).
I have understood that I could use customer registers (in UICR) for that.
If I program my board (with "nrfjprog --program ..."), then try to write to customer registers, nrfjprog tells me they are protected, which I get.
So I tried the contrary :
- erasing all
- writing to customer register
- program the board
- read from customer register from app
Unfortunately, I succeed writing to customer register, but they are overwritten after programming.
NRF52811
SD s112 7.0.1
SDK 16.0.0
$ nrfjprog --eraseall
Erasing user available code and UICR flash areas.
Applying system reset.
$ nrfjprog --memwr 0x80 --val 0x195B6635
Parsing parameters.
Writing.
$ nrfjprog --memrd 0x080 --n 8
0x00000080: 195B6635 FFFFFFFF |5f[.....|
$ nrfjprog --program .my_app_bl_sd_app.hex --verify --chiperase (containing app+settings+bootloader+softdevice)
Parsing hex file.
Erasing user available code and UICR flash areas.
Applying system reset.
Checking that the area to write is not protected.
Programming device.
Verifying programming.
Verified OK.
$ nrfjprog --memrd 0x080 --n 8
0x00000080: 000007FB 00000805 |........|
What am I missing ?
Thanks !
