How to reset NRF52 after readback protection?

[Richard D.]

Getting ready to go into production with our custom nRF52832 board, we need the board to start running our application immediately after being flashed.  Using:

nrfjprog version: 9.7.2
JLinkARM.dll version: 6.22d

Segger Base J-link programmer

Hex file contains sd132, bootloader, boot settings and application.

The nrfjprog --reset command works just fine, our application starts running and all is good.  But, the --reset command is not allowed after we've enabled read-back protection (--rbp command).

Neither the --pinreset command nor the --debugreset command cause our application to start running.

We do have the nReset pin connected to the programming interface with a 10k pullup, but I'm not seeing any activity on that line at all.

How can I get nrfjprog to reset my board after readback protection has been enabled?

TIA,

Richard

[Jeff4BLE]

Was pinreset enabled before read-back protection was set?

For nRF52 devices, only --pinreset or --recover operations are available after --rbp.

 See nrfjprog commands for additional details.

Cheers

[Richard D.]

Removing some variables by using PCA10040a instead of my custom board and leaving aside the issue of readback protection.

Test 1:
nrfjprog --chiperase --verify --program myfile.hex
nrfjprog --debugreset
result: my application is not running

Test 2:
nrfjprog --chiperase --verify --program myfile.hex
nrfjprog --pinreset
result: my application is not running

Test 3:
nrfjprog --chiperase --verify --program myfile.hex
nrfjprog --reset
result: my application is running

This suggests that --pinreset nor --debugreset are doing nothing or at least doing something different from --reset. Nrfjprog documentation says for all 3 commands that "The core will run after the operation". I'm not seeing this to be true. Is anyone out there using --pinreset or --debugreset successfully?

[Jeff4BLE]

Have you tried 

Test 1:
nrfjprog --chiperase --verify --program myfile.hex

nrfjprog --pinresetenable
nrfjprog --debugreset

Test 2:
nrfjprog --chiperase --verify --program myfile.hex

nrfjprog --pinresetenable
nrfjprog --pinreset

See nrfjprog commands for details.

[Richard D.]

That was it, I was missing the --pinresetenable.  Thank you very much!