unable to flash on bt 40

RE: unable to flash on bt 40

Kazi Afroza Sultana — Tue, 25 Mar 2025 13:21:49 GMT

Hello,

It looks like Netwok core is having issue while recovering. can you try the follwoing way?

nrfjprog --recover --coprocessor CP_NETWORK
nrfjprog --recover

RE: unable to flash on bt 40

lalith88 — Fri, 21 Mar 2025 05:37:21 GMT

[error] [ Client] - Encountered error -102: Command select_coprocessor executed for 296 milliseconds with result -102
ERROR: Failed when selecting coprocessor APPLICATION
[error] [ Worker] - An unknown error.
ERROR: JLinkARM DLL reported an error. Try again. If error condition
ERROR: persists, run the same command again with argument --log, contact Nordic
ERROR: Semiconductor and provide the generated log.log file to them.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.
FATAL ERROR: command exited with status 33: nrfjprog --program 'c:\Users\lnaik\Desktop\New_develop\build_1\zephyr\merged.hex' --sectorerase --verify -f NRF53 --coprocessor CP_APPLICATION --snr 600105674
can you check this once please

RE: unable to flash on bt 40

lalith88 — Wed, 19 Mar 2025 06:23:03 GMT

C:\Users\lnaik\Desktop\New_develop>nrfjprog --recover --coprocessor CP_NETWORK
Recovering device. This operation might take 30s.
[error] [ Client] - Encountered error -21: Command recover executed for 14 milliseconds with result -21
[error] [ Worker] - Eraseprotect is enabled and readback protection setting is ALL, can't recover device.
ERROR: Recover failed. Please make sure that the correct device family is given
ERROR: and try again.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.
i think this is the major issue

RE: unable to flash on bt 40

lalith88 — Wed, 19 Mar 2025 06:13:30 GMT

C:\Users\lnaik\Desktop\New_develop>nrfjprog --recover --coprocessor CP_APPLICATION
Recovering device. This operation might take 30s.
Erasing user code and UICR flash areas.
Writing image to disable ap protect.

[error] [ Client] - Encountered error -102: Command enable_coprocessor executed for 170 milliseconds with result -102
Failed to enable coprocessor with unknown error.
[error] [ Worker] - An unknown error.
ERROR: JLinkARM DLL reported an error. Try again. If error condition
ERROR: persists, run the same command again with argument --log, contact Nordic
ERROR: Semiconductor and provide the generated log.log file to them.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.
FATAL ERROR: command exited with status 33: nrfjprog --recover -f NRF53 --coprocessor CP_NETWORK --snr 1050060012
now i am getting this error

RE: unable to flash on bt 40

Kazi Afroza Sultana — Tue, 18 Mar 2025 14:44:55 GMT

Hello,

The error seems related to memory protection issue which is common error. This is likely due to APPPROTECT, SECUREAPPROTECT or ERASEPROTECT being enabled on nRF5340.

You can try to use west flash --recover or can use nrfjprog command to recover both application and network core.

First, you have to recover the application core

nrfjprog --recover --coprocessor CP_APPLICATION

Then network core

nrfjprog --recover --coprocessor CP_NETWORK

Then try flashing the program.

If you have custom device, they you have to make sure device is properly powered (Programming an external board).

Thanks.

Kazi