I am using custom board with MDBT53 and I'm stuck at a point where board does not even let me to connect the debugger so that I can refresh firmware.
I added MCU boot code into my existing firmware and once I flashed this mcu boot code to my board I got my board into state that its not powering up the board and not letting me to connect the debugger. When I try to flash the code via JFlash v8.28 it gives following error.
Then I search and got some idea from forum that if I use nrfutil or nrfjprog I can recover it but I will share the response for these commands as well which seems not working for me.
nrfjprog --recover --coprocessor CP_NETWORK [error] [ nRFXX] - Device does not have an ARM debug port. [error] [ nRFXX] - Device does not have an ARM debug port. [error] [ Client] - Encountered error -3: Command enable_coprocessor executed for 6 milliseconds with result -3 ERROR: NETWORK coprocessor is invalid on UNKNOWN family devices [error] [ Worker] - NETWORK is not a valid coprocessor for the device ERROR: An invalid argument was provided. Use --help for a list of valid ERROR: arguments. NOTE: For additional output, try running again with logging enabled (--log).
When run nrfutil device recover --core Network command it gets following error:
nrfutil device recover --core Network
❌ Failed to recover 801032098, Device error: A timeout occured while handling debug power: Timed out trying to power sys and debug region
Error: One or more recover tasks failed:
* 801032098: Device error: A timeout occured while handling debug power: Timed out trying to power sys and debug region (Generic)
Then I also tried to connect the reset pin of board with vdd to which makes the nrf reset I believe. Then again it does not work. I get the following response with this setting. Even if I make reset to GND then again get the same response.
nrfutil device recover --core Network ❌ Failed to recover 1050083678, Device error: Failed to write DebugPort register 0x08: Unknown Error in J-Link DLL (error code =-1) Error: One or more recover tasks failed: * 1050083678: Device error: Failed to write DebugPort register 0x08: Unknown Error in J-Link DLL (error code =-1) (Generic) nrfjprog --recover --coprocessor CP_NETWORK [error] [ Client] - Encountered error -102: Command connect_to_emu_with_snr executed for 732 milliseconds with result -102 ERROR: Unable to connect to a debugger. [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.
Can you suggest or tell me anything whats going on and how to fix it?
Thanks
