I have the nRF52DK board and I am using that to reprogram the Sparkfun breakout. However, initially, I was using the Sparkfun Beefy UART device to flash the nRF52832 to begin my SPI project using BLE.
What happened: Firstly, I did something dumb.
Not getting the SPI example to work on the breakout board, I started diminishing the example's main loop to toggle an LED. This, of course, was being done at 3:30AM and I connected the LED to pin 8 and then the board can not be flashed.
In fact, the board does not acknowledge the initial transmission from the nrfutil.py utility.
Onto the nRF52 DK:
I can read the memory on the affected breakout board using the pin 19 interface of the evaluation board. I can erase the memory and write new memory. I even went so far to purchase another breakout board, savebin 512KB of working flash memeory and loadbin this file onto the affected board:
Nothing.
Failed to upgrade target. Error is: No data received on serial port. Not able to proceed.
Possible causes:
- bootloader, SoftDevice or application on target does not match the requirements in the DFU package.
- baud rate or flow control is not the same as in the target bootloader.
- target is not in DFU mode. If using the SDK examples, press Button 4 and RESET and release both to enter DFU mode.
Question:
Is there a low level checksum I can obtain that would indicate whether the board has a hardware failure?
Is the board truly bricked or can it be jump started somehow - like setting a PC register?
Is there a known flash bin file that will do some HelloWorld dance?
Destination green recycle?
Thanks
