RE: nRF52840 - DFU Mode won't start

Roxas — Thu, 30 Sep 2021 23:19:57 GMT

Solution: https://community.makerdiary.com/t/pitaya-go-dfu-mode/407

By: cmd

Real quick sanity check: I’m not sure that the CLI example uses the LED at all (at least not while it’s idle, perhaps it blinks on UART tx/rx?

That said, I had something similar happen to me a few times, and it almost always ended up being that I did something to the bootloader or the UICR registers when I was using other bootloaders.

I always like to start fresh with a chip I know is blank: pyocd erase -t nrf52840 --chip.
Then, re-flash the bootloader.
After that, re-flash blinky.
At that point, give the chip a kick: pyocd reset -t nrf52840 and it should start blinking.

RE: nRF52840 - DFU Mode won't start

Kenneth — Mon, 27 Sep 2021 11:37:43 GMT

Sorry, but I think this question is best directed to pitaya go support, we don't have any experience with this development plarform.

Kenneth