Custom Board Programs, Cannot Debug, Firmware Doesn't Run

RE: Custom Board Programs, Cannot Debug, Firmware Doesn't Run

hammie4 — Mon, 17 Jun 2019 18:02:41 GMT

This was a great suggestion, and Nguyen's suggestion #2 seems to be correct. When flashing through Ozone, the softdevice/MBR wasn't being loaded properly onto the device. The board that started working had been flashed with an old project using a different method from Ozone, and this was retained in flash when re-flashing using Ozone. The boards are working now.

Thank you both for your help! Nordic support is the best.

RE: Custom Board Programs, Cannot Debug, Firmware Doesn't Run

haakonsh — Mon, 17 Jun 2019 11:49:27 GMT

Can you read out the flash of one working device and compare it to a non-working device?

RE: Custom Board Programs, Cannot Debug, Firmware Doesn't Run

Nguyen Hoan Hoang — Sat, 15 Jun 2019 21:39:48 GMT

It could be soldering issue too. Try reflow it a bit.

RE: Custom Board Programs, Cannot Debug, Firmware Doesn't Run

hammie4 — Sat, 15 Jun 2019 21:35:05 GMT

Thank you for the quick response!

The firmware does load and run on a different custom dev board. Also, of the three new custom boards, one of them did start running and executing the firmware, so it seems unlikely to me to be a problem with the firmware itself. I have no idea why the one board miraculously started working after initially not working, and why the other two continue to not function. I was leaning toward it being something wrong with the crystal, but since you say it is possible to execute code without it, that seems less likely.

Mysterious!

RE: Custom Board Programs, Cannot Debug, Firmware Doesn't Run

Nguyen Hoan Hoang — Sat, 15 Jun 2019 14:13:15 GMT

1) Nope, 32MHz is not require to flash and executing simple code. It is required if you use the radio

2) Something is not right with your firmware. Either you did not map the memory correctly or your firmware requires the softdevice.

3) No, the 32MHz is by default off.

Have you tested your firmware on a known reference working board such as the DK ?