Cannot get blinky working with nRF52805 on custom board

RE: Cannot get blinky working with nRF52805 on custom board

Menon — Fri, 16 Aug 2024 11:36:10 GMT

Hello,

I'm glad to hear that the issue has been sorted out.

Kind regards,
Abhijith

RE: Cannot get blinky working with nRF52805 on custom board

ParkerMcD — Thu, 15 Aug 2024 16:28:58 GMT

I think it might have just been the fact that the MCU wasn't getting reset properly after programming. I switched the optimization back to the project default and I was still able to flash and run the code without the previous issues.

RE: Cannot get blinky working with nRF52805 on custom board

Menon — Wed, 31 Jul 2024 19:14:52 GMT

Hello,

Your software part (at least what you have shared) looks good to me. It might be something related to hardware, or maybe power cycling has reset peripherals and cleared states that might have been affected by previous runs, which made the board work. Optimizing for debugging configuration is ideal in the development stage but not when it comes to production/pre-production.

Have you tested any other samples inside the custom board, and if so, how did it go?

Kind regards,

Abhijith

RE: Cannot get blinky working with nRF52805 on custom board

ParkerMcD — Mon, 29 Jul 2024 20:23:45 GMT

Hi Abhijith,

The nRF52805 is wired to use the internal LDO, not the DC-DC converter on this board. There is nothing in the prj.conf that enables the DC-DC converter, just the GPIO. I tried adding CONFIG_BOARD_ENABLE_DC_DC=n, but it wouldn't compile. Also didn't see any other configuration options for enabling/disabling the nRF DC-DC converter.

Thanks,

Parker

RE: Cannot get blinky working with nRF52805 on custom board

Menon — Mon, 29 Jul 2024 09:54:34 GMT

Hello,

I'm glad to hear that you're making progress.
To ensure everything is set up correctly, could you confirm whether your custom board includes a DC-DC converter? Additionally, please check your `prj.conf` file to see if there is a configuration enabling the DC-DC converter. You might want to try disabling it by setting `CONFIG_BOARD_ENABLE_DC_DC=n` and see if that resolves the issue.

Kind regards,

Abhijith

RE: Cannot get blinky working with nRF52805 on custom board

ParkerMcD — Sat, 27 Jul 2024 17:06:57 GMT

I'm not entirely sure what the fix was, will have to do some more careful experiments, but I got the code to run after changing the build configuration optimization level to "Optimize for debugging" and power cycling the board. I might have inadvertently changed something else that I'm unaware of. Or maybe the MCU wasn't resetting properly after getting flashed.

RE: Cannot get blinky working with nRF52805 on custom board

Menon — Thu, 25 Jul 2024 14:00:09 GMT

Hello,

I don't see any issues with your code or device tree; everything looks good to me. You have configured the pin as `GPIO_OUTPUT_ACTIVE`, which means the LED should be ON initially. If the LED is off by default, you should use `GPIO_OUTPUT_INACTIVE` instead.

Kind regards,

Abhijith