NRF52840 Custom Board - program only runs when debugging

RE: NRF52840 Custom Board - program only runs when debugging

bpolito8 — Thu, 01 Feb 2024 01:36:34 GMT

Thanks Simonr. I had actually tried that fix initially upon seeing your previous message with no luck. I had the nrf52840dk_nrf52840 board selected for my build configuration (apologies for not mentioning this initially), and I imagine this was locking me into some sort of DCDC or LF crystal configuration that did not match my board. Once switched to a custom board configuration my project is running without the debugger. Thanks!

RE: NRF52840 Custom Board - program only runs when debugging

Simonr — Wed, 31 Jan 2024 08:29:57 GMT

It's most likely the CONFIG_BOARD_ENABLE_DCDC=y that is set in your project's config file then. Set this =n to disable the DCDC regulator, as that should help here.

Best regards,

Simon

RE: NRF52840 Custom Board - program only runs when debugging

bpolito8 — Mon, 29 Jan 2024 19:18:10 GMT

devzone.nordicsemi.com/.../nRF52840_5F00_module_5F00_schematic.pdf Thanks for the reply. Here is a portion of the schematic for reference. I think you are correct that the project is configured to use the DCDC regulator, and the board is missing the DCDC components. Is this the case? If so, how can I disable the DCDC regulator in my project?

RE: NRF52840 Custom Board - program only runs when debugging

Simonr — Mon, 29 Jan 2024 13:40:06 GMT

That last reply seems to have been from a bot. Don't pay it any attention as it has been reported.

Regarding your issue, issues like this where custom boards only run in debugging mode when connected to a DK is usually either due to the DCDC components missing and the project being configured to use the DCDC regulator, or that the external LF crystal is not mounted/loaded incorrectly.

Can you provide a .pdf file of your schematics so I can take a look?

Best regards,

Simon

RE: NRF52840 Custom Board - program only runs when debugging

bpolito8 — Mon, 29 Jan 2024 03:10:57 GMT

Hey, thank you for the reply. Is the debug configuration the same as the build configuration?

Also, I may be misunderstanding your comment, but I am not sure that I have any debug configuration issues since I can debug the project on my custom board, in fact this is the only way I can get the project to run on the custom board. Flashing the binary to the custom board seems to work fine during debugging, but the program won't start when I choose the "flash" options instead of the "debug" option.

RE: NRF52840 Custom Board - program only runs when debugging

williseugene333 — Mon, 29 Jan 2024 01:37:54 GMT

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