nrf5340 custom board programming issue

RE: nrf5340 custom board programming issue

Vidar Berg — Mon, 31 Jul 2023 12:44:42 GMT

Does your build include a bootloader too? In that case, make sure the same configurations are applied to the bootloader as well.

RE: nrf5340 custom board programming issue

sguitton01 — Mon, 31 Jul 2023 12:42:40 GMT

I was able to retrieve the board with the solution you sent me.
Though afterwards if I reprogram after (with

# CONFIG_BOARD_ENABLE_DCDC_APP is not set

# CONFIG_BOARD_ENABLE_DCDC_NET is not set

# CONFIG_BOARD_ENABLE_DCDC_HV is not set

in .config)

I still get the issue. Am I doing something wrong?

RE: nrf5340 custom board programming issue

Vidar Berg — Mon, 31 Jul 2023 07:31:16 GMT

I'm afraid there isn't an easy way to recover the boards that have been 'bricked'. The only solution I'm aware of is to externally supply voltages to the decoupling pads mentioned by the forum user in this post: RE: external nRF5340 getting locked up

RE: nrf5340 custom board programming issue

sguitton01 — Mon, 31 Jul 2023 07:25:15 GMT

No they are not, I will add it.
Is there a way to recover the boards that are stuck?

Thank you,

Sylvain

RE: nrf5340 custom board programming issue

Vidar Berg — Mon, 31 Jul 2023 07:18:50 GMT

Since you don't have the DCDC inductors mounted, please check if the following symbols are disabled in your app core build:

CONFIG_BOARD_ENABLE_DCDC_APP=n
CONFIG_BOARD_ENABLE_DCDC_NET=n
CONFIG_BOARD_ENABLE_DCDC_HV=n

You can see if the symbols are set in the ".config" output.

RE: nrf5340 custom board programming issue

sguitton01 — Mon, 31 Jul 2023 07:15:59 GMT

The DCDC inductor is not mounted, but the 32kHz crystal is mounted.
And yes I can measurethe reset pin volatage and it is pulled low.

Thank you,

Sylvain

RE: nrf5340 custom board programming issue

Vidar Berg — Fri, 28 Jul 2023 16:01:24 GMT

Hello Sylvain,

Do you have the optional DCDC inductors and LF crystal mounted on your board? Also, are you able to measure the voltage on the reset pin to confirm if it is pulled low?

Best regards,

Vidar