Change pinning of the UART0

RE: Change pinning of the UART0

user81283 — Thu, 12 May 2022 12:06:35 GMT

Yes, you can take a look at build/zephyr/zephyr.dts

You can also attach it here with Insert->Image/video/file and I can take a look at it as well.

How does your nrf5340_cpunet_reset.c file look now?

RE: Change pinning of the UART0

user99936 — Thu, 12 May 2022 11:20:16 GMT

Well, that didn't do much. Also, I still have some issues which looks like there still is a pinning issue. Is there a file generated which contains the complete pinning where I can verify that the changes has been registered?

RE: Change pinning of the UART0

user81283 — Thu, 12 May 2022 10:39:36 GMT

Yes, try adding CONFIG_LOG_PRINTK=y to your prj.conf, I believe that may solve that specific issue.

RE: Change pinning of the UART0

user99936 — Thu, 12 May 2022 09:27:58 GMT

Hi!

Thanks for your reply. Just tested it, but I got an unexpected behaviour: Some extra logging from the bootloader and not any logging (using printk) from the program itself in the NRF TERMINAL window. I'm a bit confused here. Is the printk using uart0 by any chance, and that's why the logging functionality is broken when redefining the pins and still using the nrf5340dk board?

Thx!

RE: Change pinning of the UART0

user81283 — Tue, 10 May 2022 14:16:16 GMT

Hi,

These specific pins are slightly more complicated to modify compared to other pins. Please take a look at my answer in this case: https://devzone.nordicsemi.com/f/nordic-q-a/81892/uart0-tx-rx-pin/340312#340312

After you have changed the pins you will need to re-build and re-flash.

The process to modify these pins has been simplified on the master branch of the SDK, so I expect this to be easier on future versions.