Changing default UART0 pins makes console print gibberish

[newUser]

I would like to print debug messages to a PuTTY console. With the evaluation kit, this is very easy. It is connected to my PC via a USB cable, and I listen to one of the virtual com ports that is intended for the UART communication. It works.

Now for my custom board, I have changed the pins in the common.dts file. I see characters being printed to the PuTTY console, but they are not the correct ones. I print every 5 seconds, and every 5 seconds I see gibberish being printed.

Am I missing a part of the configuration, or is my hardware faulty?
I did not change the baudrate settings.

Thank you!

[Håkon Alseth]

Hi,

 

Which UARTx interface are you using? I assume UARTE0, but have to ask.

Which pins are being used, and have you checked if anything else in your system is trying to use the same pins?

 

Is it printing only jibberish, or is it "a bit off"?

 

Kind regards,

Håkon

[newUser]

Hi again Håkon,

Håkon Alseth said:

Which UARTx interface are you using? I assume UARTE0, but have to ask.

Yes, I am using UART0. I did not change the configurations in this regard. In short:
- I copied the board folder of the nRF9160DK
- Changed the file names and references
- Changed the UART0 TX and RX pins in the common.dts file
- Remapped some GPIO pins

So for example, I did not change the console to UART0 mapping.

Håkon Alseth said:

Which pins are being used, and have you checked if anything else in your system is trying to use the same pins?

I am using TX pin 27. I have done a in-file search through the whole board folder and my .c file, and I did not find any other hits for this pin.

Håkon Alseth said:

Is it printing only jibberish, or is it "a bit off"?

It is truely jibberish. The actual output is "▒▒▒Q▒▒57▒▒", but I would expect "Button pressed".