How to Map UARTE to physical pins?

[Learner]

Hello,

I am a newby to the nRF5340 and Zephyr and I am stuck. I would like to know how to map physical pins to a particular UARTE.

I have read in the user manual OPS_v0.6.1 that this can be configured using these registers PSEL.RXD, PSEL.CTS, PSEL.RTS and PSEL.TXD but I am not sure how.

Is there a tutorial or a sample example where this is illustrated?

Thank you.

[Learner]

Hi Carl,

I am sorry to be a pain but I still cannot see how you can use the registers PSEL.RXD, PSEL.CTS, PSEL.RTS, and PSEL.TXD to map the different signals (RXD, CTS...), to physical pins.

Please can you give an example on how you would use these registers to map RXD, CTS,... signals to physical pins?

Kind regards

Mohamed

[Carl Richard]

Hi again!

It's fine! This happens in the driver, <sdk_root>\zephyr\drivers\serial\uart_nrfx_uarte.c, where the Devicetree(DT) configuration is applied to the UART instance. We do not have any examples on using the registers directly, unfortunately.

Best regards,
Carl Richard

[Learner]

Thank you Carl,

I have read the OPS_v0.6.1 again and the penny has finally dropped . I can now see how the PSEL.RXD, PSEL.CTS, PSEL.RTS, and PSEL.TXD can be used to map the different signals (RXD, CTS...), to physical pins.

Thank you for being patient with me.

Kind regards

Mohamed

[Carl Richard]

Good to hear! You got it right! 

It was my pleasure. 

Best regards,
Carl Richard