NRF52832 change UART pin configuration on the fly

[Nick_RA]

Hi

I read in another post a while ago a suggestion of changing GPIO pins allocated to the UART (which I can't find now) as a way for implementing multiple UARTs. I would like to send data to more than one UART, so is it practical to swap the UART TX pin before sending? This is transmit only so I don't need to worry about RX.

If so, what is the best way of going about it? I guess I could reinitialise the UART every time but that seems a bit overkill to me.

I'm currently using printf to send but I can change that if need be.

An alternative would be some external logic driven by GPIOs to route the data although I'd like to do it by code if possible.

[Simonr]

Hi

I think you will have to uninit the UART and then reconfigure the pins before reinitializing the UART again. As to how you trigger this that is entirely up to you I guess. There's no "recommended" way to do this per se.

Best regards,

Simon

[Nick_RA]

OK thanks guys, changing the register worked for me, I just needed to set a flag in the uart callback to let me know when the uart was finished before switching.