How do I use pins 26 as tx and 27 as rx for UART1(nRF9160)?

[xinjiang]

This is nrf9160dk_nrf9160ns.overlay:

&uart1 {
	current-speed = <115200>;
	status = "okay";
	tx-pin = <26>;
	rx-pin = <27>;
	rts-pin = <14>;
	cts-pin = <16>;
};

Uart1 does not work properly. Please ask me how to configure it.

[Didrik Rokhaug]

Hi,

 

Uart1 does not work properly.

 What do you mean by that?

What behavior do you see?

What behavior do you expect?

By default pins 26 and 27 are used as RTS and CTS pins by UART0. At a minimum, you will have to change that.

What board are you using?

On a DK, those pins will be routed to the RTS and CTS pins on one of the debugger chip's UART interfaces. Those pins are not routed to the headers, so you will not really bea ble to use them for anything useful without also changing the board controller firmware.

Best regards,

Didrik