nrf53 device tree uart

Question

Hello,

For my board i would like to remap uart to pin on GPIO PORT 1.

Current:

&uart0 {
   status = "okay";
   current-speed = <115200>;
   tx-pin = <20>;
   rx-pin = <22>;
   rts-pin = <19>;
   cts-pin = <21>;
};

Requirement:

&uart1 {
   status = "okay";
   current-speed = <115200>;
   tx-pin = <&gpio1 10 0>;
   rx-pin = <29>;
   rts-pin = <0>;   /* not used */
   cts-pin = <0>;   /* not used */
};

My problem is that I don't know the format for specifying a gpio on port 1. By default, when i set <10> it's for GPIO 0. But i need GPIO 1.

Can you guide me ?

Corentin · Answer

Found answer: need to used offset

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/reference/devicetree/bindings/i2c/nordic,nrf-twi.html?highlight=sda%20pin

Example:

The SDA pin to use.

For pins P0.0 through P0.31, use the pin number. For example,
to use P0.16 for SDA, set:

    sda-pin = <16>;

For pins P1.0 through P1.31, add 32 to the pin number. For
example, to use P1.2 for SDA, set:

    sda-pin = <34>;  /* 32 + 2 */