UART Pin Change with DTS Overlay

[Evan Colt]

Hi,

I am trying to change the pins used from UART from the default pins TX:6, RX:8 to TX:9, RX:10

I am struggling to figure out how to do this as whenever I update my .overlay file for my device tree I go from a working UART implementation to seeing no data pass between the devices.

Here is the DTS code I am using to make this pin change:

// &pinctrl {
//     uart0_default: uart0_default {
//         group1 {
//             psels = <NRF_PSEL(UART_TX, 0, 9)>,
//                     <NRF_PSEL(UART_RX, 0, 10)>;
//         };
//     };
//     /* required if CONFIG_PM_DEVICE=y */
//     uart0_sleep: uart0_sleep {
//         group1 {
//             psels = <NRF_PSEL(UART_TX, 0, 9)>,
//                     <NRF_PSEL(UART_RX, 0, 10)>;
//             low-power-enable;
//         };
//     };
// };

Is there something I am missing here?

Here is what the device GUI looks like before and after the change-

Before (UART works correctly):

After (UART not working):

Thanks!

[SwRa]

Hi Evan,

Are you using the 52-DK.? If you see the backside of the board, you can see the pins that are already in use.. So could you try with any other free gpio.?

Regards,

Swathy