How to use 1M UART in nRF5340 DK board

RE: How to use 1M UART in nRF5340 DK board

Øivind — Wed, 17 Nov 2021 10:36:20 GMT

Ok,

The overlay file should have the same name as your board, and be placed in the project folder.
When you build the project, there should be a line near the top of the build log similar to:
"Using overlay file: nrf5340dk_nrf5340_cpuapp.overlay"

Did you remember to remove the previous changes you made while trying to set the speed to 1000000?
If not, try that.

Make sure that you re-open the project in SES, or click Project->Run CMake after making changes to overlay files or prj.conf.

Also make sure that the other end, terminal on connected computer for example, is also set up for 1000000 baud rate.

RE: How to use 1M UART in nRF5340 DK board

JIYEON — Wed, 17 Nov 2021 01:57:50 GMT

Hi,

I followed this link to create overlay file.

https://devzone.nordicsemi.com/f/nordic-q-a/81140/can-t-open-overlay-file-in-segger

But it doesn't work.

What I add to overlay is

&uart0 {
 current-speed = <1000000>;
 tx-pin = <20>;
 rx-pin = <22>;
 rts-pin = <19>;
 cts-pin = <21>;
};

RE: How to use 1M UART in nRF5340 DK board

Øivind — Tue, 16 Nov 2021 13:39:39 GMT

Hi,

Try changing the property using an overlay file instead. The overlay file should contain something like this:

&uart0 {
    current-speed = <1000000>;
};