Configuring UART1 from Scratch in Zephyr (Beginner Here)

[Anassoumi]

Hey everyone!

I’m working on a project using Zephyr with an nRF5340 board and trying to configure UART1 completely from scratch. Most tutorials I’ve found only cover UART0 (usually preconfigured as the console), but I’d like to set up UART1 for independent send and receive functionality.

One thing I find confusing is that, after loading a basic example like Blinky, the start addresses for UART1 and I2C seem to overlap  ?? 

I’ve set the status to "okay" in the device tree for UART1, but it’s still not working as expected , only the transmitting line that shows data on the oscillscope but the receiving line fails, when using interrup , the callback initialization just fail.

is there anything else that you think i'm missing ? is there a video that show how it can be configured from the device tree visua editor ? or the device tree from scartch ? thank you 

[AHaug]

Hi,

You're right in that most demos cover only UART0 and not UART1. 

One thing I find confusing is that, after loading a basic example like Blinky, the start addresses for UART1 and I2C seem to overlap  ?? 

If both instances (i2c and uart1) use the same hardware when out of the box you will have to disable the i2c device in overlay for your project.

Do you get any build warnings or errors when attempting to build? If so, what does it say?

FYI both https://academy.nordicsemi.com/courses/nrf-connect-sdk-fundamentals/ and https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/ are good resources when getting started with nRF Connect SDK and Zephyr RTOS

Kind regards,
Andreas

[Anassoumi]

Thanks for your reply Andreas , I have managed to enable the uart1 via the device tree (thanks to your tutorials suggestion) ,the only issue ihave is that i'm connecting the nordic board to another mcu , but i noticed that the data being received is out of sync , even thought the configuration matches like baudrate etc .

[AHaug]

Glad to hear that!

Anassoumi said:

connecting the nordic board to another mcu , but i noticed that the data being received is out of sync , even thought the configuration matches like baudrate etc .

Could you supply some images, logs and preferably have a look at the transport with a logic analyzer as well?

Kind regards,
Andreas