UART Communication

alexxowo

Hi everyone, recently i get a Firefly ROC 3566-PC. I flashed it with Ubuntu 18.04, and i want create an UART communication with one microcontroller. I'm using this Embedded board as central PC, to work with AI using the RKNN, but, i need an UART communication between this board, and microcontroller board (Designed by own)..
In the  /dev/, i see /dev/ttyFQI0 and /dev/ttyS0, but, i dont get any information in the pins of attached for UART.
I'm new using these microprocessor, i used raspberry and microcontrollers, but in this case, i'm new in this plaftform for embedded systems.
I recent see about modify dts files in kernel, is necessary? pyserial is compatible with this board?

时间的蝴蝶

You need to modify dts to enable serial port function. The serial ports available on the expansion port(J1) are uart3/uart5/uart9.

It will be easier to configure uart3, as follows:
&uart3 {
         status = "okay";
};

Schematic: https://en.t-firefly.com/doc/download/93.html#other_385

Pablo86

EDIT: I solved my problem