Jetson Orin NX16gb - How i can use the /dev/ttyTHS2 serial communication?

[Henry_Alfred55]

First of all, which pins correspond to /dev/ttyTHS2?

I can use /dev/ttyTHS1 normally but I don’t know how to use the THS2 one.

Does anyone have experience with this?

[KevinFFF]

Hi hayri.akif101,

Are you using the devkit or custom board for Orin NX?
What’s the Jetpack version in use?

Please share the full dmesg and device tree for further check.

[Henry_Alfred55]

hi kevin,
On the orin nx is the Jetpack version 6.1 with Ubuntu22.04.4 installed.
reComputer J401 - Carrier Board J4012

Here the full dmesg and the full device tree:
device-tree.txt (171.5 KB)
dmesg.txt (60.6 KB)

[KevinFFF]

There are 3 physical UART interfaces available on Orin NX.

1. uartb@3110000 => To M.2 Key E
2. uarta@3100000 => General UART
3. /dev/ttyTCU0 => Debug UART

We don’t suggest using debug UART since it outputs the debug messages from different firmwares.

[    1.748161] 3100000.serial: ttyTHS1 at MMIO 0x3100000 (irq = 112, base_baud = 0) is a TEGRA_UART

The above UART has been enabled in your case.

Are you trying to enable the first one(uartb@3110000)?
If so, you can enable it from the device tree.

@Henry_Alfred55

device-tree.txt (171.5 KB)

You’ve shared the result when you run dtc command to decompile the DTB.
Please share device tree file (extracted_dtb.dts) instead.