how to use TX2 serial port?(except the serial on J17)

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

I want to use TX2’s serial port to communicate with other devices.
I already use the UART on J17(ttyTHS2), and i need another serial port.
The serial port on J21 is a serial console, i don’t know how to use it as a common serial port to communicate with other device.
Does anyone know ow to do it?
Or is there anyother serial port to use more conveniencely?

2

Hi zhujx_linux,

If that pin is configured as uart pin, then it would be a ttyTHS under /dev.

ubuntu@nvidia-desktop:~$ dmesg |grep ttyTHS
[    3.622662] 3110000.serial: ttyTHS1 at MMIO 0x3110000 (irq = 37, base_baud = 0) is a TEGRA_UART
[    3.623893] c280000.serial: ttyTHS2 at MMIO 0xc280000 (irq = 38, base_baud = 0) is a TEGRA_UART
[    3.625150] 3130000.serial: ttyTHS3 at MMIO 0x3130000 (irq = 39, base_baud = 0) is a TEGRA_UART

Please try to use that interface.

3

i have tested all the three ttyTHS,none of them is the serial port on J21.

4

You can also reference to below topic.

https://devtalk.nvidia.com/default/topic/1066498

5

i want to know how to disable the serial console?

6

Why do need to disable it? You just need to modify the status to disable to disable it.

serial@xxxxxx{
                compatible = "nvidia,tegra186-hsuart";

                dma-names = "rx", "tx";
                clocks = <0x10 0x38 0x10 0x10d>;
                clock-names = "serial", "parent";

                reset-names = "serial";
                status = "okay";
                nvidia,tolerance-low-range = <0x0>;
                nvidia,tolerance-high-range = <0x4>;
                nvidia,adjust-baud-rates = <0x1c200 0x1c200 0x64>;

        };