Jetson TX2 L4T version： cat /etc/nv_tegra_release # R32 (release), REVISION: 4.3, GCID: 21589087, BOARD: t186ref, EABI: aarch64, DATE: Fri Jun 26 04:34:27 UTC 2020 Question 1： In the /dev directory, there are so many serial device nodes like ttyGS0, ttySx, ttyTCU0, and ttyTHSx. I now know the de…

hello qulei159, please also check developer guide, Disable Console over UART . BTW, UART-7 is used for BPMP debugging by default, you may also modify the BPMP dts. please check discussion thread, Topic 54572 for the steps of enabling UART-7 as see-also. thanks

hello qulei159, Jetson TX2 bring five UARTs out to the main connector, please access Jetson TX2 Series OEM Product Design Guide , and check chapter [13.3 UART] for more details. thanks

Just as general information, the naming depends on the driver, plus possibly udev. Typically a USB based serial UART from FTDI (the most “out in the wild” UART) has a name like “/dev/ttyUSB#”. Jetsons usually have two drivers to pick from for their serial UARTs which are integrated: The one with a n…

hello: I added the following code to the device tree: serial@c290000 { compatible = “nvidia,tegra186-hsuart”; dma-names = “tx”; status = “okay”; }; Recompile the device tree and replace it. UART7 (D5, D8) is enabled, and it can be seen that the ttyTHS6 device node is generated through the dme…

Just a reminder: Don’t forget DMA on both tx and rx, e.g.: dma-names = "rx", "tx";

What is the correspondence between UARTx and device nodes

Robotics & Edge Computing Jetson Systems Jetson TX2

JerryChang March 23, 2021, 9:14am 4

hello qulei159,

please also check discussion thread, Topic 153941,
it shows an example of mappings for serial ports of ttyTHS*, and UART*
thanks

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What is the correspondence between UARTx and device nodes

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