ttyTHS2 is not working

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin Nano
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Hello NVIDIA team,

we are using l4t 36.3 with jetson Orin nano SOM along with our custom board.

we observed the ttyTHS2 uart port is not working.
we are not able to do at least the loop-back test TX<->RX,
basically the signals are not seen with TX in oscilloscope.

please help us to make it fix.

FYI: ttyTHS1 is working fine and able to do loopback test also.

logs from demsg:

[    9.180100] 3100000.serial: ttyTHS1 at MMIO 0x3100000 (irq = 112, base_baud = 0) is a TEGRA_UART
[    9.194060] 3140000.serial: ttyTHS2 at MMIO 0x3140000 (irq = 113, base_baud = 0) is a TEGRA_UART
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Hi bharath.gk,

There’s only 3 UART interfaces available on Orin Nano.

3140000.serial is not available for Orin Nano.
How did you connect them on your custom board?

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

4

the 3 are ttyTHS, ttyTHS2 and debug uart right?
UART0, UART1 and UART2.

if above is wrong, please reply us which are those 3 uarts.

[quote=“KevinFFF, post:3, topic:320119”]
How did you connect them on your custom board?
[/quote] actually it was not connected, lines are brought up to wifi-bt module, as for pinmux sheet we found these 99(TX) and 101(RX) lines are available for uart

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You can refer to Jetson/L4T/peripheral/ - eLinux.org for their mapping.

The number of /dev/ttyTHS* is determined by aliases in device tree.
Please just refer to their address.
The available UART for Orin Nano are 3100000.serial, 3110000.serial and debug UART

1 Like
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thank you @KevinFFF , we will verify and let you know the results

7

thank you @KevinFFF , we will verify and let you know the results

and also please share link to document for information about uarts

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@KevinFFF , is it possible to use 3100000.serial for ttyTHS2 by configuring in dts files?

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You can refer to Jetson Orin Nano Developer Kit Carrier Board specification which can be downloaded from Jetson Download Center | NVIDIA Developer

Yes, please share your full device tree and dmesg for further check.

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