Nothing on debug UART Orin NX 16GB on Orin Nano devkit

Autonomous Machines Jetson & Embedded Systems Jetson Orin NX
1

Hi,
I’m using Orin NX 16GB on Orin Nano Devkit carrier board. Flashed JP 6.1 from SDK Manager.
Everything works just fine, except I don’t see any debug log output on Debug UART (J14 button header 12 pins).
Is the debug log enabled by default on JP 6.1 for Orin NX? Or any idea to get debug log?

Thank you.
Linh

3

Hi Hnil.DN,

Yes, it should be enabled by default.
Please share with us how do you connect it on J14 and how do you configure it from your host.

You can refer to the following instruction to capture them.
Jetson Nano & NX Style - Serial Debug Console - JetsonHacks

4

Hi Kevin,

I have UART TTL - USB, connected TTL to GND, TX and RX pins on J14 of carrier board. On the host I use 115200 baudrate, 8N1, HW & SW flow control OFF.

I did this many times on Jetson Nano & TX2 NX & Xavier NX and they are all fine with debug log. Just Orin NX I don’t see any log on output.

5

Debug UART should be enabled by default.
Could you share the full dmesg on your board for further check?

Do you have another devkit to verify?

6

Hi Kevin,

This is the full dmesg of the board.
dmesg.log (60.6 KB)
Unfortunately I only have one Orin NX module + Orin Nano devkit carrier board. No other Orin kits.

7

Hi again,

I have tested with Orin Nano Devkit with Xavier NX module. The Debug UART works well.
The same hardware setup, I changed back to Orin NX module, nothing on the Debug UART.

8 
[    0.176719] printk: console [ttyTCU0] enabled

It should be enabled on your board.

Do you mean the following result in your test?
Orin NX module+ Orin Nano devkit board(p3768): No debug UART output
Xavier NX module+ Orin Nano devkit board(p3768): Has debug UART output

It is not the expected result to me since Xavier NX module should not work on p3768 devkit board.

9

Hi Kevin,

Do you mean the following result in your test?
Orin NX module+ Orin Nano devkit board(p3768): No debug UART output
Xavier NX module+ Orin Nano devkit board(p3768): Has debug UART output

Yes, that what I did. I just put Xavier NX on P3768, provide power and I saw bootloader starts printing on UART. That’s it.

However, I’m thinking that the Debug UART signals on my Orin NX module has issue. I’m trying to get another Orin NX module to test. I need to bringup a custom carrier board, so Debug UART is important.

Thank you.

10

Okay, if your issue only happens on specific Orin NX module, it may be caused from HW damage.
Please help to perform RMA.