Jetson TX1 usb to serial device connection probelm

Autonomous Machines Jetson & Embedded Systems Jetson TX1
1

Hello everyone,

I have bumped into some problems regarding USB connection, I’ve tried the following commands but I still can’t get a connection working:

＄ lsusb

then I got

Bus 002 Device 003: ID 05e3:0616 Genesys Logic, Inc. hub
Bus 002 Device 002: ID 0955:09ff NVidia Corp. 
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 028: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 030: ID 1a86:5523 QinHeng Electronics CH341 in serial mode, usb to serial port converter
Bus 001 Device 005: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

I’m sure that the device I’m connecting to is: Bus 001 Device 030: ID 1a86:5523 QinHeng Electronics CH341 in serial mode, usb to serial port converter.
I have also tried the following:

$sudo modprobe usbserial vendor=0x1a86 produbt=0x5523
dmesg

Which apparently should return

usbserial_generic 1-1:1.0: generic converter detected
usb 1-1: generic converter now attached to ttyUSB0
usbcore: registered new interface driver usbserial_generic

based on the examples I’ve seen, showing connection to ttyUSB0, but in my case I got:

[ 4534.021812] usb 1-3.1: new full-speed USB device number 30 using xhci-tegra
[ 4534.047806] usb 1-3.1: New USB device found, idVendor=1a86, idProduct=5523
[ 4534.054825] usb 1-3.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0

Does this mean that I have made a successful connection?

The hardware I’m using is: nvidia jetson tx1
Ubuntu version 16.04

I am able to connect to ttyUSB0 from my laptop to the device, can some one help me with this issues?
Thank you very much!

2

Hi hankkevin,
Do you mean you connect QinHeng Electronics CH341 to TX1 but TX1 cannot enumerate the device?

3

Hi DaneLLL,

Yes, I canʼt enumerate the devince.

I tried the following tutorial

then

$ dmesg

I got

[  139.041228] usb 1-3: USB disconnect, device number 3
[  142.540149] usb 1-3: new full-speed USB device number 4 using xhci-tegra
[  142.567553] usb 1-3: New USB device found, idVendor=1a86, idProduct=5523
[  142.574599] usb 1-3: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[  143.667121] ch341: version magic '4.4.38-tegra SMP preempt mod_unload aarch64' should be '4.4.38 SMP preempt mod_unload aarch64'

Then there is nobody discussing about this question. Please help me.

4

From the log, your device should be enumerated. We don’t have much experience in serial communication. Hope below search result can help you
https://devtalk.nvidia.com/search/more/sitecommentsearch/USB%20serial/

5

Did you set CONFIG_LOCALVERSION in your configuration (in the “.config” file)? This excerpt says this was skipped:

version magic '4.4.38<u><b>-tegra</b></u> SMP preempt mod_unload aarch64' should be '<u><b>4.4.38</b></u> SMP

When a kernel boots the “uname -r” command will be the base kernel version, plus the CONFIG_LOCALVERSION will be appended. The Jetson ships with “4.4.38-tegra”, and thus it is kernel “4.4.38”, and that kernel was compiled with CONFIG_LOCALVERSION of “-tegra”. It matters because kernels search for modules at “/lib/modules/$(uname -r)/”, and if this is off, then the kernel will either not find the module, or will think the module was compiled against a different kernel.

Here is a summary of kernel compile details:
https://devtalk.nvidia.com/default/topic/1038175/jetson-tx2/tx2i-wifi-support/post/5274619/#5274619