The CDC of FX3 with composite device (UVC + usb-uart) can not recognition in linux

[zomi_4384236]

HI,there.

the composite device（UVC+usb-uart  ----they are all use IADs） is work in windows，but when i use it in linux ,it just only one device can work.

dmesg | tail -20

hope someone can help me to solve my doubt.

Many thanks in advance!

[Hemanth]

Hi,

Did the cdc interface enumerate correctly? which driver is loaded on the Linux side?

Did you try Minicom?

Regards,

Hemanth

[zomi_4384236]

Hi ， thanks for your reply.

How to check the CDC enumerate on the Linux side,Is there application note as a example?

My project is a industrial camera, use UVC and USB-UART. It all works very good on the windows OS side, 

But on the Linux(Ubuntu) the UVC is OK, but the USB-UART  is not recognized. 

I want to know what is the difference between Linux os and windows os  on the USB-UART.

Which kind of driver needs to be installed in Linux.

I can try Minicom.

[FeYu_1508691]

Sorry for reply something else.

Could tell me which UVC and usb-uart firmware are you using?

I have found sample in the forum, but it could not run well.

Image went well at first, but freezed after a few seconds.

UVC + USBUART Example

And also I have checked the document about how to add CDC, and I think it is similar to the example I wrote in the last line.

Adding Communication Device Class Interface to FX3 Firmware - KBA229099

[Hemanth · Accepted solution]

Hi,

lsmod command can be used to check if the cdc_acm module is loaded.

If it does not enumerate as expected, please connect any USB Serial devices like https://www.cypress.com/documentation/development-kitsboards/cyusbs232-usb-uart-lp-reference-design-... Or the micro USB connector in the following kit can also be used to get a USB-UART interface https://www.cypress.com/documentation/development-kitsboards/cyusb3kit-003-ez-usb-fx3-superspeed-exp...

If you have any of the above kits/ any other USB-UART devices, please connect to Linux and check if they are working fine. If yes, then taking an USB trace would help to know what is the difference.

Regards,

Hemanth