Problem getting USB running on Ultra96 v2 under UBUNTU 16.04.LTE VM

Question

Hello All, I am having trouble getting both my USB to work and my SDK to connect to my ULTRA96-v2 board under the UBUNTU 16.04 LTE VM,

I refer to the following course document: MPSoC_HW_2018_3_lab_2_v01_u96.pdf

and specifically to LAB 2 Experiment 4,

Page 36, Figure 51 – Select the Xilinx JTAG USB Device in Ubuntu if i click on the USB link as shown i usually get an error message

about the USB already being busy.

Also when i look in the /dev/ Directory i cannot find an ttyUSB1 entry, in fact i don't see

any USB entries at all. I can see under Windows 10 that the JTAG and USB UART has enumerated ...in my machine to USB serial port 10

Then when i try and run the program either in the debugger or just as a run application. i get an error about not being able

to find an A53 processor ..so basically no joy yet !

Has anybody else faced these issues and have any suggestions as to what is going wrong ?

Many thanks for any help,

Cheers Dr Barry H

ralphjy · Answer

Did you install the missing cable drivers? "Cable Drivers are no longer installed by this installer under Linux. See instructions in the Install Missing Cable Drivers section of this document."

See page 44 of the VirtualBox_Installation_Guide_2018_3_v1_12.pdf for installation instructions.

Also, were you careful to install Ubuntu 16.04.4 or 16.04.3? I had a problem when I just installed the the latest LTS version which was 16.04.6 when I did it. Xilinx is pretty serious about specific OS version compatibility. The problem occurred in Vivado in one of the later HW labs.

drbarryh · Answer

Hi Ralphyj, thanks for the reply and suggestions. Yes i did all of what you mentioned. I have a VM with UBUNTU 16.04.4 LTE installed and i did install the missing cable drivers. And then i checked my UBUNTU VM version...and sure enough : barry@barry-VirtualBox:/dev$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.6 LTS Release: 16.04 Codename: xenial It seems i have installed the wrong version then.....what a pain ! Is there any easy way to change the UBUNTU VM to 16.04.4 LTS or do i need to go through the entire VM installaion guide again ? Also, where should i get the correct version of UBUNTU from please ? I thought i had done it right the first time but must have clicked on the wrong link ! What happens under this VM is that i see the USB under windows and under the UBUNTU VM ...under Devices -> USB -> XILINX JTAG+serial (0700) but when i click on it and the look in /dev/ ls ttyUSB* .....i get nothing found .. Back to the drawing board ? cheers, Dr Barry

ralphjy · Answer

Hi Barry, Sometimes this stuff ends up being harder than it should be. I don't know of an easy way to downgrade minor versions. I usually just load the version that I want. You may have done that but if you are not careful and allow the OS to update, it will happily advance you to the next minor version. If you haven't loaded a specific version before, you need to search for the version that you want in the directory of older versions. In this case http://old-releases.ubuntu.com/releases/16.04.4/ . You have to wade through all the choices to get the version that you want which in my case was the 64bit desktop. Of course, this is not your USB problem. I did not have USB issues so I'm not sure what your problem is. Since you can see the USB port in Windows and installed the Ubuntu drivers and cannot see the USB device in Ubuntu, the only thing I can think of is that the USB interface either did not install or is not enabled in VirtualBox. Do you recall it asking to install drivers during installation of VirtualBox? Unfortunately, I am not a VirtualBox expert so maybe others can help. If you check the settings in your VM do you see a USB controller and is it enabled? Here is what I have for the VM I am running for a Minized Hackster tutorial: Hope you can get this fixed. Ralph

ralphjy · Answer

One caveat about using multiple VMs that I should mention. If you use a node locked license, each VM is treated as a separate host. Re-hosting is straightforward but makes moving between VMs aggravating. Good news is that if you are using Vivado Webpack or Vivado with Vitis, you won't have any issues. Also, floating or network licenses should work well.