I asked for suggestions on this problem just appending it to an old topic but so far no replies so I try again on a new topic.
Have used VM167 for some years in a customer project.
Sometimes one card is connected some times two.
Up till now everything works just fine. But since USB 3 nowadays is the most common on new machines we have a growing problem.
Using one card works seams to be OK, problem comes when two are connected. Sometimes I can get connection to both cards, depending on order of insertion of USB plugs and to what ports on the USB hub.
The problem occurs only on machines having USB 3.0 ports, windows 10 machines having USB 2.0 is OK.
I have tested with just bare VM167 boards and also updated drivers to latest. The problem is also present when running the demo program.
Since my customer is using a lot of VM167 cards this problem is of great concern.
Grateful for any suggestions !