USB Testing

[ryanjones]

I am looking for a basic and quick production test procedure for a USB 2.0 (with a Pass/Fail result).
I need to do a test to make sure the Host's USB function is working (i.e. signal integrity).
The host is CE embedded.
Do you have any advice or recommendations?

 

[MacGyverS2000]

Plug in a flash drive and transfer a file. Seriously.

Beyond that, there are specialized test equipment for true signal integrity checks, but be prepared to pay through the nose.

Dan - Owner

http://www.Hi-TecDesigns.com

 

[ryanjones]

"Plug in a flash drive and transfer a file. Seriously.": I Knew that!!! I just need more of a official confirmation.

"Beyond that, there are specialized test equipment for true signal integrity checks, but be prepared to pay through the nose": What specialized equipment are available to do this sort of testing? I was hoping that there is a simple tester that plugs into the USB port and gives me a Pass/Fail result...

 

[VEBill]

Since you're using Microsoft Windows CE, then perhaps the Microsoft USB Test Tool (MUTT) is applicable, but I've not confirmed this. Something to look into if you need that much test coverage.

For production test, one can often rely upon the previous sub-assembly tests and just test what's been touched in the last assembly steps. So if the uC itself has already been tested, then your production test might perhaps only need to be a quick go/nogo check of the wiring. In other words, you're not trying to requalify the port on each unit.

If you have enough space to include some production test code, then perhaps you could simply have an external USB driven display (Arduino or similar fun project) and you program the system to print "USB PASS" on the display when that specific display is connected (handshaking with a test code required). The text "USB PASS" would only exist on the UUT, not the test kit.

 

[MacGyverS2000]

Look up "USB physical layer compliance testing" and you will find a few pieces of test equipment that will handle the job. Be prepared to trade in your Ferrari for some of them, though... or at least a well-appointed Volvo.

Dan - Owner

http://www.Hi-TecDesigns.com