Hi, All:

First, I should say sorry about this, This question is not really related with 51 Chip...

I am using uPSD3234A chip on a small board, The USB bus is connected to ISP1160 Host Controller. I don't have any USB debugger installed between Host controller and uPSD3234A, I only have a scope in hand.

The question is
What is the best way to debug the USB communication? I try to dump out some data through debug port ( I use uart 0 as debug port). This method is OK,but not the best.

Any idea from your guys have experience with USB?

Thanks. Have a great weekend.

Frank