Soldato
- Joined
- 18 Oct 2002
- Posts
- 6,672
We use a lot of USB devices at work on our equipment, namely USB-4 way RS232 adapters and a special Devasys board (which I don't know much about as it's not my area - it's an I^2C board).
Anyway, we are having more problems than we would like where the PC just doesn't talk to this Devasys board properly. The connection is this:
PC -> USB lead (often LONG, like 3m) -> USB B type female connector on device -> 2-way unpowered USB hub inside device -> 30cm USB lead to Devasys board.
Now this is a pretty convoluted connection setup - could it impact the signal quality and cause the device to not work properly? It appears in Device Manager OK and drivers are OK, but I cannot get it to communicate properly at all.
In the past, we've had garbled data coming back (jumbled alphanumeric characters for example, when we would expect clear strings like words or numbers), and sometimes we can't connect to it at all.
Sometimes swapping the main long USB cable to another one helps, sometimes not.
Anyone experienced with USB devices in this way?
Anyway, we are having more problems than we would like where the PC just doesn't talk to this Devasys board properly. The connection is this:
PC -> USB lead (often LONG, like 3m) -> USB B type female connector on device -> 2-way unpowered USB hub inside device -> 30cm USB lead to Devasys board.
Now this is a pretty convoluted connection setup - could it impact the signal quality and cause the device to not work properly? It appears in Device Manager OK and drivers are OK, but I cannot get it to communicate properly at all.
In the past, we've had garbled data coming back (jumbled alphanumeric characters for example, when we would expect clear strings like words or numbers), and sometimes we can't connect to it at all.
Sometimes swapping the main long USB cable to another one helps, sometimes not.
Anyone experienced with USB devices in this way?