We have a strange problem where initialising a PCI-based scientific
digital camera is causing writes to a USB serial adapter (Keyspan) to
hang our software. We are slightly stuck in the middle of this (not
having access to the driver source code of either the PCI card or USB
device), but my suspicion is that the PCI driver is causing a USB
reset, which is in turn getting the Keyspan adapter into a strange
state behind the back of the Keyspan driver.
Does anyone know if a PCI device driver could cause a USB device to
stop working in this way? I guess that the USB controller is a
device on the PCI bus, but is there any way in which a PCI driver
could affect devices other than the ones they are supposed to be
controlling?
Cheers,
Steve.
Stephen Baxter
Software Development Manager
Improvision
email@hidden
+44-2476-692229
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