Author Topic: external hub driver lockup problem  (Read 13300 times)

jslavic

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external hub driver lockup problem
« on: August 16, 2012, 01:39:33 pm »
 ???  I'm using various devices, all of which use the FTDI chip.  I'm using two different methods to talk to these devices.  The first method is talking to the virtual com port.  The second method is calling the dll directly.  Both methods work when the devices are connected directly to a PC.  When the devices are connected to a hub (Dell monitor, other various self-powered hubs) calling the dll works correctly, it seems to lock the driver up and I can no longer talk to the VCP although I can still continue to call the dll.  This seems to only happen on Win7.  Ideas?  I've got various devices, some connected directly, others connected through a hub that need to communicate both ways.  Need help! ???

Jan Axelson

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Re: external hub driver lockup problem
« Reply #1 on: August 16, 2012, 02:30:41 pm »
What exactly do you mean by "I can no longer talk to the VCP"? Port disappears? Read and/or writes fail (what is the error message)? Timeouts? Post the code that causes the failure.