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Serial comm problem I/O blocking

Hi
I've a problem with I/O blocking on my serial port at this particular
scenario...
1.I've developed a driver to communicate with some device using Serial
Comm (overlapped I/O).
2.I'm able to send and receive messages perfectly.
3.As part of integration few more drivers also exist inorder to
communicate with different devices.
4.I'm getting I/O blocking and application hangs up for my driver,
when a particular driver is invoked before my driver.
5.From that point application hangs up after receiving some messages,
whenever my driver is invoked.
6. To come out of this problem I had to unregister the other driver and
restart the system.
7. That driver opens port in a normal fashion(non-overlaped I/O).
8.What could be the reasons for this unusual blocking and can you plz
give any sujjections to fix it.

Thanks & Regards
Sai

Jul 31 '06 #1
0 1278

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