AnsweredAssumed Answered

COM over USB sending unexpected packages

Question asked by bgl on Jun 28, 2011
Latest reply on Jul 8, 2011 by rosarium
Hello everybody,

I'm using STM32F103ZEH6. The device is connected to a host pc via USB emulating a virtual COM port.
From time to time I can detect 2 similar packages with my USB-Sniffer an the host pc recognizes them, too. But I do send this package only once!
Does anybody have an idea why this is happening?
It seems not to be a problem with USB protocol. The USB-Sniffer does not detect any errors.

Thanks for your help!