Hello all
Is it possible to check programmatically whether usbser.sys does still poll a specific COM port where a USB device using CDC (Communication Device Class) is connected? If yes any idea how to do that?
By the way the question is to make some test code to verify whether there is a usbser.sys problem like described e.g. at
http://www.microchip.com/forums/m538194.aspx. In short what you can read there: If the pc communicates with a USB device and the communication fails (caused e.g. noisy signals, to long or bad quality usb cable) three times, then Microsoft’s driver usbser.sys stops working/polling. Usually you can reactivate the interface by unplug/plug the respective device.
Especally to recognize this situation visualized here:
http://www.microchip.com/forums/download.axd?file=0;538194[
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N.B. This question is a 'successor' from a previous q from side:
USB Device simulation c#, c++[
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Many thanks in advance.
Regard]
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