I have a custom circuit board that plugs into a USB port and provides 10 Com Ports (RS232).? I am having intermittent problems where some of the com ports become non-responsive.?
I have a custom Windows XP application written in VB6? that opens all 10 com ports and receives and sends data to the respective com ports.? There are intermittent problems where some com ports become non responsive to my application.? Closing and re-opening the application will re-establish the com port.
I believe I have a hardware problem where the USB to Serial Chip resets intermittently.? When the chip resets, Windows "loses" the address that it previously had for that com port, and only by closing the problem port and then re-opening the port will the com port work again.?
I'm looking for a software solution where we "lock" the com port addressing so that if the USB to Serial chip resets, it will have the same windows address so that my application will continue to work even if the usb to serial chip resets.
Is this possible?
The attached file has screen shots of the Windows Device manager.