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STM32 F2 series VCP issue

Question asked by on Feb 9, 2015
Latest reply on Feb 10, 2015 by
Dear all sir:
     I'm working on STM32_USB-HOST-Device-LibV2.1.0 USB_Device_Examples VCP. This demo code try to send  & receive serial data from PC through USB cable and transfer to serial port.
     Now the I down load the VCP driver for PC and I can see the STMicroelectronics virtual CON Port (COM11) in device management under Win7. 
     However, when I try to use terminal open this port, it's show unable to open connection to COM11, unable to open serial port.
     Should I modify the demo code? But I'm confused where should I work on. Please allow me ask help for this issue, many thanks.