This is an Virtual COM example that demonstrates Communication Device Class (CDC)
on USB Device.

It demonstrates a bridge between PC USB Virtual COM Port and UART port on the 
evaluation board and is based on a Windows USB host driver (usbser.sys).

Detailed description is available on:
www.keil.com/pack/doc/MW/USB/html/dev_cdc_tutorial.html

Board:                  Atmel 'SAME70 Xplained'
Microcontroller:        Atmel 'ATSAME70Q21'

The PC will install a Virtual COM Port on the PC (see Driver Installation).
After installation an additional port "SAMV7-XPRO USB USB VCOM Port(COMx)"
can be found under System/Hardware/Device Manager/Ports(COM&LPT).
Number "x" is not fixed as different PC configuration may have different 
"x" displayed on the device manager. The USB host driver assigns "x" 
dynamically based on the existing COM port configuration of the system.

Testing the USB Virtual COM Port with serial cable:

  Open two serial terminal windows (e.g. PuTTY)
      One with "SAMV7-XPRO USB USB VCOM Port(COMx)" 
      One with "Atmel Corp. EDBG USB Port (COMy)"
  Connect and open "COMx" and "COMy".
  Data from "COMx" will be echoed on "COMy" and vice versa. 

The program is available for targets:

  SAME70 Flash DAP:        runs from Internal Flash located on chip
                          uses on-board CMSIS-DAP debugger

  SAME70 Flash ULINK Pro:  runs from Internal Flash located on chip
                          uses ULINK Pro Cortex debugger

Driver Files:
-------------
    - samv7-xpro-vcom.inf  : Driver setup information.
    - samv7-xpro-vcom.cat  : Digitally signed driver catalog file for Host PCs.

Note : Digitally signing of the driver catalog file is required to install
drivers on 64-bit PCs using Windows Vista or later Windows versions. Please
refer to Microsoft documentation for further information.

Driver Installation:
--------------------
     "Welcome to the Found New Hardware Wizard" appears
     - select 'No, not this time'
     - press  'Next'

     - select 'Install from a list or specific location (Advanced)'
     - press  'Next'

     - select 'Search for the best driver in these locations'
     - check  'include this location in the search'
     - set to <project folder>
     - press 'Next'

     "Hardware Installation" appears
     "has not passed Windows Logo testing..."
     - press 'Continue Anyway'

     "Completing the Found New Hardware Wizard" appears
     - press 'Finish'
