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K20 USB low-level communication

Question asked by steve almquist on Dec 16, 2013
Latest reply on Dec 1, 2014 by Bob Paddock

Greetings All,


I am working on a project with the MK20DX256VLL7 processor.  I have been able to successfully run the FSL_USB_Stack on our custom board using the CDC device (many thanks to Erich Styger ).  I also have been able to communicate with a host PC using a virtual comm port. 


However, I need to design this project so that several devices can be connected to a host PC at the same time, and I'd like the user to not have to worry about the specifics of comm ports and the way that Windows auto-increments the number with each new device.  Is the CDC device appropriate for this task, and if so, what driver do I need to call in the .INF file?  Is there perhaps a better device class to use?  We are starting to look at an FTDI chip and driver set, but that seems a little silly considering the K20 already has USB capabilities.