based his project on The V-USB library and created a new HID descriptor to transfer data between a micro and a computer. Then he had an idea: if the goal is only to transfer data back and forth between a computer and a microcontroller, why not write an HID-class USB serial port?
looked at the options for adding a USB serial port and didn’t like what he saw seemingly, this was an impossible task without a second, more capable microcontroller. Both LUFA and V-USB add some USB functionality to just about every AVR micro, but if you’d like a native serial port, your only options are to look towards the USB-compatible Atmel micros. If you’re using an AVR microcontroller and you’d like to add USB to a project, there are a lot of options out there for you.
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