You might want to look into Teensy (or Teensyduino) for this. Some of the serial control signals are implemented in their version of the USB CDC driver, and Teensy uses the same ATMega32u4 chip as the Leonardo.
You might want to look into Teensy (or Teensyduino) for this. Some of the serial control signals are implemented in their version of the USB CDC driver, and Teensy uses the same ATMega32u4 chip as the Leonardo.