adafruit.com has published a new tutorial for their Atmega32u4 breakout board. It discuss on how to use it with AVRdude and how to setup and use it with Arduino IDE.
We like the AVR 8-bit family and were excited to see Atmel upgrade the series with a USB core. Having USB built in allows the chip to act like any USB device. For example, we can program the chip to ‘pretend’ it’s a USB joystick, or a keyboard, or a flash drive! Another nice bonus of having USB built in is that instead of having an FTDI chip or cable (like an Arduino), we can emulate the serial port directly in the chip. This costs some Flash space and RAM space but that’s the trade-off.
Atmega32u4 Breakout Board Tutorial – [Link]