Coduino

The Coduino will be an Arduino-compatible CPU/support on a shield, to enable multiprocessor stacks. It may also be made in multi-CPU version (2 or 4 CPUs on a shield) for really cool projects.

• Will use ATMega328p for compatibility with the Duemilanove board.
• Standard bootloader will be used.
• Serial only in the first revision, no USB-Serial on the board itself (FTDI cables are easy to get now).
• Will communicate with the master Arduino (bottom of the stack) via I2C, leaving all other pins available.
• Main headers will just 'stack-through' the master Arduino, the I/O from the Coduino will be broken out on separate headers (maybe with a 'base board' that can connect to stack shields on the Coduino via a cable?).