Support has been added for the MCP443x Microchip Digipot family. These are extremely useful digital potentiometers that are already used on Pygmy Nebula Shields. Adding a digipot to your project just became a breeze. The mcp443x source eliminates the difficulties of command and address composition and streamlines the entire communication process to a few simple function calls like digipotSetWiper() and digipotGetWiper(). The device and necessary I2C port are automatically initialized to simplify the process even further.