Overview

Driver for a Microchip MCP23016 16-bit I2C bus expander..

The MCP23016 is a 16-bit port expander where each of the bits can function as either an input or an output.

Resources

All correct at time of writing, but as always, manufacturers love to move things around on their website.

Web page

http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010412

Datasheet

http://www.microchip.com/downloads/en/DeviceDoc/20090C.pdf

Test hardware

This code has been tested using a SolderCore controlling a SenseCore.

http://www.soldercore.com/

API Summary

Constants
MCP23016_I2C_ADDR	8-bit I2C address for MC23016
Functions
mcp23016_initialize_i2c	Initialize bus expander on I2C bus