Reference for unit 'mcp23017'

Plain MCP23017 and MCP23S17 access

`uses`
`Classes,`
`SysUtils,`
`fpspi,`		Free Pascal SPI abstraction layer
`fpi2c;`		Free Pascal I2C abstraction layer

Overview

This unit provides classes for plain access of MCP23017 and MCP23S17 (and compatible chips).