README.md

MCP23017 RPI Library

This library provides an interface for the MCP23017 gpio expander chip. It is based on a python library of the same name, found here.

You can view the docs here.

Example - Blink

let mut mcp = MCP23017::new(0x20, 1).unwrap();
let led = Pin::new(0).unwrap();
mcp.pin_mode(&led, Mode::Output).unwrap();

loop {
    mcp.output(&led, State::High).unwrap();
    sleep(Duration::from_millis(200));
    mcp.output(&led, State::Low).unwrap();
    sleep(Duration::from_millis(200));
}  

Pin Conversion

PIN	MCP PIN	Name
0	21	GPA0
1	22	GPA1
2	23	GPA2
3	24	GPA3
4	25	GPA4
5	26	GPA5
6	27	GPA6
7	28	GPA7
8	1	GPB0
9	2	GPB1
10	3	GPB2
11	4	GPB3
12	5	GPB4
13	6	GPB5
14	7	GPB6
15	8	GPB7

License

This software is provided under the MIT license. Click here to view. The original python library is also licensed under MIT. It can be found here.