63 lines
1.8 KiB
Markdown
63 lines
1.8 KiB
Markdown
# `mcp23017`
|
|
|
|
> no_std driver for [MCP23017](http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf) (16-Bit I2C I/O Expander with Serial Interface module)
|
|
|
|
[](https://github.com/circuitry-maker/mcp23017/actions?query=workflow%3Amcp23017-ci)
|
|
[](https://crates.io/crates/mcp23017)
|
|
[](https://docs.rs/mcp23017)
|
|
|
|
## Basic usage
|
|
|
|
Include this [library](https://crates.io/crates/mcp23017) as a dependency in your `Cargo.toml`:
|
|
|
|
```rust
|
|
[dependencies.mcp23017]
|
|
version = "<version>"
|
|
```
|
|
Use [embedded-hal](https://github.com/rust-embedded/embedded-hal) implementation to get I2C handle and then create mcp23017 handle:
|
|
|
|
```rust
|
|
extern crate mcp23017;
|
|
|
|
match mcp23017::MCP23017::default(i2c) {
|
|
Ok(mut u) => {
|
|
u.init_hardware();
|
|
u.pin_mode(1, mcp23017::PinMode::OUTPUT); // for the first pin
|
|
u.all_pin_mode(mcp23017::PinMode::OUTPUT); // or for all pins
|
|
|
|
let status = u.read_gpioab().unwrap();
|
|
println!("all {:#?}", status).unwrap();
|
|
|
|
let read_a = u.read_gpio(mcp23017::Port::GPIOA).unwrap();
|
|
println!("port a {:#?}", read_a).unwrap();
|
|
|
|
match u.write_gpioab(65503){
|
|
Ok(_) => {
|
|
println!("ok").unwrap();
|
|
}
|
|
_ => {
|
|
println!("something wrong").unwrap();
|
|
}
|
|
}
|
|
}
|
|
Err(mcp23017::MCP23017::Error::BusError(error)) => {
|
|
println!("{:#?}", error).unwrap();;
|
|
panic!();
|
|
}
|
|
_ => {
|
|
panic!();
|
|
}
|
|
};
|
|
```
|
|
|
|
### Hardware address pins
|
|
|
|
|
|
## Documentation
|
|
|
|
API Docs available on [docs.rs](https://docs.rs/mcp23017/0.1.0/mcp23017/)
|
|
|
|
## License
|
|
|
|
[MIT license](http://opensource.org/licenses/MIT)
|