# hd44780-hal
[](https://crates.io/crates/hd44780-hal)
[](https://crates.io/crates/hd44780-hal)
[](https://crates.io/crates/hd44780-hal)
Implementation of the `embedded-hal` traits for the HD44780.
### Documentation
https://docs.rs/hd44780-hal
### Examples
Currently there are basic examples for **Raspberry Pi** as well as the **Adafruit Metro Express M0** as those are the devices I currently have on hand.
Any platform that implements the [embedded-hal](https://github.com/rust-embedded/embedded-hal) traits is supported by this library! :thumbsup:
### Example usage
This library is pretty bare bones at the moment, but it's greatest feature is that all you need to do to use it is supply the `HD44780::new` function a bunch of pins that implement the `OutputPin` trait for [embedded-hal](https://github.com/rust-embedded/embedded-hal) as well as a struct that implements delay with support for `DelayUs<u16> + DelayMs<u8>` also from [embedded-hal](https://github.com/rust-embedded/embedded-hal).
```rust
// Code grabbed from the metro_m0 example
let mut lcd = HD44780::new(
pins.d4.into_open_drain_output(&mut pins.port), // Register Select pin
pins.d3.into_open_drain_output(&mut pins.port), // Enable pin
pins.d5.into_open_drain_output(&mut pins.port), // d0
pins.d6.into_open_drain_output(&mut pins.port), // d1
pins.d7.into_open_drain_output(&mut pins.port), // d2
pins.d8.into_open_drain_output(&mut pins.port), // d3
pins.d9.into_open_drain_output(&mut pins.port), // d4
pins.d10.into_open_drain_output(&mut pins.port), // d5
pins.d11.into_open_drain_output(&mut pins.port), // d6
pins.d12.into_open_drain_output(&mut pins.port), // d7
delay,
);
lcd.reset();
lcd.clear();
lcd.set_display_mode(true, true, true);
lcd.write_str("Hello, world!");
```
### Features
- 4-bit & 8-bit modes are supported
### Todo
- Busy flag support (Waiting for support from embedded-hal to read and write from a pin)
- Non-blocking API
- A more user-friendly API with additional features
- Custom characters
Additional issues as well as pull-requests are welcome!
### License
This project is licensed under MIT license ([LICENSE](https://github.com/kunerd/clerk/blob/master/docs/CONTRIBUTING.md) or <https://opensource.org/licenses/MIT>)
