Abstraction for I/O expander PCA9539

Abstraction for I/O expander PCA9539.

This crate offers the following features: * Individual pin instances, fully implementing digital::v2 traits of embeddedhal * Central I/O control, s. PCA9539 module * Two state management modes for reduced I2C overhead, s. pins module * Three concurrency models, s. concurrency section * nostd support

Example

```rust use rca9539::example::DummyI2CBus; use rca9539::expander::Bank::Bank0; use rca9539::expander::PCA9539; use rca9539::expander::PinID::Pin1; use embedded_hal::digital::v2::InputPin;

let i2cbus = DummyI2CBus::new(); let mut expander = PCA9539::new(i2cbus); let pins = expander.pins();

let pin01 = pins.getpin(Bank0, Pin1); assert!(pin01.ishigh().unwrap()); ```

Development

Any form of support is greatly appreciated. Feel free to create issues and PRs. See DEVELOPMENT for more details.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT) at your option.

Each contributor agrees that his/her contribution covers both licenses.