hdc20xx 0.1.0

# Rust HDC2080, HDC2021 and HDC2010 Low-Power Humidity and Temperature Digital Sensor Driver

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This is a platform agnostic Rust driver for the HDC2080, HDC2021 and HDC2010
low-power humidity and temperature digital sensor using the [`embedded-hal`]
traits.

This driver allows you to:
- Set the measurement mode. Temperature only or temperature and humidity. See: `set_measurement_mode()`.
- Make one shot measurement. See: `read()`.
- Read the data and interrupt status. See: `status()`.
- Trigger a software reset. See: `software_reset()`.
- Read the manufacturer ID. See: `manufacturer_id()`.
- Read the device ID. See: `device_id()`.

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[Introductory blog post]()
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## The devices

The HDC2080 device is an integrated humidity and temperature sensor that
provides high accuracy measurements with very low power consumption in a
small DFN package. The capacitive-based sensor includes new integrated
digital features and a heating element to dissipate condensation and moisture.

The HDC2080 digital features include programmable interrupt thresholds to
provide alerts and system wake-ups without requiring a microcontroller to
be continuously monitoring the system. Combined with programmable sampling
intervals, a low power consumption, and a support for a 1.8-V supply voltage,
the HDC2080 is designed for battery-operated systems.

This driver is compatible with HDC2080, HDC2021 and HDC2010.

Datasheets: [HDC2080](https://www.ti.com/lit/ds/symlink/hdc2080.pdf), [HDC2021](https://www.ti.com/lit/ds/symlink/hdc2021.pdf), [HDC2010](https://www.ti.com/lit/ds/symlink/hdc2010.pdf)

## Usage

To use this driver, import this crate and an `embedded_hal` implementation,
then instantiate the device.

Please find additional examples using hardware in this repository: [driver-examples]

[driver-examples]: https://github.com/eldruin/driver-examples

```rust
extern crate linux_embedded_hal as hal;
use hdc20xx::{Hdc20xx, SlaveAddr};
use nb::block;

fn main() {
    let dev = hal::I2cdev::new("/dev/i2c-1").unwrap();
    let address = SlaveAddr::default();
    let mut sensor = Hdc20xx::new(dev, address);
    loop {
        let data = block!(sensor.read()).unwrap();
        println!(
            "Temperature: {:2}°C, Humidity: {:2}%",
            data.temperature,
            data.humidity.unwrap()
        );
    }
}
```

## Support

For questions, issues, feature requests, and other changes, please file an
[issue in the github project](https://github.com/eldruin/hdc20xx-rs/issues).

## License

Licensed under either of

 * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
   http://www.apache.org/licenses/LICENSE-2.0)
 * MIT license ([LICENSE-MIT](LICENSE-MIT) or
   http://opensource.org/licenses/MIT)

at your option.

### Contributing

Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.

[`embedded-hal`]: https://github.com/rust-embedded/embedded-hal