i2c-reg

Create registers for reading and writing with I2C interface.

Documentation

Features

Effortless creation of I2C read only/write only/read write registers with various sizes.

#[derive(Register, I2cReadRegister, I2cWriteRegister)]
#[address = 0b1110]
#[size = 2]
struct TemperatureRegister;

Typesafe conversion between raw bytes and actual values when reading from/writing to registers via interface.

type Raw = <TemperatureRegister as Register>::Raw;

struct Temperature(u16);

impl Into<Raw> for Temperature {
    fn into(self) -> Raw {
        self.0.to_be_bytes()
    }
}

impl From<Raw> for Temperature {
    fn from(raw: Raw) -> Self {
        Temperature(u16::from_be_bytes(raw))
    }
}

let mut interface = I2cInterface { i2c, address: 0b0110 };
interface.write_register(TemperatureRegister, Temperature(42)).unwrap();
let temperature: Temperature = interface.read_register(TemperatureRegister).unwrap();
assert_eq!(Temperature(42), temperature);

Examples

• Temperature sensor driver - MCP9808

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.

Contribution

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.

lib.rs:

Macros for register traits