lps25hb 0.1.0

A platform agnostic driver to interface with LPS25HB pressure sensor module.
Documentation 
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//! I2C Interface
use super::Interface;
use embedded_hal::blocking::i2c::{Write, WriteRead};

/// Multibyte bit. When 0, does not increment the address; when 1, increments the address in multiple reads. (Refer to page 25)
/// Must be OR'ed with the register address to enable multibyte data reading (temperature/pressure)
const MULTIBYTE: u8 = 0b1000_0000;

/// Errors in this crate
#[derive(Debug)]
pub enum Error<CommE> {
    /// Communication error
    Comm(CommE),
}

/// Pressure sensor address for I2C communication
#[allow(non_camel_case_types)]
pub enum I2cAddress {    
    /// SA0 pad tied to VCC
    SA0_VCC =   0b1011101,
    /// SA0 pad tied to ground
    SA0_GND =   0b1011100,   
}

impl I2cAddress {
    pub fn addr(self) -> u8 {
        self as u8
    }
}

/// This holds `I2C` and device address
pub struct I2cInterface<I2C> {
    i2c: I2C,
    dev_addr: u8,    
}

impl<I2C> I2cInterface<I2C> {
    /// Initializes an Interface with `I2C` instance and device address
    /// # Arguments
    /// * `i2c` - I2C instance
    /// * `dev_addr` - `I2cAddress`: register address for the pressure sensor
    pub fn init(i2c: I2C, dev_addr: I2cAddress) -> Self {
        Self {
            i2c,
            dev_addr: dev_addr.addr(),            
        }
    }
}

/// Implementation of `Interface`
impl<I2C, CommE> Interface for I2cInterface<I2C>
where
    I2C: WriteRead<Error = CommE> + Write<Error = CommE>,
{
    type Error = Error<CommE>;

    fn write(&mut self, addr: u8, value: u8) -> Result<(), Self::Error> {
        //let sensor_addr = self.dev_addr;         
        core::prelude::v1::Ok(
            self.i2c
                //.write(sensor_addr, &[addr, value])
                .write(self.dev_addr, &[addr, value])
                .map_err(Error::Comm)?,
        )
    }

    fn read(&mut self, addr: u8, buffer: &mut [u8]) -> Result<(), Self::Error> {
        //let sensor_addr = self.dev_addr;        
        core::prelude::v1::Ok(
            self.i2c
                //.write_read(sensor_addr, &[addr], buffer)
                .write_read(self.dev_addr, &[addr], buffer)
                .map_err(Error::Comm)?,
        )
    }
}