mma7660fc 0.1.2

A platform agnostic driver to interface with the MMA7660FC 3-Axis Accelerometer via I2C
Documentation 
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#![deny(warnings)]
#![feature(unsize)]
#![no_std]

extern crate embedded_hal as hal;
extern crate cast;

use hal::blocking::i2c::{Write, WriteRead};
use core::mem;

pub const ADDRESS: u8 = 0x4c;

#[allow(dead_code)]
#[derive(Copy, Clone)]
pub enum  Register {
    XOUT = 0x00,
    YOUT = 0x01,
    ZOUT = 0x02,
    TILT = 0x03,
    SRST = 0x04,
    SPCNT = 0x05,
    INTSU = 0x06,
    MODE = 0x07,
    SR = 0x08,
    PDET = 0x09,
    PD = 0x0A
}


impl Register {
    /// Get register address.
    fn addr(&self) -> u8 {
        *self as u8
    }
}

/// XYZ triple
#[derive(Debug)]
pub struct I8x3 {
    /// X component
    pub x: i8,
    /// Y component
    pub y: i8,
    /// Z component
    pub z: i8,
}


#[allow(dead_code)]
#[derive(Copy, Clone)]
pub enum Mode {
    STANDBY = 0x00,
    ACTIVE =0x01
}

impl Mode {
    /// Get bits
    fn bits(&self) -> u8 {
        *self as u8
    }
}



/// MMA7660FC Driver
pub struct Mma7660fc<I2C> {
    pub i2c: I2C
}

impl <I2C, E> Mma7660fc <I2C>
where I2C : WriteRead<Error = E> + Write<Error = E>,

{
    /// Creates a new driver from a I2C peripheral
    pub fn new(i2c: I2C) -> Result<Self, E> {
        let mut mma7660fc = Mma7660fc { i2c };

        
        mma7660fc.write_register(Register::MODE,Mode::ACTIVE.bits())?;


        Ok(mma7660fc)

    }

    /// write to register
    pub fn write_register(&mut self,reg:Register,data:u8)->Result<(), E>{
        self.i2c.write(ADDRESS,&[reg.addr(),data])
    }

    /// set mode

    pub fn set_mode(&mut self, mode:Mode) -> Result<(), E>{
        self.write_register(Register::MODE,mode.bits())
    }

    /// get x
    pub fn get_x(&mut self) -> Result<i8,E>{
        let mut buffer: [u8; 1] = unsafe { mem::uninitialized() };

        self.i2c.write_read(ADDRESS,&[Register::XOUT.addr()],& mut buffer)?


        Ok(result as i8)


    }

    /// get xyz
    pub fn get_xyz(&mut self) -> Result<I8x3,E>{
        let mut buffer: [u8; 3] = unsafe { mem::uninitialized() };

        self.i2c.write_read(ADDRESS,&[Register::XOUT.addr()],& mut buffer)?;

        Ok(I8x3 {
            x: (buffer[0]) as i8,
            y: (buffer[1]) as i8,
            z: (buffer[2]) as i8,

        })


    }




}