#!/usr/bin/env node

/*
 * Author: Brendan Le Foll <brendan.le.foll@intel.com>
 * Copyright (c) 2014 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

"use strict";

const mraa = require('mraa'); //require mraa

let i2cDevice = new mraa.I2c(0);
i2cDevice.address(0x77);

// initialise device
if (i2cDevice.readReg(0xd0) != 0x55) {
    console.log("error");
}

// we want to read temperature so write 0x2e into control reg
i2cDevice.writeReg(0xf4, 0x2e);

// read a 16bit reg, obviously it's uncalibrated so mostly a useless value :)
console.log(i2cDevice.readWordReg(0xf6));

// and we can do the same thing with the read()/write() calls if we wished
// thought I'd really not recommend it!
let buf = new Buffer(2);
buf[0] = 0xf4;
buf[1] = 0x2e;
console.log(buf.toString('hex'));
i2cDevice.write(buf);

i2cDevice.writeByte(0xf6);
let result = i2cDevice.read(2);
console.log(result.toString('hex'));