satakagi/i2c-BMP180.js

## i2c-bmp180.html
<!doctype html>
<html>

<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1">
  <title>i2c-BMP180</title>
  <script src="../../../polyfill/polyfill.js"></script>
  <script src="../../drivers/i2c-BMP180.js"></script>
  <script src="./mainBmp.js"></script>
  <style>
    table,p {
      color: blue;
      text-align: center;
      font-size: 24px;
    }

    img {
      position: absolute;
      top: 50px;
      right: 0px;
      display: block;
      margin-left: auto;
      margin-right: auto;
    }
  </style>
</head>

<body>
  <p id="head">BMP-180</p>
  <img src="schematic.png" width="400"/>
  <table>
  <tr><td>temperature</td><td id="temp"></td></tr>
  <tr><td>pressure</td><td id="pres"></td></tr>
  </table>
</body>

</html>

## i2c-BMP180.js
// BMP180 driver for CHIRIMEN WebI2C
// ported from hhttps://qiita.com/uchino-tama/items/efccfe871ab3abc782f3
// by Satoru Takagi

var BMP180 = function(i2cPort,slaveAddress){
	this.AC = [];
	this.B = [];
	this.M = [];
	this.t_fine = 0;
	this.i2cPort = i2cPort;
	this.i2cSlave = null;
	if (slaveAddress){
		this.slaveAddress = slaveAddress;
	} else {
		this.slaveAddress = 0x77;
	}
	console.log("this.slaveAddress:",this.slaveAddress);
};

BMP180.prototype = {
	init: async function(){
		this.i2cSlave = await this.i2cPort.open(this.slaveAddress);
		console.log("init ok:"+this.i2cSlave);
		await this.getCalibParam();
	},
	getSVal: function(val){
		if ( val & 0x8000 ){
			return (( -val ^ 0xFFFF) + 1);
		} else {
			return ( val );
		}
	},
	getCalibParam: async function(){
		var calib = [];
		var dat;
		var getSVal = this.getSVal;
		console.log("getCalibParam");
		for ( var ra = 0xAA ; ra <= 0xAA+21 ; ra++ ){
			dat = await this.i2cSlave.read8(ra);
			calib.push(dat);
		}
		var AC = this.AC;
		var B = this.B;
		var M = this.M;
		AC.push(getSVal((calib[0] << 8) | calib[1])); // AC1 AC[0]
		AC.push(getSVal((calib[2] << 8) | calib[3])); // AC2
		AC.push(getSVal((calib[4] << 8) | calib[5])); // AC3
		AC.push((calib[6] << 8) | calib[7]); // uint AC4
		AC.push((calib[8] << 8) | calib[9]); // uint AC5
		AC.push((calib[10] << 8) | calib[11]); // uint AC6
		B.push(getSVal((calib[12] << 8) | calib[13])); // B1 B[0]
		B.push(getSVal((calib[14] << 8) | calib[15])); // B2
		M.push(getSVal((calib[16] << 8) | calib[17])); // MB M[0]
		M.push(getSVal((calib[18] << 8) | calib[19])); // MC
		M.push(getSVal((calib[20] << 8) | calib[21])); // MD
		console.log(AC,B,M);
	},
	readAndCalcB5: async function(){
		var AC = this.AC;
		var B = this.B;
		var M = this.M;

		await this.i2cSlave.write8(0xF4,0x2E); // read temp.
		var dat0 =  await this.i2cSlave.read8(0xF6);
		var dat1 =  await this.i2cSlave.read8(0xF7);
		var UT = ((dat0 << 8) | dat1);
		var X1 = ((UT - AC[5]) * AC[4]) >> 15;
		var X2 = (M[1] << 11) / (X1 + M[2]);
		var B5 = X1 + X2;
		return ( B5);

	},
	readTemperature : async function(){
		var b5 = await this.readAndCalcB5();
		return ((b5 + 8) >> 4) / 10.0;
	},
	readPressure : async function(){
		var AC = this.AC;
		var B = this.B;
		var M = this.M;
		var getSVal = this.getSVal;
		var mode = 1; // standard mode      0:ULPW,1:STD,2:HIRES,3:UHIRES
		await this.i2cSlave.write8(0xF4,(0x34 + (mode << 6))); // read pressure standard mode

		await this.sleep(5+3*mode*mode);


		var data  = [];
		var dat;
		for ( var ra = 0xF6 ; ra <= 0xF6+2 ; ra++ ){
			dat = await this.i2cSlave.read8(ra);
			data.push(dat);
		}
		console.log("data:",data);
		var UP = (( (data[0]<<16 ) | (data[1] << 8 ) | data[2]) >> (8 - mode) ) ;

		// Calibration for Pressure
		var B6 = await this.readAndCalcB5() - 4000;
		var X1 = (B[1] * (B6 * B6) >> 12) >> 11;
		var X2 = (AC[1] * B6) >> 11;
		var X3 = X1 + X2;
		var B3 = (((AC[0] * 4 + X3) << mode) + 2) / 4;

		X1 = (AC[2] * B6) >> 13;
		X2 = (B[0] * ((B6 * B6) >> 12)) >> 16;
		X3 = ((X1 + X2) + 2) >> 2;
		var B4 = (AC[3] * (X3 + 32768)) >> 15;
		var B7 = (UP - B3) * (50000 >> mode);

		var p = B7 < 0x80000000 ? (B7 * 2) / B4 : (B7 / B4) * 2;

		X1 = (p >> 8) * (p >> 8);
		X1 = (X1 * 3038) >> 16;
		X2 = (-7357 * p) >> 16;
		p = p + ((X1 + X2 + 3791) >> 4);

		return (p / 100.0);
	},
	sleep: function (ms) {
		return new Promise(function(resolve) {
			setTimeout(resolve, ms);
		});
	}

};

## mainBmp.js
"use strict";

var head;
window.addEventListener(
	"load",
	function() {
		head = document.querySelector("#head");
		mainFunction();
	},
	false
);

async function mainFunction() {
	try {
		var i2cAccess = await navigator.requestI2CAccess();
		var port = i2cAccess.ports.get(1);
		var bmp180 = new BMP180(port, 0x77);
		await bmp180.init();
		while (1) {
			var temperature = await bmp180.readTemperature();
			temp.innerHTML=temperature;
			var pressure = await bmp180.readPressure();
			pres.innerHTML=pressure;
			await sleep(1000);
		}
	} catch (error) {
		console.error("error", error);
	}
}

function sleep(ms) {
	return new Promise(function(resolve) {
		setTimeout(resolve, ms);
	});
}
	<!doctype html>
	<html>

	<head>
	<meta charset="UTF-8" />
	<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1">
	<title>i2c-BMP180</title>
	<script src="../../../polyfill/polyfill.js"></script>
	<script src="../../drivers/i2c-BMP180.js"></script>
	<script src="./mainBmp.js"></script>
	<style>
	table,p {
	color: blue;
	text-align: center;
	font-size: 24px;
	}

	img {
	position: absolute;
	top: 50px;
	right: 0px;
	display: block;
	margin-left: auto;
	margin-right: auto;
	}
	</style>
	</head>

	<body>
	<p id="head">BMP-180</p>
	<img src="schematic.png" width="400"/>
	<table>
	<tr><td>temperature</td><td id="temp"></td></tr>
	<tr><td>pressure</td><td id="pres"></td></tr>
	</table>
	</body>

	</html>
	// BMP180 driver for CHIRIMEN WebI2C
	// ported from hhttps://qiita.com/uchino-tama/items/efccfe871ab3abc782f3
	// by Satoru Takagi

	var BMP180 = function(i2cPort,slaveAddress){
	this.AC = [];
	this.B = [];
	this.M = [];
	this.t_fine = 0;
	this.i2cPort = i2cPort;
	this.i2cSlave = null;
	if (slaveAddress){
	this.slaveAddress = slaveAddress;
	} else {
	this.slaveAddress = 0x77;
	}
	console.log("this.slaveAddress:",this.slaveAddress);
	};

	BMP180.prototype = {
	init: async function(){
	this.i2cSlave = await this.i2cPort.open(this.slaveAddress);
	console.log("init ok:"+this.i2cSlave);
	await this.getCalibParam();
	},
	getSVal: function(val){
	if ( val & 0x8000 ){
	return (( -val ^ 0xFFFF) + 1);
	} else {
	return ( val );
	}
	},
	getCalibParam: async function(){
	var calib = [];
	var dat;
	var getSVal = this.getSVal;
	console.log("getCalibParam");
	for ( var ra = 0xAA ; ra <= 0xAA+21 ; ra++ ){
	dat = await this.i2cSlave.read8(ra);
	calib.push(dat);
	}
	var AC = this.AC;
	var B = this.B;
	var M = this.M;
	AC.push(getSVal((calib[0] << 8) \| calib[1])); // AC1 AC[0]
	AC.push(getSVal((calib[2] << 8) \| calib[3])); // AC2
	AC.push(getSVal((calib[4] << 8) \| calib[5])); // AC3
	AC.push((calib[6] << 8) \| calib[7]); // uint AC4
	AC.push((calib[8] << 8) \| calib[9]); // uint AC5
	AC.push((calib[10] << 8) \| calib[11]); // uint AC6
	B.push(getSVal((calib[12] << 8) \| calib[13])); // B1 B[0]
	B.push(getSVal((calib[14] << 8) \| calib[15])); // B2
	M.push(getSVal((calib[16] << 8) \| calib[17])); // MB M[0]
	M.push(getSVal((calib[18] << 8) \| calib[19])); // MC
	M.push(getSVal((calib[20] << 8) \| calib[21])); // MD
	console.log(AC,B,M);
	},
	readAndCalcB5: async function(){
	var AC = this.AC;
	var B = this.B;
	var M = this.M;

	await this.i2cSlave.write8(0xF4,0x2E); // read temp.
	var dat0 = await this.i2cSlave.read8(0xF6);
	var dat1 = await this.i2cSlave.read8(0xF7);
	var UT = ((dat0 << 8) \| dat1);
	var X1 = ((UT - AC[5]) * AC[4]) >> 15;
	var X2 = (M[1] << 11) / (X1 + M[2]);
	var B5 = X1 + X2;
	return ( B5);

	},
	readTemperature : async function(){
	var b5 = await this.readAndCalcB5();
	return ((b5 + 8) >> 4) / 10.0;
	},
	readPressure : async function(){
	var AC = this.AC;
	var B = this.B;
	var M = this.M;
	var getSVal = this.getSVal;
	var mode = 1; // standard mode 0:ULPW,1:STD,2:HIRES,3:UHIRES
	await this.i2cSlave.write8(0xF4,(0x34 + (mode << 6))); // read pressure standard mode

	await this.sleep(5+3modemode);


	var data = [];
	var dat;
	for ( var ra = 0xF6 ; ra <= 0xF6+2 ; ra++ ){
	dat = await this.i2cSlave.read8(ra);
	data.push(dat);
	}
	console.log("data:",data);
	var UP = (( (data[0]<<16 ) \| (data[1] << 8 ) \| data[2]) >> (8 - mode) ) ;

	// Calibration for Pressure
	var B6 = await this.readAndCalcB5() - 4000;
	var X1 = (B[1] * (B6 * B6) >> 12) >> 11;
	var X2 = (AC[1] * B6) >> 11;
	var X3 = X1 + X2;
	var B3 = (((AC[0] * 4 + X3) << mode) + 2) / 4;

	X1 = (AC[2] * B6) >> 13;
	X2 = (B[0] * ((B6 * B6) >> 12)) >> 16;
	X3 = ((X1 + X2) + 2) >> 2;
	var B4 = (AC[3] * (X3 + 32768)) >> 15;
	var B7 = (UP - B3) * (50000 >> mode);

	var p = B7 < 0x80000000 ? (B7 * 2) / B4 : (B7 / B4) * 2;

	X1 = (p >> 8) * (p >> 8);
	X1 = (X1 * 3038) >> 16;
	X2 = (-7357 * p) >> 16;
	p = p + ((X1 + X2 + 3791) >> 4);

	return (p / 100.0);
	},
	sleep: function (ms) {
	return new Promise(function(resolve) {
	setTimeout(resolve, ms);
	});
	}

	};
	"use strict";

	var head;
	window.addEventListener(
	"load",
	function() {
	head = document.querySelector("#head");
	mainFunction();
	},
	false
	);

	async function mainFunction() {
	try {
	var i2cAccess = await navigator.requestI2CAccess();
	var port = i2cAccess.ports.get(1);
	var bmp180 = new BMP180(port, 0x77);
	await bmp180.init();
	while (1) {
	var temperature = await bmp180.readTemperature();
	temp.innerHTML=temperature;
	var pressure = await bmp180.readPressure();
	pres.innerHTML=pressure;
	await sleep(1000);
	}
	} catch (error) {
	console.error("error", error);
	}
	}

	function sleep(ms) {
	return new Promise(function(resolve) {
	setTimeout(resolve, ms);
	});
	}