Andy Kim: ESP로 오실로스코프를 만들자 - #4 (최소 크기 및 비용편)

이 소스코드는 [ 최소 비용의 오실로스코프 만들기 ] 에 포함된 소스코드이다. 상세 내용은 링크를 참조하자.

4. ./data/web_interface.html

<!DOCTYPE html>

<head>

<title>Web Oscilloscope Ver 0.9</title>

<style>

html,

body {

width: 100%;

height: 100%;

margin: 0px;

border: 0;

overflow: hidden;

/* Disable scrollbars */

display: block;

/* No floating content on sides */

}

</style>

// ------------------------------------------------------

// Tiny + Cheap Oscilloscope

// [[ AP MODE Info]] SSID : OSCIL_V06, PWD : 12345678

// +-------- GPL License --------------------------------+

// do not remove contact & url

// contact : terminal0070@gmail.com

// blog : https://andy-power.blogspot.com/

// ------------------------------------------------------

//-------------------------------------------------------------------

// for rounded rectangular

// x, y, width, height, radius of each conner, fill?, stroke?

//-------------------------------------------------------------------

CanvasRenderingContext2D.prototype.roundRect = function (x, y, width, height, radius, fill, stroke) {

var cornerRadius = { upperLeft: 0, upperRight: 0, lowerLeft: 0, lowerRight: 0 };

if (typeof stroke == "undefined") { stroke = true; }

if (typeof radius == "object") {

for (var side in radius) {

cornerRadius[side] = radius[side];

}

this.beginPath();

this.moveTo(x + cornerRadius.upperLeft, y);

this.lineTo(x + width - cornerRadius.upperRight, y);

this.quadraticCurveTo(x + width, y, x + width, y + cornerRadius.upperRight);

this.lineTo(x + width, y + height - cornerRadius.lowerRight);

this.quadraticCurveTo(x + width, y + height, x + width - cornerRadius.lowerRight, y + height);

this.lineTo(x + cornerRadius.lowerLeft, y + height);

this.quadraticCurveTo(x, y + height, x, y + height - cornerRadius.lowerLeft);

this.lineTo(x, y + cornerRadius.upperLeft);

this.quadraticCurveTo(x, y, x + cornerRadius.upperLeft, y);

this.closePath();

if (stroke) { this.stroke(); }

if (fill) { this.fill(); }

}

//-------------------------------------------------------------------

// for websocket

//-------------------------------------------------------------------

var g_WebSocket = null; // web socket

var g_bForceCloseWebsocket = false;

function startSocket() {

g_strConntectionStatus = "Try con..."

redraw();

if ("WebSocket" in window) {

g_WebSocket = new WebSocket("ws://192.168.4.1:8080"); // home

g_WebSocket.binaryType = 'arraybuffer';

g_WebSocket.onopen = function (event) {

g_strConntectionStatus = "Connected";

redraw();

}

g_WebSocket.onmessage = function (event) {

var wsRecvMsg = event.data;

var dataStream = new Uint8Array(wsRecvMsg);

// first 1 bytes are control code

switch (dataStream[0]) {

case 0: // main info

// g_aryLastChartDatas[0] == processing code

// g_aryLastChartDatas[1] == channel num

g_aryLastChartDatas = dataStream;

redraw();

break;

case 1: // additional info (Hz, Volt, ~~)

//----------------------------------------------------------

// 부가 데이터 순서 ( sub info bytes order)

// 0 1 2 3 4 5

// code, collapsed flag, sub scale, scale, freq / 256, freq % 256,

// 6, 8, 10 7,9, 11

// volt (Integer part), volt (Fraction part * 10)

// 12 13

// #total_data / 256, #total_data % 256,

// 14 15

// m_dScrollStart / 256, m_dScrollStart % 256,

// 16

// m_dTracking

//----------------------------------------------------------

if (dataStream[1] == 0) {

g_bCollaped = false;

} else {

g_bCollaped = true;

}

g_dSubScale = dataStream[2];

g_dScale = dataStream[3];

g_dFrequency = dataStream[4] * 256 + dataStream[5];

g_aryVolts[0] = dataStream[6] + dataStream[7] / 10;

g_aryVolts[1] = dataStream[8] + dataStream[9] / 10;

g_aryVolts[2] = dataStream[10] + dataStream[11] / 10;

g_dTotalDataNum = dataStream[12] * 256 + dataStream[13];

g_dScrollPos = dataStream[14] * 256 + dataStream[15];

g_dTrackingFlag = dataStream[16];

redraw();

break;

default:

console.log(dataStream[0]);

break;

}

g_WebSocket.onclose = function (event) {

if (g_bForceCloseWebsocket == false) {

startSocket();

return;

} else {

g_strConntectionStatus = "Connect";

g_WebSocket = null;

redraw();

}

//-------------------------------------------------------------------

// for oscilloscope function

//-------------------------------------------------------------------

var g_OscilloCanvas = null; // target Canvas

var g_Context = null; // context

var g_dChNum = 3; // number of channel

var g_bCollaped = false; // collapse channels or not.

var g_strConntectionStatus = "Connect";

var g_dChartDisplayDataLength = 300;

var g_aryLastChartDatas = null;

var g_aryChColors = ["#3498DB", "#4AA02C", "#C68E17"]; // each channel color

var g_dTrackingFlag = 0;

// oscilloscope top side info

var g_dFrequency = 0; // ch1 frequency

var g_aryVolts = [0.0, 0.0, 0.0]; // volts (3 channels)

var g_dScale = 1; // main scale

var g_dSubScale = 1; // sub scale

var g_dTotalDataNum = 380 * 2; // number of data ( == depth)

var g_dScrollPos = 0; // now scroll pos

// for UI (mouse event)

var g_dLastMouseX = 0, g_dLastMouseY = 0; // Last mouse click pos.

var g_dScrollGrapBarSx = 0, g_dScrollGrapBarEx = 0; // scroll grap bar position

var g_dScrollGrapStartX = 0;

var g_dPrevBtnIndex = -1;

var g_dMouseDownStatus = 0; // 0 : up status, 1 : down status, 2 : scrollbar down status

var g_dNormalButtonStartWidth = 60;

//-------------------------------------------------------------------

// Master functions

//-------------------------------------------------------------------

function initialize() {

g_OscilloCanvas = document.getElementById('oscilloscopeCanvas');

g_Context = g_OscilloCanvas.getContext('2d');

g_OscilloCanvas.addEventListener("mousedown", onMousedown, false);

g_OscilloCanvas.addEventListener("mousemove", onMousemove, false);

g_OscilloCanvas.addEventListener("mouseup", onMouseup, false);

g_OscilloCanvas.addEventListener("touchstart", onMousedown, false);

g_OscilloCanvas.addEventListener("touchmove", onMousemove, false);

// g_OscilloCanvas.addEventListener("touchend", onMouseup, false);

window.addEventListener('resize', resizeCanvas, false);

resizeCanvas();

}

function resizeCanvas() {

g_OscilloCanvas.width = window.innerWidth;

g_OscilloCanvas.height = window.innerHeight;

redraw();

}

function redraw() {

g_Context.save(); //Freeze redraw

g_Context.fillStyle = "#303030";

g_Context.font = "12px Arial";

g_Context.lineWidth = 1;

g_Context.fillRect(0, 0, g_OscilloCanvas.width, g_OscilloCanvas.height);

drawTopside();

drawMiddleSide();

drawBottomSide();

g_Context.restore(); //And now do the redraw

}

//-------------------------------------------------------------------

// for Mouse interface

//-------------------------------------------------------------------

function onMousedown(e) {

g_dLastMouseX = e.pageX;

g_dLastMouseY = e.pageY;

if (g_dMouseDownStatus == 1) { return; }

g_dMouseDownStatus = 1;

g_dPrevBtnIndex = getButtonIndex();

if (g_dPrevBtnIndex >= 0) {

redraw();

} else if (g_dLastMouseX > g_dScrollGrapBarSx && g_dLastMouseX < g_dScrollGrapBarEx

&& g_dLastMouseY < 30) {

g_dScrollGrapStartX = g_dLastMouseX;

g_dMouseDownStatus = 2; // start scrollbar grapping

}

function onMousemove(e) {

g_dLastMouseX = e.pageX;

g_dLastMouseY = e.pageY;

if (g_dMouseDownStatus == 1) {

var dNowBtnIndex = getButtonIndex();

if (g_dPrevBtnIndex != dNowBtnIndex) {

g_dPrevBtnIndex = dNowBtnIndex;

redraw();

}

} else if (g_dMouseDownStatus == 2) { // process scrolling

var gap = (g_dLastMouseX - g_dScrollGrapStartX) * ((g_dTotalDataNum - g_dChartDisplayDataLength) / (100 + g_dScrollGrapBarSx - g_dScrollGrapBarEx));

var dNewScrollPos = parseInt(g_dScrollPos + gap);

if (dNewScrollPos < 0) dNewScrollPos = 0;

if (Math.abs(dNewScrollPos - g_dScrollPos) > 2) {

g_dScrollGrapStartX = g_dLastMouseX;

var tmp = [1, 10, parseInt(dNewScrollPos / 256), parseInt(dNewScrollPos % 256)];

var sendBuffer = new Uint8Array(tmp);

g_WebSocket.send(sendBuffer.buffer);

}

function onMouseup(e) {

g_dMouseDownStatus = 0;

g_dLastMouseX = e.pageX;

g_dLastMouseY = e.pageY;

g_dPrevBtnIndex = -1;

if (g_dLastMouseY < 30 && g_dLastMouseX > (window.innerWidth - 80)) {

if (g_WebSocket == null) { // 'connect', 'disconnect' button

startSocket();

} else {

g_bForceCloseWebsocket = true;

g_WebSocket.close();

g_WebSocket = null;

}

} else {

var btnIndex = getButtonIndex(); // function button

if (btnIndex >= 0 && g_WebSocket != null && g_WebSocket

&& g_WebSocket.readyState == g_WebSocket.OPEN) {

var tmp = [1, btnIndex];

var sendBuffer = new Uint8Array(tmp);

g_WebSocket.send(sendBuffer.buffer);

if (btnIndex == 0) {

g_dTrackingFlag = 1;

redraw();

}

redraw();

}

// 클릭 포인트를 바탕으로 어떤 버튼이 눌려졌는지 조사하는 함수

function getButtonIndex() {

var btnIndex = -1;

if (g_dLastMouseY >= (window.innerHeight - 45)) {

for (let i = 0; i < 7; i++) {

if (g_dLastMouseX >= 5 + i * g_dNormalButtonStartWidth && g_dLastMouseX <= 5 + i * g_dNormalButtonStartWidth + 34) {

btnIndex = i;

break;

}

return btnIndex;

}

//-------------------------------------------------------------------

// Sub Functions

//-------------------------------------------------------------------

function drawTopside() {

// header info

g_Context.font = "18px Arial";

g_Context.textAlign = "left";

g_Context.fillStyle = "#dfdfdf";

g_Context.fillText("Scale : " + g_dSubScale + " / " + g_dScale, 10, 20);

g_Context.fillStyle = g_aryChColors[0];

g_Context.fillText(g_dFrequency + " Hz", 140, 20);

// draw scroll bar...

var scrollsx = window.innerWidth / 2 - 50;

var scrollWidth = 100;

var barWidth = (scrollWidth - 2) * g_dChartDisplayDataLength / g_dTotalDataNum;

g_dScrollGrapBarSx = (scrollWidth - 2) * g_dScrollPos / g_dTotalDataNum + scrollsx + 1;

g_dScrollGrapBarEx = g_dScrollGrapBarSx + barWidth;

g_Context.strokeStyle = "#f3f3f3";

g_Context.beginPath();

drawLine(scrollsx, 6, scrollsx, 23);

drawLine(scrollsx + scrollWidth, 6, scrollsx + scrollWidth, 23);

drawLine(scrollsx, 15, scrollsx + scrollWidth, 15);

g_Context.stroke();

if (g_dMouseDownStatus == 2) {

g_Context.fillStyle = "#5DADE2";

} else { g_Context.fillStyle = "#d6d6d6" };

g_Context.roundRect(g_dScrollGrapBarSx, 11, barWidth, 9, { upperLeft: 2, upperRight: 2, lowerLeft: 2, lowerRight: 2 }, true, false);

// draw connecting status..

g_Context.font = "12px Arial";

if (g_strConntectionStatus == "Connected") {

g_Context.fillStyle = "#1D8348";

} else {

g_Context.fillStyle = "#EC7063";

}

g_Context.roundRect(window.innerWidth - 80, 4, 72, 22, { upperLeft: 3, upperRight: 3, lowerLeft: 3, lowerRight: 3 }, true, false);

g_Context.fillStyle = "#fafafa";

g_Context.textAlign = "center";

g_Context.fillText(g_strConntectionStatus, window.innerWidth - 44, 19);

// bottom line

g_Context.strokeStyle = "#dfdfdf";

g_Context.beginPath();

drawLine(0, 30, window.innerWidth, 30);

g_Context.stroke();

}

function drawMiddleSide() {

// separating line

g_Context.strokeStyle = "#dfdfdf";

g_Context.beginPath();

drawLine(49, 30, 49, window.innerHeight - 50)

g_Context.stroke();

drawChart();

if (g_dTrackingFlag == 1) {

g_Context.fillStyle = "#303030";

g_Context.roundRect(window.innerWidth / 2 - 160, window.innerHeight / 2 - 25, 320, 50, { upperLeft: 3, upperRight: 3, lowerLeft: 3, lowerRight: 3 }, true, false);

g_Context.font = "18px Arial";

g_Context.fillStyle = "#fafafa";

g_Context.textAlign = "center";

g_Context.fillText("Waiting for phase changing...", window.innerWidth / 2, window.innerHeight / 2 + 9);

}

function drawBottomSide() {

// bottom line

g_Context.strokeStyle = "#dfdfdf";

g_Context.beginPath();

drawLine(0, window.innerHeight - 50, window.innerWidth, window.innerHeight - 50)

g_Context.stroke();

//buttons

drawButtons();

}

function drawChart() {

var OneChannelCnt = g_dChartDisplayDataLength; // one channel data count

if (g_aryLastChartDatas != null) {

g_dChNum = g_aryLastChartDatas[1];

}

var allHeight = window.innerHeight - 30 - 50 - 2; // height - topside - bottomside

var allWidth = window.innerWidth - 50; // width - leftside

var hopWidth = allWidth / OneChannelCnt;

var yPos = [30 + allHeight, 30 + allHeight, 30 + allHeight];

var eachMax = allHeight - 4;

g_Context.strokeStyle = "#dfdfdf";

g_Context.fillStyle = g_aryChColors[0];

g_Context.fillText(g_aryVolts[0] + " V", 22, 66);

g_Context.fillRect(0, 31, 49, 20);

g_Context.fillStyle = "#dfdfdf";

g_Context.fillText("CH 1", 22, 46);

if (g_bCollaped == false) {

switch (g_dChNum) {

case 1:

yPos[0] = 30 + allHeight - 2;

break;

case 2: // display 2nd channel

yPos[0] = 30 + allHeight / 2 - 2;

yPos[1] = 30 + allHeight - 2;

eachMax = allHeight / 2 - 4;

g_Context.beginPath();

drawLine(0, 30 + allHeight / 2 + 2, window.innerWidth, 30 + allHeight / 2 + 2);

g_Context.stroke();

g_Context.fillStyle = g_aryChColors[1];

g_Context.fillText(g_aryVolts[1] + " V", 22, yPos[0] + 40);

g_Context.fillRect(0, yPos[0] + 5, 49, 20);

g_Context.fillStyle = "#dfdfdf";

g_Context.fillText("CH 2", 22, yPos[0] + 20);

break;

case 3: // display 3th channel

yPos[0] = 30 + allHeight / 3 - 2;

yPos[1] = 30 + allHeight * 2 / 3 - 2;

yPos[2] = 30 + allHeight - 2;

eachMax = allHeight / 3 - 4;

g_Context.beginPath();

drawLine(0, 30 + allHeight / 3 + 2, window.innerWidth, 30 + allHeight / 3 + 2);

drawLine(0, 30 + allHeight * 2 / 3 + 2, window.innerWidth, 30 + allHeight * 2 / 3 + 2);

g_Context.stroke();

g_Context.fillStyle = g_aryChColors[1];

g_Context.fillText(g_aryVolts[1] + " V", 22, yPos[0] + 40);

g_Context.fillRect(0, yPos[0] + 5, 49, 20);

g_Context.fillStyle = "#dfdfdf";

g_Context.fillText("CH 2", 22, yPos[0] + 20);

g_Context.fillStyle = g_aryChColors[2];

g_Context.fillText(g_aryVolts[2] + " V", 22, yPos[1] + 40);

g_Context.fillRect(0, yPos[1] + 5, 49, 20);

g_Context.fillStyle = "#dfdfdf";

g_Context.fillText("CH 3", 22, yPos[1] + 19);

default:

break;

}

} else {

for (let i = 1; i < g_dChNum; i++) {

g_Context.fillStyle = g_aryChColors[i];

g_Context.fillText(g_aryVolts[i] + " V", 22, 66 + i * 61);

g_Context.fillRect(0, 31 + i * 61, 49, 20);

g_Context.fillStyle = "#dfdfdf";

g_Context.fillText("CH " + (i + 1), 22, 46 + i * 61);

}

if (g_aryLastChartDatas == null) {

return;

}

ratio = eachMax / 256;

for (let j = 2; j >= 0; j--) {

if (j >= g_dChNum) {

continue;

}

g_Context.strokeStyle = g_aryChColors[j];

g_Context.beginPath();

g_Context.moveTo(50, yPos[j] - g_aryLastChartDatas[2 + j * OneChannelCnt] * ratio);

for (let index = 0; index < OneChannelCnt; index++) {

g_Context.lineTo(50 + index * hopWidth, yPos[j] - g_aryLastChartDatas[2 + index + j * OneChannelCnt] * ratio);

}

g_Context.stroke();

}

function drawButtons() {

var shapeColor = "#dfdfdf";

var backColor = "#505050";

var sy = window.innerHeight - 40;

g_Context.lineWidth = 3;

// 모든 버튼은 원, 선, 점등으로 한땀 한땀 그렷다.

for (let i = 0; i < 7; i++) {

//var sx = 5 + i * 47;

var sx = 5 + i * g_dNormalButtonStartWidth;

if (i == g_dPrevBtnIndex) {

g_Context.fillStyle = "#5DADE2";

g_Context.strokeStyle = "#5DADE2";

} else {

g_Context.fillStyle = "#d3d3d3";

g_Context.strokeStyle = "#d3d3d3";

}

g_Context.roundRect(sx, sy, 34, 30, { upperLeft: 3, upperRight: 3, lowerLeft: 3, lowerRight: 3 }, false, true);

switch (i) {

case 0: // 추적 모드인경우에는 T 자 모양을 다른 색으로 표시한다.

// T

g_Context.fillStyle = "#dfdfdf";

if (g_dTrackingFlag == 1) {

g_Context.fillStyle = "#F5B041";

} else if (2 == g_dTrackingFlag) {

g_Context.fillStyle = "#3498DB";

}

g_Context.fillRect(sx + 6, sy + 6, 21, 4);

g_Context.fillRect(sx + 15, sy + 10, 4, 14);

break;

case 1: // zoom in

g_Context.beginPath();

g_Context.arc(sx + 16, sy + 14, 10, 0, 2 * Math.PI, false);

g_Context.moveTo(sx + 24, sy + 21); g_Context.lineTo(sx + 28, sy + 25);

g_Context.moveTo(sx + 16, sy + 9); g_Context.lineTo(sx + 16, sy + 19);

g_Context.moveTo(sx + 11, sy + 14); g_Context.lineTo(sx + 21, sy + 14);

g_Context.stroke();

break;

case 2: // zoom out

g_Context.beginPath();

g_Context.arc(sx + 16, sy + 14, 10, 0, 2 * Math.PI, false);

g_Context.moveTo(sx + 24, sy + 21); g_Context.lineTo(sx + 28, sy + 25);

g_Context.moveTo(sx + 11, sy + 14); g_Context.lineTo(sx + 21, sy + 14);

g_Context.stroke();

break;

case 3: // <<<>

g_Context.beginPath();

g_Context.moveTo(sx + 22, sy + 7); g_Context.lineTo(sx + 8, sy + 14); g_Context.lineTo(sx + 22, sy + 21);

g_Context.stroke();

break;

case 4: // >

g_Context.beginPath();

g_Context.moveTo(sx + 11, sy + 7); g_Context.lineTo(sx + 25, sy + 14); g_Context.lineTo(sx + 11, sy + 21);

g_Context.stroke();

break;

case 5: // collapse channel on or off

g_Context.lineWidth = 2;

g_Context.beginPath();

if (g_bCollaped) {

drawLine(sx + 6, sy + 14, sx + 27, sy + 14);

drawLine(sx + 8, sy + 12, sx + 12, sy + 8);

drawLine(sx + 12, sy + 8, sx + 16, sy + 12);

drawLine(sx + 16, sy + 12, sx + 21, sy + 7);

drawLine(sx + 21, sy + 7, sx + 25, sy + 11);

drawLine(sx + 8, sy + 19, sx + 11, sy + 16);

drawLine(sx + 11, sy + 16, sx + 16, sy + 21);

drawLine(sx + 16, sy + 21, sx + 21, sy + 16);

drawLine(sx + 21, sy + 16, sx + 26, sy + 20);

} else {

drawLine(sx + 8, sy + 15, sx + 12, sy + 11);

drawLine(sx + 12, sy + 11, sx + 19, sy + 18);

drawLine(sx + 19, sy + 18, sx + 25, sy + 9);

}

g_Context.stroke();

g_Context.lineWidth = 3;

break;

case 6: // change channel number

g_Context.textAlign = "center";

g_Context.fillText("CH+", sx + 17, sy + 19);

break;

}

function drawLine(sx, sy, ex, ey) {

g_Context.moveTo(sx, sy); g_Context.lineTo(ex, ey);

}

</script>

</head>

</body>

</html>

Andy Kim

2018년 11월 29일 목요일

ESP로 오실로스코프를 만들자 - #4 (최소 크기 및 비용편) - 소스코드 #2

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