Add aa-graph_viewer.h

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2025-12-03 08:39:33 +00:00
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#ifndef GRAPH_VIEWER_H
#define GRAPH_VIEWER_H
const char graph_viewer_html PROGMEM = R"rawliteral(
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>CAN Signal Graph Viewer - Real-time</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background: #1a1a1a;
color: white;
overflow-x: hidden;
}
.header {
background: linear-gradient(135deg, #43cea2 0%, #185a9d 100%);
padding: 15px 20px;
text-align: center;
box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.header h1 {
font-size: 1.5em;
margin-bottom: 5px;
}
.header p {
font-size: 0.9em;
opacity: 0.9;
}
.header-stats {
display: flex;
justify-content: center;
gap: 20px;
margin-top: 10px;
font-size: 0.85em;
}
.header-stat {
display: flex;
flex-direction: column;
align-items: center;
}
.header-stat-label {
opacity: 0.8;
font-size: 0.9em;
}
.header-stat-value {
font-size: 1.2em;
font-weight: 700;
font-family: 'Courier New', monospace;
}
.controls {
background: #2a2a2a;
padding: 12px 15px;
display: flex;
gap: 12px;
justify-content: center;
flex-wrap: wrap;
box-shadow: 0 2px 5px rgba(0,0,0,0.2);
border-bottom: 2px solid #3a3a3a;
}
.control-group {
display: flex;
gap: 8px;
align-items: center;
background: #333;
padding: 5px 10px;
border-radius: 5px;
}
.control-label {
font-size: 0.85em;
color: #aaa;
white-space: nowrap;
}
.btn {
padding: 8px 16px;
border: none;
border-radius: 5px;
font-size: 0.85em;
font-weight: 600;
cursor: pointer;
transition: all 0.3s;
white-space: nowrap;
}
.btn-success { background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%); color: white; }
.btn-danger { background: linear-gradient(135deg, #eb3349 0%, #f45c43 100%); color: white; }
.btn-info { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; }
.btn-warning { background: linear-gradient(135deg, #f2994a 0%, #f2c94c 100%); color: white; }
.btn-secondary { background: linear-gradient(135deg, #95a5a6 0%, #7f8c8d 100%); color: white; }
.btn:hover {
transform: translateY(-2px);
box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}
.btn.active {
box-shadow: inset 0 3px 5px rgba(0,0,0,0.3);
transform: translateY(0);
}
.stats-bar {
padding: 12px 15px;
background: #2a2a2a;
color: #aaa;
font-size: 0.85em;
display: flex;
justify-content: space-between;
align-items: center;
flex-wrap: wrap;
gap: 15px;
border-bottom: 1px solid #3a3a3a;
}
.stat-item {
display: flex;
align-items: center;
gap: 8px;
}
.stat-label {
opacity: 0.7;
}
.stat-value {
color: #43cea2;
font-weight: 700;
font-family: 'Courier New', monospace;
}
.graphs {
padding: 15px;
display: grid;
grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
gap: 15px;
max-height: calc(100vh - 280px);
overflow-y: auto;
}
.graph-container {
background: #2a2a2a;
padding: 15px;
border-radius: 10px;
border: 2px solid #3a3a3a;
transition: all 0.3s;
}
.graph-container:hover {
border-color: #43cea2;
box-shadow: 0 4px 12px rgba(67, 206, 162, 0.2);
}
.graph-header {
display: flex;
justify-content: space-between;
align-items: flex-start;
margin-bottom: 10px;
padding-bottom: 8px;
border-bottom: 2px solid #43cea2;
gap: 10px;
}
.graph-title-container {
flex: 1;
min-width: 0;
}
.graph-title {
font-size: 1em;
font-weight: 600;
color: #43cea2;
margin-bottom: 3px;
word-wrap: break-word;
}
.graph-subtitle {
font-size: 0.75em;
color: #777;
font-family: 'Courier New', monospace;
}
.graph-value-container {
text-align: right;
min-width: 100px;
}
.graph-value {
font-size: 1.3em;
font-weight: 700;
color: #38ef7d;
font-family: 'Courier New', monospace;
white-space: nowrap;
}
.graph-value-text {
font-size: 0.8em;
color: #aaa;
margin-top: 2px;
}
canvas {
width: 100%;
height: 250px;
border: 1px solid #3a3a3a;
border-radius: 5px;
background: #1a1a1a;
}
.status {
position: fixed;
top: 10px;
right: 10px;
padding: 10px 15px;
border-radius: 5px;
background: #2a2a2a;
border: 2px solid #43cea2;
font-size: 0.9em;
z-index: 1000;
font-weight: 600;
}
.status.disconnected {
border-color: #eb3349;
background: #3a2a2a;
animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
0%, 100% { opacity: 1; }
50% { opacity: 0.7; }
}
.no-signals {
text-align: center;
padding: 60px 20px;
color: #666;
}
.no-signals-icon {
font-size: 4em;
margin-bottom: 20px;
opacity: 0.5;
}
@media (max-width: 768px) {
.graphs {
grid-template-columns: 1fr;
max-height: none;
}
canvas { height: 200px; }
.controls {
gap: 8px;
}
.control-group {
width: 100%;
justify-content: center;
}
.stats-bar {
flex-direction: column;
align-items: flex-start;
}
}
</style>
</head>
<body>
<div class="header">
<h1>📊 Real-time CAN Signal Graphs</h1>
<p>Scatter Plot Mode - Viewing <strong id="graph-count">0</strong> signals</p>
<div class="header-stats">
<div class="header-stat">
<div class="header-stat-label">Recording Time</div>
<div class="header-stat-value" id="recording-time">0s</div>
</div>
<div class="header-stat">
<div class="header-stat-label">Messages Received</div>
<div class="header-stat-value" id="msg-received">0</div>
</div>
<div class="header-stat">
<div class="header-stat-label">Data Points</div>
<div class="header-stat-value" id="data-point-count">0</div>
</div>
</div>
</div>
<div class="controls">
<div class="control-group">
<button class="btn btn-success" onclick="startGraphing()"> Start</button>
<button class="btn btn-danger" onclick="stopGraphing()"> Pause</button>
</div>
<div class="control-group">
<span class="control-label">X-Axis:</span>
<button class="btn btn-info active" id="btn-index-mode" onclick="setScaleMode('index')">Index</button>
<button class="btn btn-info" id="btn-time-mode" onclick="setScaleMode('time')">Time</button>
</div>
<div class="control-group">
<span class="control-label">Range:</span>
<button class="btn btn-warning active" id="btn-range-10s" onclick="setRangeMode('10s')">10s</button>
<button class="btn btn-warning" id="btn-range-all" onclick="setRangeMode('all')">All</button>
</div>
<div class="control-group">
<span class="control-label">Sort:</span>
<button class="btn btn-info active" id="btn-sort-selection" onclick="setSortMode('selection')">Selection</button>
<button class="btn btn-info" id="btn-sort-name-asc" onclick="setSortMode('name-asc')">AZ</button>
<button class="btn btn-info" id="btn-sort-name-desc" onclick="setSortMode('name-desc')">ZA</button>
</div>
<div class="control-group">
<button class="btn btn-success" onclick="downloadCSV()">📥 CSV</button>
<button class="btn btn-danger" onclick="clearData()">🗑 Clear</button>
<button class="btn btn-secondary" onclick="window.close()"> Close</button>
</div>
</div>
<div class="status" id="status">Connecting...</div>
<div class="graphs" id="graphs"></div>
<script>
let ws;
let charts = {};
let graphing = false;
let startTime = 0;
let selectedSignals = [];
let dbcData = {};
let lastTimestamps = {};
let sortMode = 'selection';
const MAX_DATA_POINTS = 60;
let scaleMode = 'index';
let rangeMode = '10s';
let totalMsgReceived = 0;
let lastCanCounts = {};
let updateInterval = null;
const COLORS = [
{line: '#FF6384', fill: 'rgba(255, 99, 132, 0.2)'},
{line: '#36A2EB', fill: 'rgba(54, 162, 235, 0.2)'},
{line: '#FFCE56', fill: 'rgba(255, 206, 86, 0.2)'},
{line: '#4BC0C0', fill: 'rgba(75, 192, 192, 0.2)'},
{line: '#9966FF', fill: 'rgba(153, 102, 255, 0.2)'},
{line: '#FF9F40', fill: 'rgba(255, 159, 64, 0.2)'},
{line: '#E74C3C', fill: 'rgba(231, 76, 60, 0.2)'},
{line: '#3498DB', fill: 'rgba(52, 152, 219, 0.2)'},
{line: '#2ECC71', fill: 'rgba(46, 204, 113, 0.2)'},
{line: '#F39C12', fill: 'rgba(243, 156, 18, 0.2)'},
{line: '#9B59B6', fill: 'rgba(155, 89, 182, 0.2)'},
{line: '#1ABC9C', fill: 'rgba(26, 188, 156, 0.2)'},
{line: '#E67E22', fill: 'rgba(230, 126, 34, 0.2)'},
{line: '#95A5A6', fill: 'rgba(149, 165, 166, 0.2)'},
{line: '#34495E', fill: 'rgba(52, 73, 94, 0.2)'},
{line: '#16A085', fill: 'rgba(22, 160, 133, 0.2)'},
{line: '#27AE60', fill: 'rgba(39, 174, 96, 0.2)'},
{line: '#2980B9', fill: 'rgba(41, 128, 185, 0.2)'},
{line: '#8E44AD', fill: 'rgba(142, 68, 173, 0.2)'},
{line: '#C0392B', fill: 'rgba(192, 57, 43, 0.2)'}
];
class SimpleChart {
constructor(canvas, signal, colorIndex) {
this.canvas = canvas;
this.ctx = canvas.getContext('2d');
this.signal = signal;
this.data = [];
this.times = [];
this.labels = [];
this.rawValues = [];
this.colors = COLORS[colorIndex % COLORS.length];
this.currentValue = 0;
this.currentText = '';
this.resizeCanvas();
window.addEventListener('resize', () => this.resizeCanvas());
}
resizeCanvas() {
const rect = this.canvas.getBoundingClientRect();
this.canvas.width = rect.width * window.devicePixelRatio;
this.canvas.height = rect.height * window.devicePixelRatio;
this.ctx.scale(window.devicePixelRatio, window.devicePixelRatio);
this.width = rect.width;
this.height = rect.height;
this.draw();
}
addData(value, time) {
this.data.push(value);
this.times.push(parseFloat(time));
this.labels.push(time);
this.rawValues.push(value);
this.currentValue = value;
if (this.signal.valueTable && this.signal.valueTable[value] !== undefined) {
this.currentText = this.signal.valueTable[value];
} else {
this.currentText = '';
}
if (scaleMode === 'index' && this.data.length > MAX_DATA_POINTS) {
this.data.shift();
this.times.shift();
this.labels.shift();
this.rawValues.shift();
}
this.draw();
}
getValueText(value) {
if (this.signal.valueTable && this.signal.valueTable[value] !== undefined) {
return this.signal.valueTable[value];
}
return value.toFixed(2);
}
draw() {
if (this.data.length === 0) return;
const ctx = this.ctx;
const padding = 50;
const graphWidth = this.width - padding * 2;
const graphHeight = this.height - padding * 2;
ctx.clearRect(0, 0, this.width, this.height);
let displayData = [];
let displayTimes = [];
let displayLabels = [];
if (rangeMode === '10s') {
const currentTime = this.times[this.times.length - 1];
for (let i = 0; i < this.times.length; i++) {
if (currentTime - this.times[i] <= 10) {
displayData.push(this.data[i]);
displayTimes.push(this.times[i]);
displayLabels.push(this.labels[i]);
}
}
} else {
displayData = [...this.data];
displayTimes = [...this.times];
displayLabels = [...this.labels];
}
if (displayData.length === 0) return;
const minValue = Math.min(...displayData);
const maxValue = Math.max(...displayData);
const range = maxValue - minValue || 1;
let minTime, maxTime, timeRange;
if (scaleMode === 'time') {
minTime = displayTimes[0];
maxTime = displayTimes[displayTimes.length - 1];
timeRange = maxTime - minTime || 1;
}
// 축 그리기
ctx.strokeStyle = '#444';
ctx.lineWidth = 1;
ctx.beginPath();
ctx.moveTo(padding, padding);
ctx.lineTo(padding, this.height - padding);
ctx.lineTo(this.width - padding, this.height - padding);
ctx.stroke();
// Y축 레이블
ctx.fillStyle = '#aaa';
ctx.font = '11px Arial';
ctx.textAlign = 'right';
if (this.signal.valueTable) {
const uniqueValues = [...new Set(displayData)].sort((a, b) => a - b);
if (uniqueValues.length <= 6) {
uniqueValues.forEach((val) => {
const y = this.height - padding - ((val - minValue) / range) * graphHeight;
const text = this.getValueText(val);
ctx.fillText(text, padding - 5, y + 5);
});
} else {
ctx.fillText(this.getValueText(maxValue), padding - 5, padding + 5);
ctx.fillText(this.getValueText(minValue), padding - 5, this.height - padding);
}
} else {
ctx.fillText(maxValue.toFixed(2), padding - 5, padding + 5);
ctx.fillText(minValue.toFixed(2), padding - 5, this.height - padding);
}
// X축 레이블
ctx.textAlign = 'center';
if (displayLabels.length > 0) {
ctx.fillText(displayLabels[0] + 's', padding, this.height - padding + 15);
if (displayLabels.length > 1) {
const lastIdx = displayLabels.length - 1;
let xPos = scaleMode === 'time' ? this.width - padding :
padding + (graphWidth / (MAX_DATA_POINTS - 1)) * Math.min(lastIdx, MAX_DATA_POINTS - 1);
ctx.fillText(displayLabels[lastIdx] + 's', xPos, this.height - padding + 15);
}
}
ctx.fillText('Time (sec)', this.width / 2, this.height - 5);
// 그리드
ctx.strokeStyle = '#333';
ctx.lineWidth = 1;
for (let i = 1; i < 5; i++) {
const y = padding + (graphHeight / 5) * i;
ctx.beginPath();
ctx.moveTo(padding, y);
ctx.lineTo(this.width - padding, y);
ctx.stroke();
}
// 데이터 포인트 (Scatter)
ctx.fillStyle = this.colors.line;
for (let i = 0; i < displayData.length; i++) {
let x = scaleMode === 'time' ?
padding + graphWidth * ((displayTimes[i] - minTime) / timeRange) :
padding + (graphWidth / (MAX_DATA_POINTS - 1)) * i;
const y = this.height - padding - ((displayData[i] - minValue) / range) * graphHeight;
ctx.beginPath();
ctx.arc(x, y, 5, 0, Math.PI * 2);
ctx.fill();
ctx.strokeStyle = '#fff';
ctx.lineWidth = 1;
ctx.stroke();
}
}
}
function initWebSocket() {
ws = new WebSocket('ws://' + window.location.hostname + ':81');
ws.onopen = function() {
console.log(' WebSocket connected');
updateStatus('Connected', false);
};
ws.onclose = function() {
console.log(' WebSocket disconnected');
updateStatus('Disconnected - Reconnecting...', true);
setTimeout(initWebSocket, 3000);
};
ws.onmessage = function(event) {
try {
const data = JSON.parse(event.data);
if (graphing && data.type === 'update') {
if (data.messages && data.messages.length > 0) {
processCANMessages(data.messages);
}
}
} catch(e) {
console.error('Parse error:', e);
}
};
}
function updateStatus(text, isError) {
const status = document.getElementById('status');
status.textContent = text;
status.className = 'status' + (isError ? ' disconnected' : '');
}
function loadData() {
try {
const signals = localStorage.getItem('selected_signals');
const dbc = localStorage.getItem('dbc_content');
const savedSortMode = localStorage.getItem('sort_mode');
if (!signals || !dbc) {
alert(' No signals selected. Please select signals in Graph Setup page first.');
window.close();
return false;
}
if (savedSortMode) sortMode = savedSortMode;
selectedSignals = JSON.parse(signals);
dbcData = { messages: {} };
selectedSignals.forEach(sig => {
if (!dbcData.messages[sig.messageId]) {
dbcData.messages[sig.messageId] = {
id: sig.messageId,
signals: []
};
}
dbcData.messages[sig.messageId].signals.push(sig);
});
console.log(' Loaded ' + selectedSignals.length + ' signals');
return true;
} catch(e) {
console.error(' Failed to load data:', e);
alert('Failed to load signal data');
window.close();
return false;
}
}
function sortSignalsForDisplay() {
if (sortMode === 'name-asc') {
return [...selectedSignals].sort((a, b) => a.name.localeCompare(b.name));
} else if (sortMode === 'name-desc') {
return [...selectedSignals].sort((a, b) => b.name.localeCompare(a.name));
}
return selectedSignals;
}
function setSortMode(mode) {
sortMode = mode;
document.querySelectorAll('[id^="btn-sort-"]').forEach(btn => btn.classList.remove('active'));
document.getElementById('btn-sort-' + mode).classList.add('active');
createGraphs();
console.log('Sort mode: ' + mode);
}
function createGraphs() {
const graphsDiv = document.getElementById('graphs');
graphsDiv.innerHTML = '';
charts = {};
const sortedSignals = sortSignalsForDisplay();
if (sortedSignals.length === 0) {
graphsDiv.innerHTML =
'<div class="no-signals">' +
'<div class="no-signals-icon">📊</div>' +
'<div style="font-size: 1.2em; margin-bottom: 10px;"><strong>No Signals Selected</strong></div>' +
'<div style="color: #777;">Please select signals in the Graph Setup page</div>' +
'</div>';
return;
}
sortedSignals.forEach((signal, index) => {
const container = document.createElement('div');
container.className = 'graph-container';
const canvas = document.createElement('canvas');
canvas.id = 'chart-' + index;
const canIdHex = '0x' + signal.messageId.toString(16).toUpperCase().padStart(3, '0');
const subtitle = canIdHex + ' | ' + signal.messageName + ' | Bit: ' + signal.startBit + '|' + signal.bitLength;
container.innerHTML =
'<div class="graph-header">' +
'<div class="graph-title-container">' +
'<div class="graph-title">' + signal.name +
(signal.unit ? ' [' + signal.unit + ']' : '') + '</div>' +
'<div class="graph-subtitle">' + subtitle + '</div>' +
'</div>' +
'<div class="graph-value-container">' +
'<div class="graph-value" id="value-' + index + '">-</div>' +
'<div class="graph-value-text" id="text-' + index + '"></div>' +
'</div>' +
'</div>';
container.appendChild(canvas);
graphsDiv.appendChild(container);
charts[index] = new SimpleChart(canvas, signal, index);
});
document.getElementById('graph-count').textContent = sortedSignals.length;
}
function startGraphing() {
if (!graphing) {
graphing = true;
startTime = Date.now();
lastTimestamps = {};
lastCanCounts = {};
updateStatus('Recording...', false);
console.log(' Started graphing');
// 통계 업데이트 시작 (1초마다)
if (updateInterval) clearInterval(updateInterval);
updateInterval = setInterval(updateStatistics, 1000);
}
}
function stopGraphing() {
graphing = false;
if (updateInterval) {
clearInterval(updateInterval);
updateInterval = null;
}
updateStatus('Paused', false);
console.log(' Paused graphing');
}
function setScaleMode(mode) {
scaleMode = mode;
document.getElementById('btn-index-mode').classList.toggle('active', mode === 'index');
document.getElementById('btn-time-mode').classList.toggle('active', mode === 'time');
Object.values(charts).forEach(chart => chart.draw());
console.log('Scale mode: ' + mode);
}
function setRangeMode(mode) {
rangeMode = mode;
document.getElementById('btn-range-10s').classList.toggle('active', mode === '10s');
document.getElementById('btn-range-all').classList.toggle('active', mode === 'all');
Object.values(charts).forEach(chart => chart.draw());
console.log('Range mode: ' + mode);
}
function processCANMessages(messages) {
const elapsedTime = ((Date.now() - startTime) / 1000).toFixed(1);
const sortedSignals = sortSignalsForDisplay();
let processedCount = 0;
messages.forEach(canMsg => {
let msgId = canMsg.id;
if (typeof msgId === 'string') {
msgId = parseInt(msgId.replace('0x', ''), 16);
}
if (msgId & 0x80000000) {
msgId = msgId & 0x1FFFFFFF;
}
const prevCount = lastCanCounts[msgId] || 0;
const currentCount = canMsg.count || 0;
if (currentCount <= prevCount) return;
lastCanCounts[msgId] = currentCount;
totalMsgReceived++;
let hexData = '';
if (Array.isArray(canMsg.data)) {
hexData = canMsg.data.map(b => b.toString(16).padStart(2, '0')).join('');
} else if (typeof canMsg.data === 'string') {
hexData = canMsg.data.replace(/\s/g, '');
}
sortedSignals.forEach((signal, index) => {
if (signal.messageId === msgId && charts[index]) {
try {
const value = decodeSignalFromHex(signal, hexData);
charts[index].addData(value, elapsedTime);
const valueDiv = document.getElementById('value-' + index);
const textDiv = document.getElementById('text-' + index);
if (valueDiv) {
if (signal.valueTable && signal.valueTable[value] !== undefined) {
valueDiv.textContent = value.toFixed(0);
if (textDiv) {
textDiv.textContent = signal.valueTable[value];
}
} else {
valueDiv.textContent = value.toFixed(2) + (signal.unit ? ' ' + signal.unit : '');
if (textDiv) {
textDiv.textContent = '';
}
}
}
processedCount++;
} catch(e) {
console.error('Decode error (' + signal.name + '):', e);
}
}
});
});
}
function updateStatistics() {
let totalDataPoints = 0;
Object.values(charts).forEach(chart => {
totalDataPoints += chart.data.length;
});
document.getElementById('data-point-count').textContent = totalDataPoints;
document.getElementById('msg-received').textContent = totalMsgReceived;
const recordingTime = ((Date.now() - startTime) / 1000).toFixed(1);
document.getElementById('recording-time').textContent = recordingTime + 's';
}
function decodeSignalFromHex(signal, hexData) {
const bytes = [];
const cleanHex = hexData.toUpperCase();
for (let i = 0; i < cleanHex.length && i < 16; i += 2) {
bytes.push(parseInt(cleanHex.substring(i, i + 2), 16));
}
while (bytes.length < 8) bytes.push(0);
return decodeSignalFromBytes(signal, bytes);
}
function decodeSignalFromBytes(signal, bytes) {
let rawValue = 0;
if (signal.byteOrder === 'intel') {
for (let i = 0; i < signal.bitLength; i++) {
const bitPos = signal.startBit + i;
const byteIdx = Math.floor(bitPos / 8);
const bitIdx = bitPos % 8;
if (byteIdx < bytes.length) {
const bit = (bytes[byteIdx] >> bitIdx) & 1;
rawValue |= (bit << i);
}
}
} else {
for (let i = 0; i < signal.bitLength; i++) {
const bitPos = signal.startBit - i;
const byteIdx = Math.floor(bitPos / 8);
const bitIdx = 7 - (bitPos % 8);
if (byteIdx < bytes.length && byteIdx >= 0) {
const bit = (bytes[byteIdx] >> bitIdx) & 1;
rawValue |= (bit << (signal.bitLength - 1 - i));
}
}
}
if (signal.signed && (rawValue & (1 << (signal.bitLength - 1)))) {
rawValue -= (1 << signal.bitLength);
}
return rawValue * signal.factor + signal.offset;
}
function downloadCSV() {
if (Object.keys(charts).length === 0) {
alert(' No data to download!');
return;
}
let csvContent = 'Time(s)';
const sortedSignals = sortSignalsForDisplay();
sortedSignals.forEach(signal => {
const unit = signal.unit ? ' [' + signal.unit + ']' : '';
csvContent += ',' + signal.name + unit;
if (signal.valueTable) {
csvContent += ',' + signal.name + '_Text';
}
});
csvContent += '\n';
let maxLength = 0;
Object.values(charts).forEach(chart => {
if (chart.labels.length > maxLength) {
maxLength = chart.labels.length;
}
});
for (let i = 0; i < maxLength; i++) {
let row = '';
let timeValue = '';
sortedSignals.forEach((signal, index) => {
const chart = charts[index];
if (chart && chart.labels[i] !== undefined) {
if (timeValue === '') timeValue = chart.labels[i];
const value = chart.data[i];
row += ',' + value.toFixed(6);
if (signal.valueTable) {
const text = signal.valueTable[value] !== undefined ?
signal.valueTable[value] : '';
row += ',"' + text + '"';
}
} else {
row += ',';
if (signal.valueTable) row += ',';
}
});
if (timeValue !== '') {
csvContent += timeValue + row + '\n';
}
}
const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
const link = document.createElement('a');
const url = URL.createObjectURL(blob);
const timestamp = new Date().toISOString().replace(/[:.]/g, '-').slice(0, -5);
link.setAttribute('href', url);
link.setAttribute('download', 'can_signals_' + timestamp + '.csv');
link.style.visibility = 'hidden';
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
console.log(' CSV downloaded: ' + maxLength + ' points');
}
function clearData() {
if (!confirm(' Clear all recorded data? This cannot be undone.')) return;
Object.values(charts).forEach(chart => {
chart.data = [];
chart.times = [];
chart.labels = [];
chart.rawValues = [];
chart.currentValue = 0;
chart.currentText = '';
chart.draw();
});
lastTimestamps = {};
lastCanCounts = {};
startTime = Date.now();
totalMsgReceived = 0;
updateStatistics();
console.log(' Data cleared');
}
if (loadData()) {
createGraphs();
initWebSocket();
startGraphing();
}
</script>
</body>
</html>
)rawliteral";
#endif