500 lines
14 KiB
JavaScript
500 lines
14 KiB
JavaScript
window.addEventListener('DOMContentLoaded', () => {
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const connectButton = document.getElementById('connect-button');
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const disconnectButton = document.getElementById('disconnect-button');
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const startButton = document.getElementById('start-button');
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const stopButton = document.getElementById('stop-button');
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const canvas = document.getElementById('monitor-canvas');
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const ctx = canvas.getContext('2d');
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// 全局变量
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let port = null;
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let reader = null;
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let writer = null;
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let deviceState = 0; // 0: 未连接, 1: 已连接
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let refreshInterval = 200; // 刷新间隔（毫秒）
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let animationId = null;
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let lastRefreshTime = 0;
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// 显示参数
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const SHOW_WIDTH = 350; // 屏幕宽度
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const SHOW_HEIGHT = 172; // 屏幕高度
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// RGB565颜色定义
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const RED = 0xF800;
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const GREEN = 0x07E0;
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const BLUE = 0x001F;
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const WHITE = 0xFFFF;
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const BLACK = 0x0000;
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const YELLOW = 0xFFE0;
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const CYAN = 0x07FF;
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const MAGENTA = 0xF81F;
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const ORANGE = 0xFC00;
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// 模拟系统监控数据
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class SystemMonitor {
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constructor() {
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this.monitorData = {};
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this.font = '32px Arial';
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}
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collectSystemData() {
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let date = new Date();
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// 生成模拟数据
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this.monitorData = {
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row_1: {
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value: `${String(date.getFullYear()).padStart(2, '0')}-${String(date.getMonth() + 1).padStart(2, '0')}-${String(date.getDate()).padStart(2, '0')}`,
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label: '日期',
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unit: '',
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detail: '',
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color: '#FFFF00',
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icon: 'I',
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},
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row_2: {
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value: `${String(date.getHours()).padStart(2, '0')}:${String(date.getMinutes()).padStart(2, '0')}:${String(date.getSeconds()).padStart(2, '0')}`,
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label: '时间',
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unit: '',
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detail: '',
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color: '#00FFFF',
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icon: 'I',
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},
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row_3: {
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value: `${String(date.getFullYear()).padStart(2, '0')}-${String(date.getMonth() + 1).padStart(2, '0')}-${String(date.getDate()).padStart(2, '0')}`,
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label: '日期',
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unit: '',
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detail: '',
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color: '#FFFF00',
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icon: 'I',
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},
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row_4: {
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value: `${String(date.getHours()).padStart(2, '0')}:${String(date.getMinutes()).padStart(2, '0')}:${String(date.getSeconds()).padStart(2, '0')}`,
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label: '时间',
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unit: '',
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detail: '',
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color: '#00FFFF',
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icon: 'I',
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},
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};
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return this.monitorData;
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}
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formatDisplayText(key, showIcon = false) {
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if (!this.monitorData[key]) {
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return '';
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}
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const item = this.monitorData[key];
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const iconPart = showIcon ? `[${item.icon}] ` : '';
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const detailPart = item.detail || '';
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if (detailPart) {
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return `${iconPart}${item.label}: ${item.value}${item.unit} ${detailPart}`;
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} else {
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return `${iconPart}${item.label}: ${item.value}${item.unit}`;
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}
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}
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rgb565ToRgb(color565) {
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const r = ((color565 >> 11) & 0x1F) << 3;
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const g = ((color565 >> 5) & 0x3F) << 2;
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const b = (color565 & 0x1F) << 3;
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return [r, g, b];
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}
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hexToRgb(hexColor) {
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if (typeof hexColor === 'number') {
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return this.rgb565ToRgb(hexColor);
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}
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if (typeof hexColor === 'string' && hexColor.startsWith('#')) {
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const hex = hexColor.slice(1);
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if (hex.length === 3) {
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const r = parseInt(hex[0] + hex[0], 16);
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const g = parseInt(hex[1] + hex[1], 16);
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const b = parseInt(hex[2] + hex[2], 16);
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return [r, g, b];
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} else if (hex.length === 6) {
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const r = parseInt(hex.slice(0, 2), 16);
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const g = parseInt(hex.slice(2, 4), 16);
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const b = parseInt(hex.slice(4, 6), 16);
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return [r, g, b];
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}
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}
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return [255, 255, 255];
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}
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createDisplayImage() {
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this.collectSystemData();
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// 清空画布
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ctx.fillStyle = 'black';
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ctx.fillRect(0, 0, SHOW_WIDTH, SHOW_HEIGHT);
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// 绘制网格布局
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this.drawGridLayout();
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return canvas;
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}
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drawGridLayout() {
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const layouts = [
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{ key: 'row_1', position: [10, 10] },
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{ key: 'row_2', position: [10, 50] },
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{ key: 'row_3', position: [10, 90] },
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{ key: 'row_4', position: [10, 130] },
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];
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ctx.font = this.font;
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ctx.textBaseline = 'top';
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layouts.forEach(layout => {
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if (this.monitorData[layout.key]) {
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const item = this.monitorData[layout.key];
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const text = this.formatDisplayText(layout.key, false);
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const color = this.hexToRgb(item['color']);
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ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`;
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ctx.fillText(text, layout.position[0], layout.position[1]);
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}
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});
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}
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}
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// 创建全局监控器实例
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const monitor = new SystemMonitor();
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// 连接按钮点击事件
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connectButton.addEventListener('click', async () => {
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try {
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// 请求用户授权访问串口设备
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port = await navigator.serial.requestPort();
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// 打开串口，设置波特率为 19200（与 Python 脚本一致）
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await port.open({
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baudRate: 19200,
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dataBits: 8,
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stopBits: 1,
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parity: 'none',
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flowControl: 'none'
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});
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// 获取读写器
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const encoder = new TextEncoder();
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const decoder = new TextDecoder('gbk');
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writer = port.writable.getWriter();
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reader = port.readable.getReader();
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// 开始监听串口数据
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listenForData(reader, decoder);
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// 发送连接确认消息
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await sendMessage('MSNCN');
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console.log('MSN设备连接中...');
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// 连接成功后自动开始监控
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setTimeout(() => {
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if (!animationId) {
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console.log('自动开始监控...');
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animationId = requestAnimationFrame(animate);
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}
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}, 200);
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} catch (error) {
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console.error('连接设备时出错:', error);
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}
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});
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// 监听串口数据
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async function listenForData(reader, decoder) {
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try {
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while (true) {
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const { value, done } = await reader.read();
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if (done) {
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// 端口已关闭
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console.log('串口已关闭');
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deviceState = 0;
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break;
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}
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// 处理接收到的数据
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const data = decoder.decode(value);
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console.log('接收到数据:', data);
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// 检测是否为 MSN 设备
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if (data.length > 5) {
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for (let n = 0; n < data.length - 5; n++) {
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if (data.charCodeAt(n) === 0) {
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if (data.substring(n + 1, n + 4) === 'MSN') {
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// 确认是 MSN 设备
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console.log('检测到 MSN 设备');
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deviceState = 1;
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// 检查是否收到连接确认
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if (data.substring(n + 1, n + 6) === 'MSNCN') {
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console.log('MSN 设备连接完成');
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}
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break;
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}
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}
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}
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}
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}
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} catch (error) {
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console.error('读取数据时出错:', error);
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deviceState = 0;
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}
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}
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// 发送消息到设备
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async function sendMessage(message) {
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if (!writer) return;
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try {
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// 构建消息：开头是 0x00，然后是消息内容
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const data = new Uint8Array(message.length + 1);
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data[0] = 0x00; // 开头的 0 字节
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for (let i = 0; i < message.length; i++) {
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data[i + 1] = message.charCodeAt(i);
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}
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await writer.write(data);
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console.log('发送消息:', message);
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} catch (error) {
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console.error('发送消息时出错:', error);
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}
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}
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// 断开连接按钮点击事件
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disconnectButton.addEventListener('click', async () => {
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// 断开连接前自动停止监控
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if (animationId) {
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console.log('自动停止监控...');
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cancelAnimationFrame(animationId);
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animationId = null;
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}
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if (reader) {
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await reader.cancel();
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reader.releaseLock();
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}
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if (writer) {
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await writer.close();
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writer.releaseLock();
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}
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if (port) {
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await port.close();
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port = null;
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}
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deviceState = 0;
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console.log('设备已断开连接');
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});
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// 辅助函数：将32位整数拆分为4个字节
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function digitToInts(di) {
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return [(di >> 24) & 0xFF, (di >> 16) & 0xFF, (di >> 8) & 0xFF, di & 0xFF];
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}
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// RGB888转RGB565格式
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function rgb888ToRgb565(imageData) {
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const rgb565Array = [];
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for (let i = 0; i < imageData.data.length; i += 4) {
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const r = imageData.data[i];
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const g = imageData.data[i + 1];
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const b = imageData.data[i + 2];
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const rgb565 = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);
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rgb565Array.push(rgb565);
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}
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return rgb565Array;
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}
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// 对图像数据进行压缩处理，减少传输数据量
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function ScreenDateProcess(photoData) {
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const totalDataSize = photoData.length;
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const dataPerPage = 128;
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let dataPage1 = 0;
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let dataPage2 = 0;
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const hexUse = [];
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// 按页处理数据
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for (let i = 0; i < Math.floor(totalDataSize / dataPerPage); i++) {
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dataPage1 = dataPage2;
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dataPage2 += dataPerPage;
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const dataW = photoData.slice(dataPage1, dataPage2);
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const cmpUse = [];
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for (let j = 0; j < dataW.length; j += 2) {
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cmpUse.push((dataW[j] << 16) | dataW[j + 1]);
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}
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// 找出最频繁的颜色作为背景色
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const colorCount = {};
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cmpUse.forEach(color => {
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colorCount[color] = (colorCount[color] || 0) + 1;
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});
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let maxCount = 0;
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let backgroundColor = 0;
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for (const [color, count] of Object.entries(colorCount)) {
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if (count > maxCount) {
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maxCount = count;
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backgroundColor = parseInt(color);
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}
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}
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hexUse.push(2, 4);
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hexUse.push(...digitToInts(backgroundColor));
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// 只记录与背景色不同的像素
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cmpUse.forEach((cmpValue, index) => {
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if (cmpValue !== backgroundColor) {
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hexUse.push(4, index);
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hexUse.push(...digitToInts(cmpValue));
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}
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});
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hexUse.push(2, 3, 8, 1, 0, 0);
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}
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// 处理剩余数据
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const remainingDataSize = totalDataSize % dataPerPage;
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if (remainingDataSize !== 0) {
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const dataW = photoData.slice(-remainingDataSize);
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// 补全数据
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while (dataW.length < dataPerPage) {
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dataW.push(0xFFFF);
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}
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const cmpUse = [];
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for (let j = 0; j < dataW.length; j += 2) {
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cmpUse.push((dataW[j] << 16) | dataW[j + 1]);
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}
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cmpUse.forEach((cmpValue, index) => {
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hexUse.push(4, index);
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hexUse.push(...digitToInts(cmpValue));
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});
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hexUse.push(2, 3, 8, 0, remainingDataSize * 2, 0);
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}
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return hexUse;
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}
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// 设置LCD显示起始坐标
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function LCD_Set_XY(lcdD0, lcdD1) {
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const hexUse = [];
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hexUse.push(2); // LCD多次写入命令
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hexUse.push(0); // 设置起始位置指令
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hexUse.push(Math.floor(lcdD0 / 256)); // X坐标高字节
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hexUse.push(lcdD0 % 256); // X坐标低字节
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hexUse.push(Math.floor(lcdD1 / 256)); // Y坐标高字节
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hexUse.push(lcdD1 % 256); // Y坐标低字节
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return hexUse;
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}
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// 设置LCD显示区域大小
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function LCD_Set_Size(lcdD0, lcdD1) {
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const hexUse = [];
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hexUse.push(2); // LCD多次写入命令
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hexUse.push(1); // 设置大小指令
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hexUse.push(Math.floor(lcdD0 / 256)); // 宽度高字节
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hexUse.push(lcdD0 % 256); // 宽度低字节
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hexUse.push(Math.floor(lcdD1 / 256)); // 高度高字节
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hexUse.push(lcdD1 % 256); // 高度低字节
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return hexUse;
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}
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// 设置LCD显示区域并准备写入数据
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async function LCD_ADD(lcdX, lcdY, lcdXSize, lcdYSize) {
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const hexUse = [];
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hexUse.push(...LCD_Set_XY(lcdX, lcdY));
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hexUse.push(...LCD_Set_Size(lcdXSize, lcdYSize));
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hexUse.push(2); // LCD多次写入命令
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hexUse.push(3); // 设置指令
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hexUse.push(7); // 载入地址
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hexUse.push(0, 0, 0);
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await sendData(hexUse);
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}
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// 发送数据到设备
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async function sendData(dataArray) {
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if (!writer) return;
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try {
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const data = new Uint8Array(dataArray);
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await writer.write(data);
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console.log('发送数据:', dataArray.length, '字节');
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} catch (error) {
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console.error('发送数据时出错:', error);
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}
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}
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// 显示系统状态到LCD屏幕
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async function showPCState() {
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// 创建显示图像
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const image = monitor.createDisplayImage();
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// 获取图像数据
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const imageData = ctx.getImageData(0, 0, SHOW_WIDTH, SHOW_HEIGHT);
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// 转换为RGB565格式
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const rgb565 = rgb888ToRgb565(imageData);
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// 压缩数据
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const hexUse = ScreenDateProcess(rgb565);
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// 发送数据到设备
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await sendData(hexUse);
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}
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// 动画循环
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async function animate(timestamp) {
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if (!lastRefreshTime) {
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lastRefreshTime = timestamp;
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}
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const elapsed = timestamp - lastRefreshTime;
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if (elapsed >= refreshInterval) {
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lastRefreshTime = timestamp;
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// 检查设备状态
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if (deviceState === 1) {
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try {
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// 设置显示区域
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await LCD_ADD(0, 0, SHOW_WIDTH, SHOW_HEIGHT);
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// 显示系统状态
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await showPCState();
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} catch (error) {
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console.error('显示系统状态时出错:', error);
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}
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}
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}
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// 继续动画循环
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animationId = requestAnimationFrame(animate);
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}
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// 开始按钮点击事件
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startButton.addEventListener('click', () => {
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if (!animationId) {
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console.log('开始监控...');
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animationId = requestAnimationFrame(animate);
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}
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});
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// 停止按钮点击事件
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stopButton.addEventListener('click', () => {
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if (animationId) {
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console.log('停止监控...');
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cancelAnimationFrame(animationId);
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animationId = null;
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}
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});
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});
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