254 lines
6.8 KiB
JavaScript
254 lines
6.8 KiB
JavaScript
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var cmd1 = "FE FE FE 7C 00 09 01 ff ff 00 00 00 00 ** ** 16";
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var cmd2 = "FE FE FE 7C 00 09 02 00 FF 00 01 00 00 ** ** 16";
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var cmd3 = "FE FE FE 7C 00 18 03 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 00 00 00 00 ** ** 16";
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var cmd4 = "FE FE FE 7C 00 09 04 00 FF 00 01 00 00 ** ** 16";
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var startWith = "FE FE FE 7C";
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function getCmd(msg){
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var mingling = msg.type;
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var sendMsg = '';
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switch(mingling) {
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case '01':
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console.log("开始请求第一条通信协议");
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sendMsg = getSendMsg(mingling,"ff ff"," 00 00 00 00");
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break;
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case '02':
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console.log("开始请求第二条通信协议");
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sendMsg = getSendMsg(mingling,"00 ff 00 01"," 00 00 00 00");
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break;
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case '03':
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console.log("开始请求第三条通信协议");
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sendMsg = getSendMsg(mingling,msg.sbid);
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break;
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case '04':
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console.log("开始请求第四条通信协议");
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sendMsg = getSendMsg(mingling,msg.sbid);
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break;
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default:
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}
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console.log(sendMsg);
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}
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/**
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* 数字转16进制码
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* @param {*} num
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*/
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function toHex16(num){
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console.log("dayin"+num)
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var hex = num.toString(16).toUpperCase();
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var length = hex.length;
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switch(length){
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case 1:
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hex = "00 "+"0"+hex;
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break;
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case 2:
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hex = "00 "+hex;
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break;
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case 3:
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hex = "0 "+hex;
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hex = hex.substring(0, 2) + hex.substring(2, 4);
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break;
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case 4:
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hex = hex.substring(0, 2) +" "+ hex.substring(2, 4);
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break;
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default:
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break;
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}
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console.log(hex);
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return hex;
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}
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/**
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* 检查是否是Hex
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* @param {*} dataStr
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*/
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function checkHexStr(dataStr) {
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dataStr = dataStr.replace(/\s/g, "");
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if (dataStr.length % 2 != 0) {
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return "";
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}
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if (/[0-9A-Fa-f]/g.test(dataStr)) {
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return dataStr;
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}
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return "";
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}
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/**
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* 组装发送数据
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* @param {*} mingling
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* @param {*} sbid
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*/
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function getSendMsg(mingling,sbid,mess){
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var cmd = mingling+" "+sbid+mess;
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var length = toHex16(cmd.split(" ").length);
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cmd = length +" "+cmd;
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var crc = CRC.ToModbusCRC16(cmd,false);
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cmd = startWith+" "+cmd+" "+crc.substring(0, 2) +" "+ crc.substring(2, 4)+" 16";
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return cmd;
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}
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function bin_to_hex(str) {
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let hex_array = [{key:0,val:"0000"},{key:1,val:"0001"},{key:2,val:"0010"},{key:3,val:"0011"},{key:4,val:"0100"},{key:5,val:"0101"},{key:6,val:"0110"},{key:7,val:"0111"},
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{key:8,val:"1000"},{key:9,val:"1001"},{key:'a',val:"1010"},{key:'b',val:"1011"},{key:'c',val:"1100"},{key:'d',val:"1101"},{key:'e',val:"1110"},{key:'f',val:"1111"}]
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let value = '';
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let list=[];
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if(str.length%4!==0){
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let a = "0000"
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let b=a.substring(0,4-str.length%4)
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str = b.concat(str)
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}
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while (str.length > 4) {
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list.push(str.substring(0, 4))
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str = str.substring(4);
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}
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list.push(str);
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for(let i=0;i<list.length;i++){
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for(let j=0;j<hex_array.length;j++){
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if(list[i]==hex_array[j].val){
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value = value.concat(hex_array[j].key)
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break
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}
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}
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}
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return value;
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}
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//ASCII码转16进制
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function strToHexCharCode(str) {
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if (str === "") {
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return "";
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} else {
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var hexCharCode = [];
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hexCharCode.push("0x");
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for (var i = 0; i < str.length; i++) {
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hexCharCode.push((str.charCodeAt(i)).toString(16));
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}
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return hexCharCode.join("");
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}
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}
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//十六进制转ASCII码
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function hexCharCodeToStr(hexCharCodeStr) {
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var trimedStr = hexCharCodeStr.trim();
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var rawStr = trimedStr.substr(0, 2).toLowerCase() === "0x" ? trimedStr.substr(2) : trimedStr;
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var len = rawStr.length;
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if (len % 2 !== 0) {
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alert("存在非法字符!");
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return "";
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}
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var curCharCode;
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var resultStr = [];
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for (var i = 0; i < len; i = i + 2) {
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curCharCode = parseInt(rawStr.substr(i, 2), 16);
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resultStr.push(String.fromCharCode(curCharCode));
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}
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return resultStr.join("");
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}
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var CRC = {};
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CRC.CRC16 = function (data) {
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var len = data.length;
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if (len > 0) {
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var crc = 0xFFFF;
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for (var i = 0; i < len; i++) {
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crc = (crc ^ (data[i]));
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for (var j = 0; j < 8; j++) {
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crc = (crc & 1) != 0 ? ((crc >> 1) ^ 0xA001) : (crc >> 1);
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}
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}
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var hi = ((crc & 0xFF00) >> 8); //高位置
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var lo = (crc & 0x00FF); //低位置
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return [hi, lo];
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}
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return [0, 0];
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};
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CRC.isArray = function (arr) {
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return Object.prototype.toString.call(arr) === '[object Array]';
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};
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CRC.ToCRC16 = function (str, isReverse) {
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return CRC.toString(CRC.CRC16(CRC.isArray(str) ? str : CRC.strToByte(str)), isReverse);
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};
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CRC.ToModbusCRC16 = function (str, isReverse) {
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return CRC.toString(CRC.CRC16(CRC.isArray(str) ? str : CRC.strToHex(str)), isReverse);
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};
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CRC.strToByte = function (str) {
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var tmp = str.split(''), arr = [];
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for (var i = 0, c = tmp.length; i < c; i++) {
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var j = encodeURI(tmp[i]);
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if (j.length == 1) {
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arr.push(j.charCodeAt());
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} else {
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var b = j.split('%');
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for (var m = 1; m < b.length; m++) {
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arr.push(parseInt('0x' + b[m]));
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}
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}
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}
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return arr;
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};
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CRC.convertChinese = function (str) {
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var tmp = str.split(''), arr = [];
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for (var i = 0, c = tmp.length; i < c; i++) {
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var s = tmp[i].charCodeAt();
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if (s <= 0 || s >= 127) {
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arr.push(s.toString(16));
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}
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else {
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arr.push(tmp[i]);
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}
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}
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return arr;
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};
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CRC.filterChinese = function (str) {
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var tmp = str.split(''), arr = [];
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for (var i = 0, c = tmp.length; i < c; i++) {
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var s = tmp[i].charCodeAt();
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if (s > 0 && s < 127) {
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arr.push(tmp[i]);
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}
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}
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return arr;
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};
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CRC.strToHex = function (hex, isFilterChinese) {
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hex = isFilterChinese ? CRC.filterChinese(hex).join('') : CRC.convertChinese(hex).join('');
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//清除所有空格
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hex = hex.replace(/\s/g, "");
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//若字符个数为奇数，补一个0
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hex += hex.length % 2 != 0 ? "0" : "";
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var c = hex.length / 2, arr = [];
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for (var i = 0; i < c; i++) {
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arr.push(parseInt(hex.substr(i * 2, 2), 16));
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}
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return arr;
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};
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CRC.padLeft = function (s, w, pc) {
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if (pc == undefined) {
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pc = '0';
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}
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for (var i = 0, c = w - s.length; i < c; i++) {
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s = pc + s;
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}
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return s;
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};
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CRC.toString = function (arr, isReverse) {
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if (typeof isReverse == 'undefined') {
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isReverse = true;
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}
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var hi = arr[0], lo = arr[1];
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return CRC.padLeft((isReverse ? hi + lo * 0x100 : hi * 0x100 + lo).toString(16).toUpperCase(), 4, '0');
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};
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