js脚本示例

1. 解析通讯协议并绘制曲线

					(function main() {
						var str = receive.getString(); // 读取接收到的字符串
						receive.write(str); 		   // 输出到接收窗口
						receive.write(" -> ", "red");  // 输出箭头
						
						var buf = util.hexStringToBytes(str); 	   // 将接收到的十六进制字符串转换为数组。
						var val1 = util.bytesToInteger(buf, 7, 2); // val1 按索引和长度将数组转为整数
						var val2 = util.bytesToInteger(buf, 9, 2); // val2
						receive.write('val1=' + val1 + " ", "LawnGreen"); //输出转换后的数值
						receive.write('val2=' + val2, "yellow");
						receive.write("\r\n"); //Print line breaks for easy observation.
						
						chart.write("val1=" + val1 + "\n"); // 绘制到波形界面。 名字是val1
						chart.write("val2=" + val2 + "\n"); // 绘制到波形界面。 名字是val2
					})();
js to chart

2. 获取时间字符串

					// Format  10:48:59.671  h:m:s.ms
					function timeToString() {
						let d = new Date();
						let h = d.getHours().toString().padStart(2, '0');
						let m = d.getMinutes().toString().padStart(2, '0');
						let s = d.getSeconds().toString().padStart(2, '0');
						let ms = d.getMilliseconds().toString().padStart(3, '0');
						return h + ":" + m + ":" + s + "." + ms;
					}

3. 十六进制字符串转位十进制

                    /********************************
                    *
                    * Notes: 十六进制字符串转换为十进制
                    *
                    *
                    *
                    *
                    *******************************/
                    
                    {
                        let str = receive.getString();       //读取接收到的字符串
                        receive.write(str);                  //输出到接收窗口
                        receive.write(" -> ", "DarkOrange"); //输出箭头
                        
                        let buf = util.hexStringToBytes(str);     //转为字节数组
                        let val = util.bytesToInteger(buf, 0, 2); // 转为 int16;
                        
                        console.log(val); //打印到输出窗口
                        receive.write(val.toString(), "DarkOrange"); //输出转换后的数值
                    }

4. 整数转为字符串 

                        val = 10;
                        let str1 = val.toString();   //转十进制字符串 '10'
                        let str2 = val.toString(16); //转十六进制字符串 'a'
                        let str3 = val.toString(8);  //转八进制字符串 '12'
                        let str4 = val.toString(2);  //转二进制字符串 '1010'
                        let str5 = val.toString(2).padStart(8, '0'); //转二进制字符串不足8位填充0 '00001010'

5. 打印函数源码 

                    (function main() {
                        console.dir(util.bytesToInteger);
                    })();
print code