SerialPort访问接口获取电子称数据

1、using System;using Syste m0 .Ports;using System.Text; |using System.Thread ing; |/ /封装COM 口数据/ public class Coml nformatio n|stri ng _wdata;stri ng _wun it;stri ng _qdata;stri ng _qun it;stri ng _perce ntage;/ /获取或设置重量/ public stri ng WData get retur n this._wdata; set this._wdata = value; / /获取或设置重

2、量单位/ public stri ng WUn it get retur n this._w un it; set this._w unit = value; / /获取或设置数量/ public stri ng QData get retur n this._qdata; set this._qdata = value; / /获取或设置数量单位/ public stri ng QUn it get retur n this._ qun it; set this._ qun it = value; / /获取或设置百分数/ public stri ng Perce ntage get ret

3、ur n this._perce ntage; set this._perce ntage = value; / /电子称数据读取类/ public class WeightReader : IDisposable#region字段、属性与构造函数SerialPort sp;int _speed = 300;/ Ill获取或设置电脑取 COM数据缓冲时间，单位毫秒III public int Speedgetretur n this._speed;setif (value 300)300毫秒!);throw new Exception(”串口读取缓冲时间不能小于 this._speed = v

4、alue;public bool In itCom(stri ng PortName)return this.I ni tCom(PortName, 4800, 300);/ /初始化串口/ / 数据传输端口 / 波特率 / 串口读数缓冲时间 / public bool In itCom(stri ng PortName, int BaudRate,i nt Speed)trysp = new SerialPort(PortName, BaudRate, Parity.No ne, 8); sp.ReceivedBytesThreshold = 10;sp.Ha ndshake = Han d

5、shake.RequestToSe nd;sp.Parity = Parity.N one;sp.ReadTimeout = 600;sp.WriteTimeout = 600;this.Speed = Speed;if (!sp.lsOpe n)sp.Ope n();return true; catch throw new Exception(string.Format(” 无法初始化串口 0!,PortName);#en dregi on#region串口数据读取方法public Weight In formati on ReadI nfo()stri ng src = this.Read

6、Com();Weight In formati on info = new WeightI nformatio n();in fo.WData = this.DecodeWeightData(src);info.WUn it = this.DecodeWeight Un it(src);in fo.Perce ntage = this.DecodePerce ntage(src);in fo.QData = this.DecodeQualityData(src);in fo.QU nit = this.DecodeQuality Un it(src); return info;/ /将COM

7、口缓存数据全部读取/ / private string ReadCom()/ 返回信息if (this.sp .I sOpe n)Thread.Sleep(this._speed);stri ng res =;/for (int i = 0; i 5; i+)/byte buffer = new bytesp.BytesToRead;sp.Read(buffer, 0, buffer.Le ngth);res = System.Text.E ncodi ng.ASCII.GetStri ng(buffer);/if (res !=)/ break;/if (res =)throw new Ex

8、ception(”串口读取数据为空，参数设置是否正确r);return res;return ;#en dregi on#region 基本取数方法/ III从字符串中取值/ III 起始字符串 / 间隔位长度 / 值长度 / 源字符串 / private stri ng DecodeValue(stri ng head, int in tervalLe n, int valueLe n, stri ng src) int in dex = srcn dexOf(head);retur n src.Substri ng(i ndex + in tervalLe n, valueLe n);/

9、/取重量/ / 源字符串 / private stri ng DecodeWeightData(stri ng srcStri ng)return this.DecodeValue(GS, 3, 8,srcStri ng);/ /取重量单位/ / 源字符串 / private stri ng DecodeWeight Un it(stri ng srcStri ng)return this.DecodeValue(GS, 12, 2, srcStri ng);/ /取百分数/ / 源字符串 / private stri ng DecodePerce ntage(stri ng srcStri ng)return this.DecodeValue(U.W., 4, 14, srcStri ng);/ /取数量/ / vparam name=srcString 源字符串 / vretur nsprivate stri ng DecodeQualityData(stri ng srcStri ng)return this.DecodeValue(PCS, 3, 9, srcStri ng);/ /取数量单位/ / 源字符串 / private stri ng DecodeQuality Un it(stri ng s