SerialPort访问接口获取电子称数据
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using System;
using System.IO.Ports;
using System.Text;
using System.Threading;
///
/// 封装COM口数据
///
public class ComInformation
{
string _wdata;
string _wunit;
string _qdata;
string _qunit;
string _percentage;
///
/// 获取或设置重量
///
public string WData { get { return this._wdata; } set { this._wdata = value; } }
///
/// 获取或设置重量单位
///
public string WUnit { get { return this._wunit; } set { this._wunit = value; } }
///
/// 获取或设置数量
///
public string QData { get { return this._qdata; } set { this._qdata = value; } }
///
/// 获取或设置数量单位
///
public string QUnit { get { return this._qunit; } set { this._qunit = value; } }
///
/// 获取或设置百分数
///
public string Percentage { get { return this._percentage; } set { this._percentage =
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;
///
/// 获取或设置电脑取COM数据缓冲时间，单位毫秒
///
public int Speed
{
get
{
return this._speed;
}
set
{
if (value < 300)
throw new Exception("串口读取缓冲时间不能小于300毫秒!");
this._speed = value;
}
}
public bool InitCom(string PortName)
{
return this.InitCom(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 InitCom(string PortName, int BaudRate,int Speed)
{
try
{
sp = new SerialPort(PortName, BaudRate, Parity.None, 8);
sp.ReceivedBytesThreshold = 10;
sp.Handshake = Handshake.RequestToSend;
sp.Parity = Parity.None;
sp.ReadTimeout = 600;
sp.WriteTimeout = 600;
this.Speed = Speed;
if (!sp.IsOpen)
{
sp.Open();
}
return true;
}
catch
{
throw new Exception(string.Format("无法初始化串口{0}!",PortName));
}
}
#endregion
#region 串口数据读取方法
public WeightInformation ReadInfo()
{
string src = this.ReadCom();
WeightInformation info = new WeightInformation();
info.WData = this.DecodeWeightData(src);
info.WUnit = this.DecodeWeightUnit(src);
info.Percentage = this.DecodePercentage(src);
info.QData = this.DecodeQualityData(src);
info.QUnit = this.DecodeQualityUnit(src);
return info;
}
///
/// 将COM口缓存数据全部读取
///
///
private string ReadCom()//返回信息
{
if (this.sp.IsOpen)
{
Thread.Sleep(this._speed);
string res = "";
//for (int i = 0; i < 5; i++)
//{
byte[] buffer = new byte[sp.BytesToRead];
sp.Read(buffer, 0, buffer.Length);
res = System.Text.Encoding.ASCII.GetString(buffer);
//if (res != "")
// break;
//}
if (res == "")
{
throw new Exception("串口读取数据为空，参数设置是否正确!");
}
return res;
}
return "";
}
#endregion