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脚踏编程及接线方法

首先讲接线,要触发CTS等引脚的事件,必须对CTS等引脚施加一个高电平。高电平的来源可以来自第四脚,同时必须在软件中对第四脚置高电平。

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C#部分代码如下

 

mSP.PortName = "COM1";
mSP.BaudRate = 9600;
mSP.DtrEnable = true;    //这里是对DTR置高电平
mSP.RtsEnable = true;    //这里是对RTS置高电平
mSP.Open();
mSP.PinChanged += mSP_PinChanged;
int mSPPinCount = 0;
StringBuilder mSB = new StringBuilder();
System.DateTime mDTPinLast = System.DateTime.Now;
void mSP_PinChanged(object sender, System.IO.Ports.SerialPinChangedEventArgs e)
{
if (((System.TimeSpan)(System.DateTime.Now - mDTPinLast)).TotalMilliseconds < HealthyExamination.Common.BaseC.GlobeValues.LocalParas.CaptureSerialPortPinDelayMS)
{
return;
}
mDTPinLast = System.DateTime.Now;
mSPPinCount++;
//引脚    简写      功能说明
//1       CD        载波侦测(Carrier Detect)
//2       RXD       接收数据(Receive)
//3       TXD       发送数据(Transmit)
//4       DTR       数据终端准备(Data Terminal Ready)
//5       GND       地线(Ground)
//6       DSR       数据准备好(Data Set Ready)
//7       RTS       请求发送(Request To Send)
//8       CTS       清除发送(Clear To Send)
//9       RI        振铃指示(Ring Indicator)
if (e.EventType == System.IO.Ports.SerialPinChange.CtsChanged)          //引脚8
{
mSB.Insert(0, System.DateTime.Now.ToString("mm:ss:ffff") + "\t" + "CtsChanged mSPPinCount=" + mSPPinCount.ToString() + "\r\n");
}
else if (e.EventType == System.IO.Ports.SerialPinChange.CDChanged)      //引脚1?
{
mSB.Insert(0, System.DateTime.Now.ToString("mm:ss:ffff") + "\t" + "CDChanged mSPPinCount=" + mSPPinCount.ToString() + "\r\n");
}
else if (e.EventType == System.IO.Ports.SerialPinChange.DsrChanged)     //引脚6
{
mSB.Insert(0, System.DateTime.Now.ToString("mm:ss:ffff") + "\t" + "DsrChanged mSPPinCount=" + mSPPinCount.ToString() + "\r\n");
}
else if (e.EventType == System.IO.Ports.SerialPinChange.Ring)           //引脚9
{
mSB.Insert(0, System.DateTime.Now.ToString("mm:ss:ffff") + "\t" + "Ring mSPPinCount=" + mSPPinCount.ToString() + "\r\n");
}
else if (e.EventType == System.IO.Ports.SerialPinChange.Break)          //引脚
{
mSB.Insert(0, System.DateTime.Now.ToString("mm:ss:ffff") + "\t" + "Break mSPPinCount=" + mSPPinCount.ToString() + "\r\n");
}
else
{
mSB.Insert(0, System.DateTime.Now.ToString("mm:ss:ffff") + "\t" + "Others mSPPinCount=" + mSPPinCount.ToString() + "\r\n");
}
}

 

 


文章标题:脚踏编程及接线方法
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