腳踏編程及接線方法

首先講接線，要觸發CTS等引腳的事件，必須對CTS等引腳施加一個高電平。高電平的來源可以來自第四腳，同時必須在軟件中對第四腳置高電平。

C#部分代碼如下

mSP.PortName = "COM1";
mSP.BaudRate = 9600;
mSP.DtrEnable = true;    //這里是對DTR置高電平
mSP.RtsEnable = true;    //這里是對RTS置高電平
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++;
//引腳    簡寫      功能說明
//1       CD        載波偵測（Carrier Detect）
//2       RXD       接收數據（Receive）
//3       TXD       發送數據（Transmit）
//4       DTR       數據終端準備（Data Terminal Ready）
//5       GND       地線（Ground）
//6       DSR       數據準備好（Data Set Ready）
//7       RTS       請求發送（Request To Send）
//8       CTS       清除發送（Clear To Send）
//9       RI        振鈴指示（Ring Indicator）
if (e.EventType == System.IO.Ports.SerialPinChange.CtsChanged)          //引腳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)      //引腳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)     //引腳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)           //引腳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)          //引腳
{
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");
}
}