C# 串口写字节
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C# Serial Port Write Byte
提问by DogEatDog
Writing a single byte to the serial port in .NET 4.0 in C# causes a
在 C# 中将单个字节写入 .NET 4.0 中的串行端口会导致
InvalidOperationException was unhandled by user code
用户代码未处理 InvalidOperationException
Every time a byte is sent to the SerialPort.
每次向 SerialPort 发送一个字节。
How do I write a single byte to the serial port?
如何将单个字节写入串行端口？
//Serial Init
//Full fledged constuctor
public NetCommManager(String portName, TransmissionType trans, String baud, String parity, String stopBits, String dataBits)
{
nc_baudRate = baud;
nc_parity = parity;
nc_stopBits = stopBits;
nc_dataBits = dataBits;
nc_portName = portName;
nc_transType = trans;
//now add an event handler
comPort.DataReceived += new SerialDataReceivedEventHandler(netComm_DataReceived);
}
Config:
配置：
_commManger = new NetCommManager(commPortNumber,
NetCommManager.TransmissionType.Text, "19200", "None", "One", "8");
The Byte to be written:
要写入的字节：
_commManager.WriteByte(Convert.ToByte( 0x7B));
And WriteBytefunction is:
而WriteByte函数为：
public void WriteByte(byte data)
{
//change data to array
//byte[] dataArray = new byte[1];
var dataArray = new byte[] {data};
//dataArray[0] = data;
comPort.Write(dataArray, 0, 1); // <-- Exception is thrown here
}
The NetCommManager class is very much based on this example
NetCommManager 类很大程度上基于此示例
采纳答案by Jeff E
You forgot to Open()the comPort: http://msdn.microsoft.com/en-us/library/ms143551.aspx
你忘Open()了comPort：http: //msdn.microsoft.com/en-us/library/ms143551.aspx
