public static void Main()
{
string name
string message
StringComparer stringComparer = StringComparer.OrdinalIgnoreCase
Thread readThread = new Thread(Read)
// Create a new SerialPort object with default settings.
_serialPort = new SerialPort()
// Allow the user to set the appropriate properties.
_serialPort.PortName = SetPortName(_serialPort.PortName)
_serialPort.BaudRate = SetPortBaudRate(_serialPort.BaudRate)
_serialPort.Parity = SetPortParity(_serialPort.Parity)
_serialPort.DataBits = SetPortDataBits(_serialPort.DataBits)
_serialPort.StopBits = SetPortStopBits(_serialPort.StopBits)
_serialPort.Handshake = SetPortHandshake(_serialPort.Handshake)
// Set the read/write timeouts
_serialPort.ReadTimeout = 500
_serialPort.WriteTimeout = 500
_serialPort.Open()
_continue = true
readThread.Start()
Console.Write("Name: ")
name = Console.ReadLine()
Console.WriteLine("Type QUIT to exit")
while (_continue)
{
message = Console.ReadLine()
if (stringComparer.Equals("quit", message))
{
_continue = false
}
else
{
_serialPort.WriteLine(
String.Format("<{0}>: {1}", name, message) )
}
}
readThread.Join()
_serialPort.Close()
}
public static void Read()
{
while (_continue)
{
try
{
string message = _serialPort.ReadLine()
Console.WriteLine(message)
}
catch (TimeoutException) { }
}
}
在使用串口接收数据时,当数据量大的时候会出现数据接收不完整的情况。因为串口数据获取函数readAll()由readyRead()信号触发,但readyRead()信号在串口读到起始标志时立即发送,并不保证一定是当前所发数据的起始部分。因此串口通信双方在通信前应制定好通信协议,规定好数据的起始和结束标志,串口当读到完整的起始和结束标志之后,才认定读完一条完整的数据。
本例中用串口定时发送当前时间,用"#"表示数据的结尾,定时时间为0毫秒,即能发多快就发多快。
//发送
[cpp] view plain copy
void Widget::slotSendData()
{
QByteArray temp
temp.append(getCurrentTime())
temp.append("#")
serialPort->write(temp)
}
//接收[cpp] view plain copy
void Widget::slotReadData()
{
QByteArray temp = serialPort->readAll()
if(!temp.isEmpty())
{
byteArray.append(temp)
if(byteArray.contains("#"))
{
ui->textEditReceive->setText(byteArray.split('#').at(0))
byteArray = byteArray.right(byteArray.length()-byteArray.indexOf('#')-1)
}
}
}
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