Thread.Sleep(100);
int receiveData = serialPort1.BytesToRead; //读取缓存区字节数目
textBox15.Text = Convert.ToString(receiveData);//数据长度为40
DateTime ReadStartTime = DateTime.Now;
byte[] rdata=new byte[serialPort1.BytesToRead];这里数据长度为0,并且没有数据内容
//try
//{
serialPort1.Read(rdata, 0, rdata.Length);
//}
// catch
//{
// MessageBox.Show("读取数据失败,请检查串口号", "失误");
//}
int q = 0;
q = serialPort1.BytesToRead;
textBox15.Text=textBox15.ToString() + " "+q;//数据长度为0
int i=0;
//for (i = 0; i < serialPort1.BytesToRead; )
//{
foreach (byte member in rdata)
{
Readbuff[i] = (byte)member;
i++;
// }
}
Thread.Sleep(10);
serialPort1.DiscardInBuffer();
serialPort1.DiscardOutBuffer();
analysisdata();
Thread.Sleep(10);
使用的是Visual studio的Framework4.7版,数据判断接收的第一次长度为40,后面数据长度突然变为0,而且没有数据内容。这可能与什么有关?