public void OpenSp(string cmName, string brulate)
{
try
{
if (Sp.IsOpen)
{
Sp.Close();
Sp.BaudRate = int.Parse(brulate);
Sp.PortName = cmName;
Sp.DataBits = 8;
Sp.Parity = System.IO.Ports.Parity.None;
Sp.StopBits = System.IO.Ports.StopBits.One;
Sp.WriteTimeout = 50;
Sp.ReadBufferSize = 2048;
Sp.WriteBufferSize = 2048;
Sp.Open();
MessageBox.Show("串口打开成功，端口号：" + cmName + " 波特率：" + brulate);
}
else
{
Sp.BaudRate = int.Parse(brulate);
Sp.PortName = cmName;
Sp.DataBits = 8;
Sp.Parity = System.IO.Ports.Parity.None;
Sp.StopBits = System.IO.Ports.StopBits.One;
Sp.WriteTimeout = 50;
Sp.ReadBufferSize = 2048;
Sp.WriteBufferSize = 2048;
Sp.Open();
MessageBox.Show("串口打开成功，端口号：" + cmName + " 波特率：" + brulate);
}
}
catch (Exception ex)
{
MessageBox.Show("串口打开失败" + ex.Message);
}
}