Why is Thread.Sleep () before SerialPort.Open and Close?

Question

I notice code examples that I read after closing and opening SerialPort, where people added Thread.Sleep (1000) to SerialPort.Open () and Close (). As below:

Thread.Sleep(1000);
serialPort1.Open();
/* some code */
Thread.Sleep(1000);
serialPort1.Close();

I can’t find anything. Why do people block the serial port using Thread.Sleep before it gets Open or Close? Is this for some temporary purpose? Should I put Thread.Sleep whenever I read or write to the Serial Port?

Answer 1

, SerialPort , ( WaitCommEvent Windows API) (, ) , , DataReceived, .

, Close() , .

Close, , SerialPort , .

MSDN SerialPort.Close:

Close Open , .

, , , , - -.

/, :

• ,
• DataReady
• ReadTimeout

, SerialPort .NET BCL - API Win32, , Microsoft .

.

• http://www.innovatic.dk/knowledg/SerialCOM/SerialCOM.htm#SerialPortEvents

• http://social.msdn.microsoft.com/Forums/en/netfxbcl/thread/f334ecce-eca3-46fd-8b65-27c02a1d4fea#10dae30d-bc75-49bb-a669-79399e58e1cc

• SerialPort Dispose

Answer 2

SerialPort . Close, Open, .

.

Answer 3

Serial I/O #, , . ( , )

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