Serial Port Complete - Latest Microcontroller projects

Chapter 10

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The DataReceived event provides an efficient way to detect received data. To

use the event, create a delegate for a routine that will execute when a DataRe-

ceived event occurs on an open port.

 ' Define a delegate class to handle DataReceived events.

Friend Delegate Sub SerialDataReceivedEventHandlerDelegate _

(ByVal sender As Object, ByVal e As SerialDataReceivedEventArgs)

' Create an instance of the delegate.

Private SerialDataReceivedEventHandler1 _

As New SerialDataReceivedEventHandler(AddressOf DataReceived)

 // Define a delegate class to handle DataReceived events.

internal delegate void SerialDataReceivedEventHandlerDelegate

(object sender, SerialDataReceivedEventArgs e);

// Create an instance of the delegate.

private static SerialDataReceivedEventHandler SerialDataReceivedEventHandler1 =

new SerialDataReceivedEventHandler( ComPort.DataReceived );

Assign the delegate as the handler routine to execute when a DataReceived

event occurs on a port:

 AddHandler myComPort.DataReceived, SerialDataReceivedEventHandler1

 myComPort.DataReceived += SerialDataReceivedEventHandler1;

The DataReceived routine can then read and process received data as needed.

 Friend Sub DataReceived _
(ByVal sender As Object, ByVal e As SerialDataReceivedEventArgs)

' Place code to read and process data here.

End Sub