Some Spells about IrDa and Tiny Devices + Embedded Visual Basic 3.0 code!
Some Spells and tips on how Develop Good Program for IrDa devices and solve some annoing connection problems between IrDa devices. A rush of code written in embedded visual basic 3.0 (Windows CE 3.0), explain the facts. See also my article on Generic IrDa systems! here: http://www.planetsourcecode.com/vb/scripts/ShowCode.asp?txtCodeId=4725&lngWId=3 PLEASE DOWNLAD THE ZIP BECAUSE PLANET SOURCE CODE DOES NOT DISPLAY CORRECTLY THE HTML!
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<title>Some Spells on: IrDa (Infrared) devices programming</title>
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<p>Some Spells on: "IrDa (Infrared) devices programming"<br>
whit code snippet written in: <br>
Embedded Visual Basic 3.0 (Windows Ce 3.0)<br>
(C) 2002 Berardi Michele<br>
http://web.tiscali.it/mberardi <br>
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The infrared devices are joined to the BCR (a serial device).<br>
<br>
The BCR cannot send off messages to the irda peripherals<br>
about its speed of communication, therefore is necessary<br>
to set up and initialize on both irda peripherals,<br>
the same speed of communication.<br>
<br>
The values of default of habit they are: 9600, N,8,1.<br>
<br>
The device Irda need for running 12 milliampere<br>
power suppyed from the BCR, either from a battery or<br>
external power supply.<br>
<br>
The connection means habit throught a serial connector<br>
9 pin female, which takes the power<br>
from the handshaking's pin.<br>
<br>
To make one's will the communication Irda using a<br>
Desktop PC provided of an Irda Eye.<br>
You can use a simple terminal emulator<br>
on the desktop setting the same parameters<br>
as the pocket pc device ( 9600,N,8,1 ) <br>
and obvious choosing the serial port<br>
assigned to Irda device (the port must be<br>
correctly installed on system).<br>
<br>
If it is wanted writeran applications for the IrDa com,<br>
you are remembered to settings highs (true for the VB)<br>
the values DTR and RTS in the property of the object COM,<br>
otherwise the communication cannot happen<br>
for scarcity of energy,<br>
besides for the object COM in matter is necessary set up<br>
the propertyes:<br>
<br>
Rthreshold = 1 and Strheshold = 0.<br>
<br>
Example of evb code:
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' how to create a com object and how it (described above)<br>
' assign a generic Irda port (as usual COM4)<br>
'<br>
<br>
Option Explicit<br>
<br>
Private Sub Receive(data)<br>
txtReceived.SelStart = Len (txtReceived.Text)<br>
txtReceived.SelText = data<br>
End Sub<br>
<br>
Private Sub InviaTesto_Click ()<br>
Comm1.Output = txtReceived.Text<br>
End Sub<br>
<br>
Private Sub Comm1_OnComm ()<br>
If Comm1.CommEvent = 2 Then Call Receive(Comm1.Input)<br>
End Sub<br>
<br>
Private Sub Form_Load ()<br>
If Not Comm1.PortOpen Then Comm1.PortOpen = True<br>
End Sub<br>
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<br>
<br>
Berardi Michele<br>
Senior Developer<br>
"customize your opportunities!"<br>
Mobile: + 39 347 319 2000<br>
E-Mail(S) :<br>
mfxaub@tin.it<br>
03473192000@vizzavi. it<br>
Web:<br>
http://web.tiscalinet.it/mberardi<br>
<br>
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Original Comments (3)
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