PORTS Forum
Ports and Interfaces => Serial Ports => Topic started by: GlennP on December 18, 2012, 07:03:33 am
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Hi All,
In my current quest to emmulate a PSION Workabout I have discovered several oddity's the first is that using my standard method
if (InputData != String.Empty)
{
this.BeginInvoke(new SetTextCallback(SetText), new object[] { InputData });
ProcessInput();
}
I have been advised that the following:
"The BeginInvoke() method is executed when a connection occurs. In a serial port there isn't yo udon't get a start of a connection unless some control lines are beig used. I would eliminate the BeginInvoke() method." I have used this method many times with out trouble or problems so I retreated to Serial Port Complete and tried to use the Marshalling method to see if that would produce any better results (pages 195 to 197) this gives an error. I have had a look at the example code but can't see where the Access Marshalling is taking place, beside, the example will not get a responce from the board. This is being tricky, really tricky.
Any ideas, any one?
Glenn
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Serial Ports don't have connections like TCP/IP. You don't need to use flow control with BeginInvoke.
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Thats what I thought ! Once the port is open you are good to go! I am still having this issue where I can see data coming back on a spy window but can't get it to my Form. I have experimented with trying to use a marshal to get the data to the form. Could I be having a thread race (as was suggested else-where MSDN) as Using a spy the data comes back but is not processed by the program
would using a Martial to Access the form be an idea? In the C# Serial Port class programs I have written I have not had to use one. ???