R: Reading From Serial Port

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#17104

From: Steve
Date: Wed, 09 Apr 2003 11:47

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> I am able to write out data to the serial port which has a
twisted cable
> attached. However, I am unable to read any data in...

Maybe I haven't understood correctly your problem, but
there's something strange in your code. What is the problem
exactly? How can you say you don't receive any data?

Have you tried the following values instead of yours?

SerialPort.CommTimeOuts.ReadIntervalTimeout = MAXWORD;
SerialPort.CommTimeOuts.ReadTotalTimeoutMultiplier = 0;
SerialPort.CommTimeOuts.ReadTotalTimeoutConstant = 0;
SerialPort.CommTimeOuts.WriteTotalTimeoutMultiplier = 0;
SerialPort.CommTimeOuts.WriteTotalTimeoutConstant = 0;

>
inread=ReadFile(SerialPort.hComm,outbuffer,1,&dwBytesRead,NU
LL);

If I'm not wrong outbuffer is not allocated. Are you sure
this line is correct? Have you tried to define outbuffer as
"char outbuffer[2]" (the same for inbuffer, as well)?

HTH,

Steve.

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Subject: R: Reading From Serial Port
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