Serial Port hanging up

[Dan Symonds]

I am writting an application that requires two computers to
communicate over the serial port.

I have two connected problems:
1 Any data left in the buffer for over 1 sec appears to be
discarded or hangs up the port even though I have the error
checking disabled.
2 The LOC or EOF funtions don't indicate any data in the buffer
so I have no way of determining if the port is hung.

Is there a another test to see if the port is active or if data is
in the buffer. Other than "closing" and "opening" the port, is
there another way to reset the port.

Thanks
Dan Symonds

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[Mel Bishop]

Questions:

Are you using the program in a DOS box? If so, try booting
without the windows GUI and see what happens.

Are you using Xon/Xoff or hardware handshaking? You may have a
flow control problem.

Try checking these out and if that doesn't solve the problem,
post a code snippet so we can see how you are structuring your
routine.


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[Tom Hanlin]

Mel's points are excellent. Do follow through.

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Tom Hanlin
PowerBASIC Staff