[Tutor] Serial Com Question (How to detect non-response)

Vicki Stanfield vicki at thepenguin.org
Mon Sep 22 16:30:35 EDT 2003


> If your device provides hardware handshaking signals,
> and if your cable is carrying them across to your computer,
> and if serial supports examining the signals
> then you can check DataSetReady (DSR) which would be pin 6 on a 25 pin
> connector.
> DSR indicates that it is powered on and in a ready state as opposed to a
> a test or stand-by state (or off).
>
> Your computer would normally be a DTE serial pinout.  Your device is
> a DCE pinout if works with a "regular" modem cable.
>
> ClearToSend (CTS) could be used to indicate that the device is ready for
> your
> program to send data.
>

I looked in the serial module and didn't see a ClearToSend. I loaded the
module and did a dir on it. Is there somewhere else I should be looking?

--vicki



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