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Getting the state of a serial ports CTS pin

Posted on 2004-04-03
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Last Modified: 2013-12-03
Hi,
After using WaitCommEvent to get a EV_CTS event, how can I retrieve the 'actual' state of the cts input pin?

Thanks
dsch
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Question by:dsch
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mokule earned 250 total points
ID: 10749904
The GetCommModemStatus function retrieves modem control-register values.


BOOL GetCommModemStatus(
  HANDLE hFile,
  LPDWORD lpModemStat
);

Parameters
hFile

[in] Handle to the communications device. The CreateFile function returns this handle.
lpModemStat

[out] Pointer to a variable that specifies the current state of the modem control-register values. This parameter can be one or more of the following values. Value Meaning
MS_CTS_ON The CTS (clear-to-send) signal is on.
MS_DSR_ON The DSR (data-set-ready) signal is on.
MS_RING_ON The ring indicator signal is on.
MS_RLSD_ON The RLSD (receive-line-signal-detect) signal is on.

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by:dsch
ID: 10751055
Cheers,
Got that working straight away, Thanks for your help.
Kind Regards
David S
0

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