Use of serial port events EV_EVENT1, EV_EVENT2

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whilst debugging some code accessing serial ports I was looking at the list of events that can be waited on. I couldn't find any info or code that uses EV_EVENT1 and EV_EVENT2 events?

What I have tried:

Does anyone know what these events are and how/when they are used? Just interested in what they are and how they are used.

Posted 17-Jul-20 1:38am

Member 10576277

Updated 20-Jul-20 5:17am

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[no name] 20-Jul-20 10:43am

Have a look here: https://www.acksys.fr/en/wp-content/uploads/products/WAN-HDLC-Hardware-Windows_Driver-Firmware-DTUS048.pdf[^]
and search for "EV_MCXLAPB" in the document

Looks like they are not directly related to serial communication (RS232) but will be used e.g. for HDLC.

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User 11060979 · Answer 1 · 2020-07-20T05:17:00

Solution 2

Have a look here:
https://www.acksys.fr/en/wp-content/uploads/products/WAN-HDLC-Hardware-Windows_Driver-Firmware-DTUS048.pdf[^]
and search for "EV_MCXLAPB" in the document

Looks like they (EV_EVENT1 and EV_EVENT2) are not directly related to serial communication (RS232), but will be used e.g. for HDLC.

I hope it helps.

Posted 20-Jul-20 5:17am

User 11060979

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Member 10576277 21-Jul-20 6:57am

Thanks will check it out

Richard MacCutchan · Answer 2 · 2020-07-17T02:45:00

Solution 1

Google found : GetCommMask function (winbase.h) - Win32 apps | Microsoft Docs[^]

Posted 17-Jul-20 2:45am

Richard MacCutchan

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Member 10576277 20-Jul-20 6:44am

That was the same page I could find regarding it. But isn't helpful in knowing what it is OR how to use it OR even why use it at all.
That pages doesn't mention anything about it beyond "An event of the first provider-specific type occurred". So useless i'm being really thick here it might of well of said "hg9gunerugn349pghungviuqrbnrgiqr0gihqign9n"!

Richard MacCutchan 20-Jul-20 9:54am

Looks like no one really uses them.

Member 10576277 20-Jul-20 10:06am

Seems that way. I've added a few more tags to message to see if it gets a wider viewing etc