Re-active modem transmission in async. mode

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#30

From: DONG
Date: Thu, 29 Apr 1999 00:00

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In my modem communication software, I use the async. I/O mode for data
transmission. I defines an Overlap event and then pass it to the writefile
call.

Before each WriteFile call, I wait for the Overlap event turning to
singaled state.

But several minutes after the start of transmission, I found that the
transmission is interrupted and the overlap event remains always
non-signaled. So I try to restart the transmission with the following
instructions:

   ClearCommError(ModemFile, &dwError,&dwStatus);
   PurgeComm(ModemFile, PURGE_TXABORT | PURGE_TXCLEAR);
   SetEvent(TxOverlap.hEvent);

The modem transmission remains suspended. I have tried to add
SetCommBreak(.) and ClearCommBreak(). No effect.

Can anyone tell me what it is wrong and how to re-activate the modem
transmission in such case?

Thanks in advance.


Lixin DONG

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From: "DONG" <lixinDong@csi.com>
Subject: Re-active modem transmission in async. mode
Date: 1999/04/29
Message-ID: <01be929c$d060a260$ba4ee8c3@dong>
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