From: "Simon Redwood" <spredwood AT sri-net DOT demon DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: DOS ioctl ?
Date: Wed, 11 Aug 1999 23:03:22 +0100
Organization: SRi Ltd
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

as I am writing a peice of code to basically put some binary data down the
serial port.  My problem comes when
the bios times out because of flowcontrol.  Under unix this is easily
resolved, as I can just set the line to CLOCAL with an ioctl setting.  This
does seem to work under DOS to well, unless its the way I am doing it.


unsigned char data[...] = {
 0xFF, 0x8E, 0x01, 0xFF,  0xCE, 0x10, 0x00, 0x6F,
 0x35, 0x18, 0xCE, 0x10,  0x3F, 0x86, 0x07, 0x8D,
}

...
...

_bios_serialcom(_COM_INIT, 0, _COM_9600|_COM_NOPARITY|_COM_STOP1|_COM_CHR8);

...
for(i=0;i<...;i++)
    _bios_serialcom(_COM_SEND, 0, data[i]);

...