Re: Serial Comm Stuff

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#13356

From: Alan Bellingham
Date: Fri, 17 Oct 2003 12:23

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Jim Dodd <bcbuilderboy@yahoo.com> wrote:

>It should not be a NULL character that causes the problem. We send them 
>all the time. Check that you aren't calling WriteFile() with a buffer 
>length of zero (the third argument). I see a note in the source code we 
>bought from another vendor that calling WriteFile() with a zero length 
>buffer will hang.

Possibly this may be the problem.

If Colin is using strlen() to work out the length of the buffer, and the
buffer contains a single 0 byte, then the length-to-send will indeed be
zero.

If so, then it's probable that other data containing embedded null bytes
is also getting truncated.

Alan Bellingham
-- 
alanb@episys.com

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From: Alan Bellingham <alanb@episys.com>
Newsgroups: borland.public.cppbuilder.nativeapi
Subject: Re: Serial Comm Stuff
Date: Fri, 17 Oct 2003 13:23:35 +0100
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