Re: Very Slow communication Init on Windows-98, why?

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#4573

From: Stefan Kvist
Date: Wed, 11 Jan 2006 22:01

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"Ram" <Ram@NoSpam.com> skrev i meddelandet 
news:43c24b5a$1@newsgroups.borland.com...
>
> It's important becouse in the
> communication protocol that i'm using i should init the com for
> each message (i send some bytes with parity and the rest of the
> message without parity, so for each message i have to call the
> init function 2 times) and it's takes lot of time in the Win-98
> computer.


A different way to solve the problem is to only initialize the port
once with parity set to 'none'. Then add the parity bit to those
bytes that require it in the software. If you use a lookup table for
the parity it will only cost you a few clock cycles.

Stefan Kvist

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From: "Stefan Kvist" <stefan(dot)kvist(at)linkoping(dot)mail(dot)postnet(dot)se>
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Subject: Re: Very Slow communication Init on Windows-98, why? 
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