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From:	"Robbo" <przykre AT ale DOT nie DOT mam>
Newsgroups:	comp.os.msdos.djgpp
Subject:	RS232 transmission sometimes fail on AM2
Date:	Wed, 18 Jul 2007 18:38:35 +0200
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

Hello,

I wrote some program on PC which controlls
an industrial machine. There is also electronic
device (with microcontroller Atmel AVR)
connected with RS232 to the PC.
I found that there are sometimes problems
with serial transmission, since I have moved to
64bit processors (AM2 Sempron).
Not so frequently, the electronic device doesn't
catch command sent by the PC and vice versa
- the PC doesn't catch command sent by
the electronic device to it.
I use delay() function in my program.
I use Free DOS.

Is there any known problem with programs
written in DJGPP on 64bit processors?
Does delay() function work correctly on
such processors (unfortunatelly I can't
check it now)?

One more thing: I installed special 2xRS232+1xLPT
expansion card in the PC and connected the electronic
device with RS232 to it. I found that problems with
loosing sent commands are more frequently than
when I connected RS232 cable directly to a main board.


Thanks in advance for Your help.

Robbo

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