Serial port communication

Rein Klazes rklazes at
Sat Mar 6 06:27:35 CST 2004

On Sat, 6 Mar 2004 11:40:51 +0100, you wrote:

> Hello all,
> I've found the reason of the problem I mentioned a couple of weeks before. The problem was I hadn't reveived 1-byte messages sent through the serial port to a Window application running under Wine. 
> This byte actually came through to my program, but ReadFile reported in this case an error, that I didn't expected, because it hadn't been in fact there.
> I analyzed only two type of errors: ERROR_IO_PENDING and ERROR_IO_INCOMPLETE. By all other errors the input was just ignored.
> Now in case  when only one byte had been received ReadFile returned with the error 87 (ERROR_INVALID_PARAMETER or something like that, I haven't the symbolic handy now), although all parameters were actually OK.
> And the received byte had been read with the correct length of received message (1 in this case), so it could be used for as a 'normal' input.
> I made a change just to ignore this error and now everything works fine.
> Is it a bug in Wine or something else?
> Vlad Britt

If this does not happen in Windows, then it is a bug in Wine. 
If you can enter a report in with specific
description, preferable actual program snippet, how you read bytes from
the serial port we may be able to track this down.

Rein Klazes
rklazes at

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