wine users - Feb 2004 - Serial port communication

Hello, 

I'm trying to use my Visual C++ program under Linux using Wine.
My program configurates a serial port, sends and receives data through it.

At first everything seemed to be running, but then I noticed a very curious
thing: the program running under wine seems to have no notice when a single byte
was sent to it to the serial port. If I send two or more bytes - everything OK.
With one byte - no effect.

It is very important for me to receive single bytes, because my program
communicates with a device, that sometimes sends confirmation consisting of a
single byte.

May be anyone can give me some hint. I am new to Linux, so some advice where to
start looking would be also very valuable to me.

Vlad Britt
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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
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