General serial communications issues
James Courtier-Dutton
James at superbug.demon.co.uk
Mon May 31 12:54:24 CDT 2004
Eric Pouech wrote:
> James Courtier-Dutton a écrit :
>
>> I attach two logs taken with the command: -
>> WINEDEBUG=+comm wine ttermpro.exe
>
> WINEDEBUG="+comm,+file,+ntdll" would be more helpful. TIA.
>
>
>
In addition, ttermpro.exe is setting the following: -
memset(&ctmo,0,sizeof(ctmo));
ctmo.ReadIntervalTimeout = MAXDWORD;
ctmo.WriteTotalTimeoutConstant = 500;
SetCommTimeouts(cv->ComID,&ctmo);
Which according to
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devio/base/commtimeouts_str.asp
Means: -
ReadIntervalTimeout:
Maximum time allowed to elapse between the arrival of two
characters on the communications line, in milliseconds. During a
ReadFile operation, the time period begins when the first character is
received. If the interval between the arrival of any two characters
exceeds this amount, the ReadFile operation is completed and any
buffered data is returned. A value of zero indicates that interval
time-outs are not used.
A value of MAXDWORD, combined with zero values for both the
ReadTotalTimeoutConstant and ReadTotalTimeoutMultiplier members,
specifies that the read operation is to return immediately with the
characters that have already been received, even if no characters have
been received.
So, WINE should be "return immediately with the characters that have
already been received, even if no characters have been received."
WINE is obviously not doing this.
Cheers
James
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