Re: [PD] pd and serial object

hello,

[...]

in mail http://iem.kug.ac.at/mailinglists/pd-list/2001-12/0159.html from mark newman seems to be a solution for the win2k comport object: ////////////////////////////////////////////////////////////// I grabbed Winfried Ritsch's comport object and code from http://iem.kug.ac.at/ritsch/programmier/pd_externals/

[...]

fd = CreateFile( sys_com_port[com_nr],
         rw,
         0,
         0,
         OPEN_EXISTING,

         /* FILE_FLAG_OVERLAPPED */ 0, // changed to non-overlapped

--mwn 0);

... and now it works. I believe this is the correct way to open the port, since the code is in fact polling (every millisecond, by default) and not in fact using asynchronous reads. Changing the object to use overlapped/asynchronous reads would probably be an even better fix, but that'll have to be for another time.

the problem I saw (read), that there is no garantuee that with this fix the serial will not block for a amount of time (like it does on W95 up to 10ms if I set this) since "no overlap" means in my opinion that it waits for a input until time out (at least a win scheduler tick), but maybe it is correct anyway...

can anyone confirm if "overlap" is not needed on Win platforms for i/o?

I have no w2k plattform to test, just want to release a working version.

thanks

	  mfg winfried