[PD] [comport] for windows

[Winfried Ritsch]

Hallo,


> Winfried Ritsch wrote:
>
> The OS is Windows 2000, the comport.c was compiled with MS VS6.0 using
> the makefile.
>
for WINDOWS 2000 i had a #ifdef WIN2000 in my code which wasnt in CVS, i just 
committed now. This  means the    FILE_FLAG_OVERLAPPED at open is not used. I 
never  found out why but then WINDOWS2000 worked,

Else the recommended code for Windows read is using  
 SetCommMask() and WaitCommEvent() before reading a byte
 I put the code  commented out in the external, maybejust uncomment and 
compile again. This code dindt work for Windows NT so it was commented out, 
even i copy and pasted it from seriell example of MS VS6.00 which also didnt 
work.



> Two years ago IOhannes sent me a version of the comport external. It
> didn't work on Windows 2000 properly so I tuned it a little bit. I
> tested it, unfortunetaly, with slow traffic and short time period only
> (9600 baud, one or two minutes of communication) and thus, I thought I
> fixed the problem. Now, I use a higher baudrate (57600baud) and streamed
> data, which means, I get appr. 5000 Bps for the serial port and pd
> crashes like this:
>
The complicated thing is that under Settings in Windows you can specify the 
baud rate and sometimes it was not possible to overwrite it with the example.


> I create the comport object with the proper baudrate in naked pd on the
> machine receiving the data stream and wait (the data stream from the
> periphery must have been started before). Half an hour later, pd
> increases the CPU load to 50% and becames not responsible...
>
This looks like a blocked read (see above).

> I looked to the CVS repository for a newer version, but it seems to be
> the one I got from IOhannes. Do you have a newer one? If yes - could you
> put your version into CVS or just send me the comport.c file - I'd like
> to diff it against mine to see what I'm doing wrong here.
>
I just updated the CVS now.


mfg winfried