Re: second computer for DRO readout

["alex" <telecomt-at-tht.net>]

OK, will start devoting some time and efforts to this.
Best regards, Alex
----- Original Message -----
From: Paul <paul.corner-at-tesco.net>
To: Multiple recipients of list <emc-at-nist.gov>
Sent: Saturday, December 21, 2002 8:27 AM
Subject: Re: second computer for DRO readout


>
>
> Hi Alex
>
> A small hack that sets an IO line high when the trajectory cycle is
entered
> and resets at the end allows me to see exactly how long it takes. On an
> Athlon 1800, the calculations are completed in around 20uS - With a cycle
> time of 1000uS, plenty of time is left for other tasks.
> The pulse generation task takes very little time in comparison, so PERIOD
can
> go as low as 8uS without degrading the overall performance of the computer
> too much.
>
> Whilst an 1800MHz processor is probably not the usual choice for an EMC
> control, I would expect a P266 would still have more than sufficient power
to
> run freqmod and all the other usual processes.
>
> Using the parallel port to comunicate with the encoder counters is a
> realistic option - To interface the encoders directly to the port is not.
>
> If you need any help with the EMC Makefiles, just give me a shout off
list.
>
> Regards, Paul.
>
>
>
> On Saturday 21 Dec 2002 12:14 am, alex wrote:
> > Of course, it would be nice to get DRO input directly into the parallel
> > port of EMC machine, as a part of the loop. However I red in an archives
> > that EMC wont be able to handle it due to an overload. If you think its
> > doable, I may try to give it a shot