Re: second computer for DRO readout

[Paul <paul.corner-at-tesco.net>]

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