[Coco] Questions about the Coco3 GIME Timer

[Gene Heskett]

On Wednesday 14 February 2007, jdaggett at gate.net wrote:
>On 14 Feb 2007 at 9:30, Gene Heskett wrote:
>> The point is, that to drive a milling machine, we would need one of
>> these per axis being moved.  That's at least 2 just to cut circuit
>> boards...
>>
>> --
>> Cheers, Gene
>
>Gene
>
>ever considered using a CPLD and programming it to have the three
> counters you need. You can have the timers generate a flag when count
> is up. The the program can poll the memory mapped register file or have
> the GIME timer tell you when it is time to read the counter status.
>
>The CPLD program would be rather simple to do and rather inexpensive add
> on board. The counters could be driven by the E clock and each counter
> could have a prescalar to a 16 bit free running counter.
>
James: Basicly I'm throwing out 'what if' ideas for George to pursue here 
just so he can say he did it with a coco.  I myself plead ignorant of any 
CPLD knowledge.  But I might be able to throw together some short 
assembly code loops to do the actual driving of the motors.

Me, I took the easy way out, I'm running EMC2 on a kubuntu machine running 
on an XP-1400 Athlon with the realtime kernel modules loaded, driving a 
xylotex 3 axis amp & 3 of their  nema 23 double stack 262 oz/in motors 
mounted on a $300 Harbor Freight micromill.  And seriously considering 
the Saig X3 as a replacement for that puny powered micromill.  I'd 
druther carve parts.  Writing a little g-code is pretty simple once you 
get your head into it.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Yahoo.com and AOL/TW attorneys please note, additions to the above
message by Gene Heskett are:
Copyright 2007 by Maurice Eugene Heskett, all rights reserved.