RE: [CAD_CAM_EDM_DRO] Re: possibly interesting

> > Hi Graham,

On closer inspection, it appears that it has 2K RAM per processor but the
FLASH ROM is shared. Might be that the RAM is also shareable for
inter-processor communication. Price in singles is listed at $25. For
about that same price TI makes a nice DSP F2812 with 16 PWM, a couple of
quadrature encoder counters, A/D, more counter timers, 32 bit instruction
set with the DSP capabilities and I think runs 150Mhz with the PLL on.

Also, ultimately if this were to be a hobby project the cost of the
development and programming tools are a major consideration.

I used the PIC 18F series for the Electronic Leadscrew. The 8 bit
architecture doesn't allow me to use 32 bit integers for position and speed
control for two stepper motors. It can do one at a time but not two. I had
someone try out some of the firmware on a Freescale 9S12 and it too doesn't
have the 32 bit horsepower. It would be interesting to see how the 8x 32
bit processor did the interrupt stepping routines since that's 75 percent of
the execution time of the ELS software.

John

>
>
> They seem to have a charector set built into ROM. I like the fact you
> can produce video out and put that straight into a little TFT screen,
> for some of the stuff I want to do such as tool path progress, that
> would be nice and would not tie my hardware to a specific display.
>
> For me 8 processors might allow me to split tasks, one can record
> pulses to the MMC card, the other can keep track of current position,
> the next deal with the display. I need to read more I spend any money
> though.
>
> Graham
>
>
>
>
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