On Fri, 2009-03-27 at 22:32 +0100, Lars Andersson wrote:
> Hi list,
> Would "serial_dac.comp" be a good starting point for making a "SPI.comp" or
> do you recommend anything else to start from? Maybe there is something
> written already?
>
> If reasonable I would like to send more than one half bit per BASE thread
> click.
> I am talking to a PIC18F4520 so 8 bits at a time would be nice.
>
> Regards,
> Lars
Talking to a PIC at base period rates seems to be pretty fast to me. Is
the communication to your PIC for motion control? Since the PIC can have
allot of intelligence, it seems that the communication rate can be
fairly slow, because the PIC will be handling the the high rate
functions locally.
I am not a proficient programmer, but I don't see much that can be done
to get around having to convert bytes to bits and then clocking them
out.
Peter at mesanet.com may be able to get base rate SPI output from his
Anything I/O cards.
>From the 5i20 manual:
"
SUPPLIED CONFIGURATIONS
HOSTMOT2
HOSTMOT2 is available in several configurations the vary the
number of servo or
step generator channels, plus miscellaneous I/O options including 32
bit buffered UARTs,
SPI interfaces, SSI interfaces etc.
"
----------------
Kirk
http://www.wallacecompany.com/machine_shop/
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