Subject:
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Re: Block STACKING - feb 2005?
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Thu, 25 Nov 2004 22:33:44 GMT
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Viewed:
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602 times
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In lugnet.org.ca.rtltoronto, Iain Hendry wrote:
> "Calum Tsang" <tsangc@mie.utoronto.ca> wrote:
>
> > Serial? I guess the IR port is a serial port of sorts, but by serial I presume
> > you mean by serial port like an SPI interface to link up extra devices,
> right?
>
> Calum, SPI is as far from Serial as... as far as cerial is from a mushy
> banana. :)
>
> SPI uses 2 16-pin connectors (M/F F/M) on the moulding machine/robot, each
> line has a specific designated signal and everything is dry-contact (relays)
> at 24 VDC. Its old, crude, clunky, but safe - and it works like a charm.
> Signals like "Mould fully open", "Permit Ejector Retract", "Cores fully
> pulled", "Robot clear of IMM", and "Hey! I'm in the mould, don't squish
> me!" etc... :)
No, it's a different SPI:
http://belladonna.media.mit.edu/groups/el/Projects/hb/software/contrib/dedmonds/spi_comBB.asm
The MiniBoard (which the RCX was based on) has this thing called SPI, which
allows you to link multiple Miniboards together. It is a serial protocol.
What you're talking about sounds like a dry contact general purpose interface.
Calum
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Block STACKING - feb 2005?
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| (...) presume (...) right? Calum, SPI is as far from Serial as... as far as cerial is from a mushy banana. :) SPI uses 2 16-pin connectors (M/F F/M) on the moulding machine/robot, each line has a specific designated signal and everything is (...) (20 years ago, 25-Nov-04, to lugnet.org.ca.rtltoronto)
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