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Re: Serial protocol with physical decoding

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Am 04.05.2017 um 08:14 schrieb Don Y:
> I want to push a bit stream through a series of *identical* devices
> and have (identical) software running on each determine if that
> particular device is being addressed, or not.
> 
> It seems like the simplest way to do so is to require each device
> to examine an address field in the packet and, if '0', assume the
> data that follows is intended for its consumption.  If not,
> decrement the address and pass the packet along.

Aha, so this week you're re-inventing cable position based addressing. :-)

Depending on the number of nodes, the likelihood of equal data being
sent to more than one node, and the length of said data,
encoding the target selection as a bit pattern that you shift, instead 
of a number that you decrease, might be more efficient.

It can be be even better to have two modes of operation for the whole
chain: either the network is learning its own layout, or it's working 
normally. Only the learning phase really needs the extra complication of 
e.g. an "take the first word of this message to use as their own address 
from now on, remove it from the packet, then transmit any remainder 
further down the daisy chain" mechanism.  Normal operation can then use 
a more straighforward addressing scheme.

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Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-03 23:14 -0700
  Re: Serial protocol with physical decoding Clifford Heath <no.spam@please.net> - 2017-05-04 16:40 +1000
    Re: Serial protocol with physical decoding Mark Storkamp <mstorkamp@yahoo.com> - 2017-05-04 12:26 -0500
      Re: Serial protocol with physical decoding rickman <gnuarm@gmail.com> - 2017-05-04 15:46 -0400
  Re: Serial protocol with physical decoding Jack <jack4747@gmail.com> - 2017-05-04 00:28 -0700
    Re: Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-04 00:48 -0700
      Re: Serial protocol with physical decoding rickman <gnuarm@gmail.com> - 2017-05-04 10:29 -0400
  Re: Serial protocol with physical decoding Reinhardt Behm <rbehm@hushmail.com> - 2017-05-04 16:44 +0800
    Re: Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-04 07:09 -0700
  Re: Serial protocol with physical decoding Tim Wescott <tim@seemywebsite.really> - 2017-05-04 09:54 -0500
    Re: Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-04 10:52 -0700
      Re: Serial protocol with physical decoding Robert Wessel <robertwessel2@yahoo.com> - 2017-05-04 14:53 -0500
        Re: Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-04 13:17 -0700
          Re: Serial protocol with physical decoding Robert Wessel <robertwessel2@yahoo.com> - 2017-05-05 00:30 -0500
            Re: Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-04 23:57 -0700
    Re: Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-13 21:58 -0700
  Re: Serial protocol with physical decoding Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2017-05-05 00:50 +0200
  Re: Serial protocol with physical decoding Les Cargill <lcargill99@comcast.com> - 2017-05-04 18:47 -0500
    Re: Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-04 20:07 -0700
      Re: Serial protocol with physical decoding Les Cargill <lcargill99@comcast.com> - 2017-05-07 09:21 -0500
        Re: Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-07 10:22 -0700
        Re: Serial protocol with physical decoding Jack <jack4747@gmail.com> - 2017-05-08 00:04 -0700
  Re: Serial protocol with physical decoding Martin Riddle <martin_ridd@verizon.net> - 2017-05-06 12:14 -0400
    Re: Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-06 12:29 -0700
      Re: Serial protocol with physical decoding Martin Riddle <martin_ridd@verizon.net> - 2017-05-08 18:53 -0400
        Re: Serial protocol with physical decoding Don Y <blockedofcourse@foo.invalid> - 2017-05-08 18:50 -0700

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