On 4 Jan 99, 11:33  Dr. Imre Bartfai wrote:

> can you tell us a reliable specification source for the Dallas 1-wire (TM)
> protocol. I'm fascinated by it...

I believe most of their data sheets provide enough information to
implement it. I just wrote small test program which interfaces with
a handfull of 1820 sensors (using bare CCS C, with no assembly
interspersed), using just that info, and the program worked the first
time I tried it out.

There are two questions, though.

a) is there anything proprietary about that protocol, besides the
trademark? While it might be easy to come up with a
nonproprietary version, one would prefer to follow their specs to the
bit, if only for being able to mix different devices on the same "1-
wire".

b) if there is a satisfactory answer to a) - what about the so called
"family code"? It would certainly be nice to know which family
codes NOT to use.

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