Dario Greggio wrote:
> Neil Cherry wrote:
> 
>>> With RS485 CAT.5 wire, I have no problems :)
>> That fixes Layer 1 and what of Layer 2? :-)
> 
> Checksum, Collision Detect ... addressing...
> I developed my protocol: nothing better or worse than existing, but, you 
> know, pleasure in creating it! (and wrapping it into C++  Classes for 
> MSVC, and more)

The layer 2 portion is always a bit harder ;-). But I agree it's
not a terrible burden. And I definitely understand the pleasure
in creating something of your own. My wife thinks I'm nuts when
I've created something new. She pretty much shoots down my joy
when I do something complex and make it simple. She views things
as 'all you have to do' not realizing that it takes hours of
work, a certain level of intelligence and imagination and a
lot of perseverance.

>> You are not impressed by the analog technology used in the late
>> 1970's? Boy are you spoiled! ;-) For the time the design is very
>> cool, of course all this can be pretty easily handled with a PIC
>> (but now we could also throw in ACKs). Take a look at this if your
>> curious:
> 
> Talking to me? :)
> Yes, I said they work pretty well having in mind the way, times, and 
> scope they were made for.

My apologies for my witless sarcasm, it is my attempt at humor. I've
always been very impressed by the hardware. Very simple, except for
the analog shift chip use in the earlier product. Today they use
the PIC1657 (?) in a lot of their products. I wish they had chosen
the 1684 as then they would have solved some problems with
interrupts. Of course a simple ACK today would fix half of the
problems with X10. Of course X10 doesn't seem to be interested in
investing anymore time and money in the basic X10 product.

-- 
Linux Home Automation         Neil Cherry       ncherry@linuxha.com
http://www.linuxha.com/                         Main site
http://linuxha.blogspot.com/                    My HA Blog
Author of:    	Linux Smart Homes For Dummies
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