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Re: [Development] Lights, using two micros.
- To: ukha_d@xxxxxxx
- Subject: Re: [Development] Lights, using two micros.
- From: "Dr John Tankard" <john@xxxxxxx>
- Date: Sun, 03 Jun 2001 10:05:31 -0000
- Delivered-to: rich@xxxxxxx
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
--- In ukha_d@y..., "Keith Doxey" <ukha@d...> wrote:
> Individual dimmer modules could be a great way to go.
>
> Onboard 12C508.
>
> 8 pins - 2 for power leaves 6.
>
> a. serial input
> b. Relay Output
> c. Triac Opto drive
> d. Zero cross detect
> e. Address 0
> f. Address 1
>
> Allows 4 different PIC addresses on one serial line from Rabbit
> PIC 12C508 or 12C509 is about 70pence. It would do almost all the
work in
> the dimmer.
>
> Or by having different PICs preprogrammed with the address upto
possibly 16
> it would leave 2 pins spare on the PIC. By adding a couple of Opto
Isolators
> you can get feedback on the true state of the load. EG. Lamps
blown, Relay
> failed, Triac Short etc and send a message back to the main system
informing
> of the problem.
I had not considered a pic for each module ! but could be a good
Idea, making it a throw away module.
The prototype uses one PIC a 16C65 which handles everything. But I do
like your idea, although it does give me two small problems :-
My ICEPIC will not emulate the 12bit opcode range only the larger
My compiler ony supports 14bit opcodes.
Having said all that I have proved system It should not be do
difficult to port it even if I cannot emulate.
One other problem I was running much faster then 4Mhz but if I only
have one channel there should be plenty of capacity.
John
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