RE: ir transmitter some success

["Ian B" <Ian@xxxxxxx>]

>Hope Fatherhood is treating you well ;)
So far so good. You have no idea how pleased I am that we fathers
cannot
breast feed the little one!!

Indeed this is the IR extender project.

>I assume you are using a PIC in each receiver to decode the IR signal
and
>then adding a station-id
Yes to this bit.

>to a master device which
>can then transmit to the destination.
No, not really. Since this is a multi master bus (485) I plan to have
the
devices transmitting either to a PC based node or a generic IR
broadcast.
This choice would be set by jumper and gives more flexibility. Each
node
would have an ID so the PC base app would know where the signal
originated
(zoned input). If any node received a broadcast message it would just
transmit it. Since each node has an address the PC based app could send
a
signal to a specific node for transmission (zoned output). Cool, we even
get
error detection and correction as part of the package once I have
written
it.

>The master device controlling the
>transmissions of each PIC to prevent collisions?
No, the PIC's and PC app would decide when the bus was free and
transmit
accordingly.

>I noticed on your IR extender project that you have run out
>of registers for the data
Already sorted. I just had to double the number I had initially
available
which was a programming task only. I am starting work on the SNAP
protocol
side of things now. I have some partially working code which I need to
modify but that is very time consuming.
Soon........ish.........maybe.........

Ian B




>-----Original Message-----
>From: Des Gibbons [mailto:des@xxxxxxx]
>Sent: 02 June 2002 11:10
>To: ukha_d@xxxxxxx
>Subject: RE: [ukha_d] ir transmitter some success
>
>
>Hi Ian,
>
>
>Hope Fatherhood is treating you well ;)
>
>Insanity is a place I'd rather avoid so I'll knock that one on the head
:)
>
>I take it there is nothing on your webbie, or is this something to do
with
>the IR extender project?
>
>I assume you are using a pic in each receiver to decode the IR signal
and
>then adding a station-id and sending the command to a master device
which
>can then transmit to the destination. The master device controlling
the
>transmissions of each pic to prevent collisions? If so are you using
RS-485
>between PIC's? I noticed on your IR extender project that you have run
out
>of registers for the data, is it a case of going to a better PIC, or
using
>an EEPROM as a cache?
>
>Sorry for all the questions, don't rush to reply, I know what it's like
;)
>
>
>Cheers, Des.
>
>> -----Original Message-----
>> From: Ian B [mailto:Ian@xxxxxxx]
>> Sent: 02 June 2002 20:41
>> To: ukha_d@xxxxxxx
>> Subject: RE: [ukha_d] ir transmitter some success
>>
>>
>> Hi Des
>>
>> What you need is the system I am in the middle of building. It
will give
>> zoned input and output all down the serial port. It won't be
connectable
>> directly to HV or similar though (I don't think). It is a work
>in progress
>> and time is the problem as always.
>>
>> I ended up building this after trying to do collision
detection
>with logic
>> chips and effectively doing what you suggest. I decided this
was
>> a quick way
>> to insanity!!
>>
>> I wish you luck
>>
>> Ian B
>>
>> >-----Original Message-----
>> >From: Des Gibbons [mailto:des@xxxxxxx]
>> >Sent: 02 June 2002 07:38
>> >To: ukha_d@xxxxxxx
>> >Subject: RE: [ukha_d] ir transmitter some success
>> >
>> >
>> >Frank,
>> >
>> >
>> >OK, just to really make things complicated ;)
>> >
>> >Would it be possible, you're gonna love this, to reverse
the
>> whole concept
>> >and use it for zoned IR input :) obviously each zone would
need
>a TSOP or
>> >similar, but is there a simple way of using trannies to
indicate
>> which zone
>> >is active and send the data on its way. Collisions seem to
be
>the biggest
>> >stumbling block to me :/
>> >
>> >Obviously the LPT port would have to be bi-directional.
>> >
>> >/me scurries off to see how many pins are available on an LPT
port ;)
>> >
>> >Cheers, Des.
>> >
>> >> -----Original Message-----
>> >> From: Frank Mc Alinden [mailto:armagh@xxxxxxx]
>> >> Sent: 02 June 2002 18:23
>> >> To: ukha_d@xxxxxxx
>> >> Subject: Re: [ukha_d] ir transmitter some success
>> >>
>> >>
>> >> Now thats Better Des
>>
>>                                 
I cant see why not . So long
>> as you dont
>> >> change the state of the  lpt  port  pins
that are being used for the
>> >> multiplexer while transmitting just the tx pin . Pin 4
which
>> >> enables the 555
>> >> i would opto isolate from the printer port.
>> >>
>> >> Frank Mc
>> >> ----- Original Message -----
>> >> From: "Des Gibbons" <des@xxxxxxx>
>> >> To: <ukha_d@xxxxxxx>
>> >> Sent: Sunday, June 02, 2002 3:51 PM
>> >> Subject: RE: [ukha_d] ir transmitter some success
>> >>
>> >>
>> >> >
>> >> >
>> >> > >
>> >> > > Sorry Des
>> >> >
>                
I just assumed serial . That shouldnt be a problem
>> >> > > ,selecting zones . I assume some other device
is generating
>> >> the ir 38khz
>> >> > > carrier?
>> >> > >
>> >> >
>> >> >
>> >> > errr, the LPT port :)
>> >> >
>> >> > http://www.czechin.com/minidisc/gener.gif
>> >> >
>> >> > Now, can they both be on the same LPT port is the
question :)
>> >> >
>> >> > Des
>> >> >
>> >> >
>> >> > For more information: http://www.automatedhome.co.uk
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>> >> >
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>> >> >
>> >>
>> >>
>> >>
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>>>
>>>
>>
>>
>>
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