Re: FIRM Pics + Questions

["Frank Mc Alinden" <armagh@xxxxxxx>]

Hi Shane

Below is a recent recap from Dan on the communications between pc and
interface..

RS232 PIN OUTS

Pin 1 = DCD = ir rx input
Pin 2 = TX    = pc transmit
Pin 3 = RX  =  pc receive
Pin 4 = DTR = ir tx output (non modulated)
Pin 5 = GND

The pc interface also incorporates the 38khz oscillator


1. Send routine:
- PC send the zone code byte as:
1cc1zzz    where cc is the checksum and zzz is the zone,
like that:
    Zone1 = 48h
    Zone2 = 59h
    Zone3 = 5Ah
    Zone4 = 6Bh
    Zone5 = 5Ch
    Zone6 = 6Dh
    Zone7 = 6Eh
    Zone8 = 7Fh
- PC waits for the FirM answer which must be the same byte with bit 6
reset,
means:
0cc1zzz, so for the 8 zones:
if the answer is not correct, then IRM consider that the zone has not
been
updated correctly and do not send the command.

2. Receive routine:
- PS send char '50h' means WHICH ZONE
- PC waits for the FirM answer like that:
            Zone 1=
8h
            Zone 2=
19h
            Zone 3=
1Ah
            Zone 4=
2Bh
            Zone 5=
1Ch
            Zone 6=
2Dh
            Zone 7=
2Eh
            Zone 8=
3Fh

HTH

Frank



----- Original Message -----
From: "Shane Harrison" <shane.harrison@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, October 31, 2002 7:14 PM
Subject: RE: [ukha_d] FIRM Pics + Questions


> Frank,
>
> After discussions with Dan it seems that for my application I will
be
> trying in the first instance to interface FirM into Misterhouse
(Linux)
> either directly or via modifications to LIRC daemon running on the
same
> box.
>
> I will have perhaps other questions of a detailed nature later, but
a
> general question is how is the zone information (3 bit BCD value)
> conveyed to the PC eg. have you used "unused" RS232 control
lines,
> separate I/O, special serial command at end of IR data?
>
> Cheers
> Shane
>
>
>
> http://www.automatedhome.co.uk
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