one wire

[karenhornby]

Thanks, that actually helped a LOT, even though it threw me at first and I had to read it several times...

IF I've got what your saying right, the code to use a standard 4 line lcd module becomes this?

'****************************************************************
'*  Name    : 1-Wire-ID.Bas                                     *
'*  Author  : Bruce Reynolds, modified by Me!                   *
'*  Date    : 18/16/2008                                        *
'*  Version : 1.1                                               *
'*  Notes   : 1-Wire Identifier                                 *
'*          ; Identifies & Prints 1-Wire Device Information     *
'*          : Uses 20 x 4 PARELLEL LCD for Display              *
'****************************************************************
DEFINE  LOADER_USED 1   ' Boot loader is being used
DEFINE  OSC 4           ' We're using a 4 MHz oscillator
DQ      VAR PortC.0	' One-wire data pin "DQ" on PortC.0

ID      VAR BYTE[8]     ' Array storage variable for 64-bit ROM code

Begin:
    PAUSE 500           ' Wait .5 second
    lcdout $fe, 1       ' Clear LCD on power-up
    
Start_Convert
    OWOUT DQ, 1, [$33]  ' Issue Read ROM command

ID_Loop:
    OWIN DQ, 0, [STR ID\8]' Read 64-bit device data into the 8-byte array "ID"
    lcdout $FE, $80 "Family Code = ",HEX2 ID[0],"h"
    lcdout $FE, $C0"Ser# = ",HEX2 ID[1],HEX2 ID[2],HEX2 ID[3],HEX2 ID[4],HEX2 ID[5],HEX2 ID[6],"h"
    lcdout $FE, $94  "CRC Value = ",HEX2 ID[7],"h"
ID_Device:
    IF ID[0] = $5 THEN
       lcdout $FE, $D4, "Device = Switch     "
    ENDIF
    IF (ID[0] = $28) OR (ID[0] = $22) THEN
       lcdout $FE, $D4 "Device = Temp Sensor"
    ENDIF
    IF ID[0] = $01 THEN
       lcdout $FE, $D4 "Device = Serial #   "
    ENDIF
    PAUSE 10000         ' 10-second pause
    GOTO Start_Convert 
    
    END

And follow the schematic, POT and all (several seem to not use the pot and wonder why it will not work, some LCDs will not require it, but when in doubt...)
POT??? Didn't actually see a schematic. I'm assuming you mean the pot to vary the contrast of the lcd?

Oh sorry 2 other things
I assume this can be used with most small pic's ?
2nd one
Using a DS2405 switch, am I right in thinking that once I've sent a command to either turn it on or off then it stays latched in that state untill it's addressed again and told to do something else?

Just seen another problem.

 
OWOUT DQ, 1, [$55,$05,$C5,$C3,$08,$00,$00,$00,$CD]' Match ROM, byte-sized, reset before

I understand the $55 is Match rom BUT it says

The red hexadecimal number $55 is the command for Match ROM. 
The blue hexadecimal numbers $05,$C5,$C3,$08,$00,$00,$00,$CD 
are the unique 64-bit ROM code numbers inside the specific DS2405 
addressable 1-wire switch we're trying to communicate with.

The problem I have is the hex code for the device
Using his device ID routine (above) it comes back with an example but only shows 6 sets of 2digit Hex numbers but above addressing the 1wire units, it shows the address as 8 sets of 2 digits

UNLESS? in his example aboe the $05 is the family code, and the $CD at the end is the CRC code??
So any device I want to address I'd put the Family code first then the 64bit address then finish it with the CRC code?