LCD(3)

NAME
LCD - LCD controller

SYNOPSIS
1-wire LCD controller by Louis Swart

FF [.]XXXXXXXXXXXX[XX][/[ backlight | counters.[0-3|ALL] | cumulative.[0-3|ALL] | branch.[0-1|ALL] | data | gpio.[0-3|ALL] | LCDon | line16.[0-3|ALL] | line20.[0-3|ALL] | line40.[0|1|ALL] | memory | register | screen16 | screen20 | screen40 | version | ]]

FAMILY CODE

FF

SPECIAL PROPERTIES

  backlight
write-only,yes-no
Write a non-zero value to turn on the LCD backlight. Write zero to turn off.

  counters[0-3,ALL]
read-only,unsigned integer
Read the number of times the gpio has been externally changed. If wired to a push switch, will count twice per button press. The LCD firmware resets all the counter when any one is read. Use the ALL extension to read them all, simultaneously, or use the cumulative property instead.
ALL is an aggregate of the properties, comma separated. Read atomically.

  cumulative[0-3,ALL]
read-write,unsigned integer
Cumulative sum of the counters property. To reset, write a zero. The cumulative counter can have any value written, which allows preservation of counts across program restarts if the value at program termination is stored.
Reading cumulative will reset the counters property. All the cumulative counters will be updated so that no counts will be lost. Reads of counters can be interspersed without losing cumulative accuracy.
Note: cumulative requires the caching system be compiled into libow.
ALL is an aggregate of the properties, comma separated.

  data
read-write,unsigned int
Contents of the LCD data byte (see datasheet). Not usually needed.

  LCDon
write-only,yes-no
Write a non-zero value to turn on the LCD screen (also clears). Write a zero to turn off.

  line16[0-3,ALL] line20[0-3,ALL] line40[0-1,ALL]
write-only,ascii
Write text to the LCD screen. Assumes 16/20/40 char width. (Cannot be determined from controller).
ALL is an aggregate of the properties, comma separated. Each is set in turn.

  memory
read-write,binary
112 bytes of on-board memory.

  register
read-write,unsigned int
Contents of the LCD register (see datasheet). Not usually needed.

  screen16 screen20 screen40
write-only,ascii
Write text to the LCD screen. Assumes 16/20/40 char width. (Cannot be determined from controller).

  version
read-only,ascii
Self-reported LCD controller version. 16 bytes.

STANDARD PROPERTIES

ALARMS
None implemented.

DESCRIPTION

  LCD
The LCD (3) controller is a microprocessor driven device that simulates the operation of 1-wire devices. It's creator has arbitrarily chosen the family code FF. The controller requires external power. Full details are available from the designer.
The main draw of the LCD controller is as any easy way to provide output to users.

ADDRESSING

DATASHEET
Available from http://www.louisswart.co.za/1-Wire_index.html

SEE ALSO

AVAILABILITY
http://www.owfs.org

AUTHOR
Paul Alfille (paul.alfille@gmail.com)