Service manual

EXTERNAL SERIAL CONTROL PROTOCOL
B-15
April 2001
Part No. 001-9800-203
DISPLAY OFF
Function: This message disables the device
display.
Device Actio
n: Turn off the LCD display and all
indicators.
Format
:
Data
: None
DISPLAY ON
Function: This message enables the device display.
Device Action
: Enable the display and indicators.
If a display image is present it is displayed.
Format
:
Data: None
LOAD CHARACTER FIELD
Function: This message updates the image to
display in one specific ASCII field.
Device Action
: Load the custom character bit map.
Character
: Eight custom characters may be defined.
Character numbers are mapped from 0x00 to
0x07 and are repeated from 0x08 to 0x0f.
Data
: The first data field is the top row of the 5 x 8
character block, the second field is the second
row and so on.
SCANNING CURSOR INDICATOR
Function: This message controls the underline
cursor which can be scanned across the alpha
display line 1.
Device Action
: Update the underline running
cursor status.
Format
:
Data
:
0x00 - disable underline running cursor
0x01 - enable underline running cursor
WRITE BLINKING ICON FIELD
Function: This message updates the icon field of
the display device. Icons are bit mapped. A “1”
in the bit map turns ON the blinking function
for that icon, and a “0” turns OFF the blinking
but leaves the icon ON.
Device Action
: Modify the status of an icon by
turning ON or OFF the BLINKING function for
that icon using the bit map.
Format:
Data: Icon bit map (follows the LCD icon mapping
artwork).
WRITE CHARACTER FIELD
Function: This message updates the image to
display in one specific ASCII field.
Subcode
Display Off
0x00
Subcode
Display On
0x01
Subcode Character Data
Load character
field
8-bit character
number
Eight 8-bit map rows
for character number
0x25
Subcode Data
Underline action 0x00 - 0x01
0x15
Subcode Data
Write icon field ICON MAP
0x31 16 bits