dsPICDEM? 1.1 Plus Development Board User’s Guide
B.4
GENERAL COMMANDS
B.4.1
Reset Command
The Reset command resets the LCD display and PIC18F242 to their power-up state.
Field
Opcode
Data
B.4.2
None
Home Command
Form
Value
0x80
None
The Home command sets all coordinate variables to their home values and leaves the
display unchanged.
Field
Opcode
Data
B.4.3
None
HomeClear Command
Form
Value
0x81
None
The HomeClear command clears the entire display and then sets all coordinate
variables to their home values.
Field
Opcode
Data
B.4.4
None
Scroll Command
Form
Value
0x82
None
The Scroll command rolls the display in the vertical axis by the amount ScrollY. The
LCD data array consists of 32 lines of 122 pixels each. If scrolling, value ScrollY is set
to zero and the top row of the data array is displayed on the top row of the display.
Field
Opcode
Form
Value
0xA3
Data
0
0
0
Y4
Y3
Y2
Y1
Y0
0-31
DS70099D-page 78
Note:
The Scroll command has no effect on the various coordinate systems. It
only changes the mapping of the data to the display (e.g., the top character
row would be rolled to the bottom row of the display surface if ScrollY = 8
but its location in the data array is still at 0).
? 2006 Microchip Technology Inc.
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