User manual

Microgate MicroGraph LED User Manual Page 71 of 88
3.2.3 GRAPHICAL FRAME SYNTAX AND COMMAND TABLE
Therefore, the frame format for the graphical display board is:
Field
Length
Content
Meaning
Start Frame
1
ESC
(0x1B)
Start Command
Address
1
@ (0x40)
Graphical Display Board Identifier
Command
1
Variable
Command to send to the display board
Start Horizontal
Coordinate
2
0-809
max. 9 display boards placed in sequence (the first
column is the first to the left)
Start Vertical
Coordinate
2
0-383
max. 16 display boards placed one on top of the
other (the first row is the first one from the top)
Binary Operation
1
0-4
See relevant table below
Font
1
0-3
Binary code – Height x Width
0=Default
1=9x7 non-proportional (SMALL)
2=15xVariable proportional(MEDIUM PROPOR.)
3=31xVariable proportional (LARGE)
4=31x18 'full size modular', only numerical
(SPECIAL)
5=15x10 non-proportional (MEDIUM FIXED)
6=32x18 'full size’, only num. (SPECIAL2)
7=15xVariable prop. Unicode (UNICODE_MEDIUM)
8=31xVariable prop.Unicode (UNICODE_LARGE)
Note: Adding 128 (0x80) to the identifier font, right
alignment is activated, whereas adding 64 (0x40)
centering is activated (always from the top point,
see Figure 35).
Data
Variable
Variable
Optional command data area
End Frame
1
ETX
(0x03)
End of Command
Checksum
1
Variable
7-bit checksum executed for the whole frame.