GLT24064R-1U-USB-TCI Matrix Orbital, GLT24064R-1U-USB-TCI Datasheet - Page 29

• Manufacturer Part Number: GLT24064R-1U-USB-TCI
• Description: DISPLAY
• Manufacturer: Matrix Orbital

Specifications of GLT24064R-1U-USB-TCI

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The character data is a binary graphical representation of each glyph in a font. Each character is drawn
on a grid containing as many rows as the height specified in the header and as many columns as the
width specified in the character table. Cells are drawn by writing a one in their location and cleared by
setting a value of zero. Starting at the top left, moving right, then down, eight of these cells form a
character data byte. When all cells are accounted for, zeroes may be added to the last byte to complete
it. A sample of an ‘h’ glyph is shown above. The data for the ‘i’ and ‘j’ characters will follow to complete
the custom font file displayed below.
4.1 Upload a
Bitmap File
Upload a bitmap to a graphic display. To create a bitmap see the Bitmap File Creation section, for upload protocol
see the File Upload Protocol or XModem Upload Protocol entries. Start screen is ID 1.
ID
Size
Data
4.2 Draw a Bitmap
from Memory
Draw a previously uploaded bitmap from memory. Top left corner must be specified for drawing.
ID
X Position
Y Position
*Note:
from firmware revision 8.1 onward. Please query your display revision to ensure this command is issued correctly.
23
6.4 Bitmaps
To accommodate additional memory, Font and Bitmap IDs have been increased to 2 bytes and size to 4
2 bytes*, unique bitmap identification number, LSB first
4 bytes*, size of the entire bitmap file, LSB first
variable length, bitmap file data, see Bitmap File Creation example
2 bytes*, unique bitmap identification number
1 byte, leftmost coordinate of bitmap
1 byte, topmost coordinate of bitmap
Dec
Hex
ASCII
Dec
Hex
ASCII
254 94
FE 5E
■ ^
254 98
FE 62
■ b
Character Table
Character Data
Header
ID Size Data
ID Size Data
ID Size Data
ID X Position Y Position
ID X Position Y Position
ID X Position Y Position
Table 23: Example Font File
h
h
i
j
i
j
132 45 152 198 32
16 49 25 96
67 36 184
5 7 72 74
0 13 5
0 18 3
0 21 4