Matrix Orbital GLK12232-25-WBL - Manual (Page 24)

The header consists of;
• Placeholder for actual EOF (2 bytes, use 0xFF 0xFF - these bytes will be set to their final value by the
module)
• Nominal character width (1 byte)
• Absolute font height (1 byte)
• ASCII value of first character defined in this file (1 byte)
• ASCII value of last character defined in this file (1 byte)
The character list consists of groups of 3 bytes per character;
• Offset to character bitmap (2 bytes)
• Actual width of this character (1 byte)
6.4.1 Font File in Table Form
The table below shows the layout of a font file in table form.
Table 5: File Format
0xFF 0xFF X size Y size Start End O-High O-Low
Width O-High O-Low Width O-High O-Low Width O-High
O-Low Width O-High O-Low Width O-High O-Low Width
O-High O-Low Width Data Data Data Data Data
Data Data Data Data Data Data Data Data
Data Data Data Data Data Data Data Data
Data Data Data Data Data Data Data Data
Data Data Data Data Data Data Data Data
Data Data Data Data Data Data Data Data
Data Data Data Data Data Data Data Data
Data Data Data Data Data Data Data Data
Data Data Data Data Data Data Data Data
Data Data Data Data Data Data Data Data
Data Data Data Data Data
6.4.2 Uploading the File to the Module
The “Upload font” command is used to actually upload the font file. Recall that the syntax for this
command is;
0xFE 0x24 [ref] [file size] [file data]
In this example the file size is 94 bytes (0x5E) and the reference number is 2. The communications
exchange between the host and the module looks like this;
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