Matrix Orbital GLK24064-25 Legacy - Manual (Page 26)

GLK24064-25 rev. 06 26
Explanation of the bytes in the file:
(All values below are in hex)
FF FF placeholders for actual EOF
05 font width in pixels
07 font height in pixels
68 first ASCII character defined
70 last ASCII character defined
00 0F offset to definition of first character (h)
05 number of bytes in definition of first character
00 14 offset to definition of second character (i)
03 number of bytes in definition of second character
00 17 offset to definition of third character (j)
04 number of bytes in definition of third character
7F 04 81 80 07 definition of first character
C4 3E 10 definition of second character
02 20 B1 07 definition of third character
6.5 Working with Bitmap Files
Uploading a bitmap is the same as uploading a font file except that the character header information is not
required.
The bitmap file consists of a header followed by the bitmap data. The header format is as follows:
! Placeholder for actual EOF (2 bytes, use 0xFF 0xFF – these bytes will be set to their final value by the
module)
! x size of bitmap (1 byte)
! y size of bitmap (1 byte)
Bitmap data follows with the bits organized vertically from the top left (see Figure 4-1). The last byte may
be padded with zeros.
Aside from the different header, bitmap file operations are identical to those described for font files in
section 6.4.