Owner's manual

5.1.6 Define custom character (254 78 [c] [8 bytes])
The display allows up to 8 user defined (custom) characters. These characters occupy the first 8 (0x00
to 0x07) places in the character set.
Custom characters occupy a 5x8 pixel matrix. Built in characters are 5x8.
The characters are defined by issuing the command: 254 78 [c], followed by 8 bytes to define the
character. [c] is the character number (0x00 to 0x07). The 8 bytes are mapped as shown below;
Table 10: 8 Byte Map
MSB LSB
* * * 1 2 3 4 5 Data Byte 1
* * * 6 7 8 9 10 Data Byte 2
* * * 11 12 13 14 15 Data Byte 3
* * * 16 17 18 19 20 Data Byte 4
* * * 21 22 23 24 25 Data Byte 5
* * * 26 27 28 29 30 Data Byte 6
* * * 31 32 33 34 35 Data Byte 7
* * * 36 37 38 39 40 Data Byte 8
A "1" bit indicates an on (black) pixel, a "0" bit indicates an off (clear) pixel.
Once defined, a character is displayed simply by issuing a value (0x00 to 0x07) corresponding to the
character number. The character will be laid out as follows;
Table 11: Character Values
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25
26 27 28 29 30
31 32 33 34 35
36 37 38 39 40
NOTE Custom characters will be erased if any of the "Initialize bar graph" commands
are issued.
Matrix Orbital PK202-25 24