Matrix Orbital PK202-25 User Manual
Page 28
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
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