Matrix Orbital PK202-25 - Manual (Page 27)

be defined or redefined at any time by issuing the commands shown in this section. Once defined, they may
be used either by means of the bar graph commands, or by simply issuing one of the ASCII values 0x00 to
0x07 (which is not prefixed by the command byte, 254).
5.1 Command List
5.1.1 Initialize wide vertical bar graph (254 118)
This command defines the 8 special / user characters to be blocks suitable for use in drawing wide (5
pixel) vertical bar graphs. Any previously existing definitions will be lost. Once this command has been
issued, any number of vertical bar graphs may be drawn unless the characters are redefined by another
command.
5.1.2 Initialize narrow vertical bar graph (254 115)
This command defines the 8 special / user characters to be blocks suitable for use in drawing narrow (2
pixel) vertical bar graphs. Any previously existing definitions will be lost. Once this command has been
issued, any number of vertical bar graphs may be drawn unless the characters are redefined by another
command
5.1.3 Draw vertical bar graph (254 61 [column] [height])
Draws a vertical bar graph in [column] having a height of [height] pixels. The height may range from
0 to 20 (0x00 to 0x14) pixels. The necessary characters must first be initialized by either of the commands
shown in section 5.1.1 or 5.1.2, which will determine the width of the graph drawn. Graph may be erased
by drawing a bar graph of height = 0 in the same column.
5.1.4 Initialize horizontal bar graph (254 104)
This command defines the 8 special / user characters to be blocks suitable for use in drawing horizontal
bar graphs. Any previously existing definitions will be lost. Once this command has been issued, any number
of horizontal bar graphs may be drawn unless the characters are redefined by another command.
5.1.5 Draw horizontal bar graph (254 124 [column] [row] [dir] [length])
Draws a horizontal bar graph in [row] starting at [column] with a length of [length] pixels. [row] may
have a value of 0x01 or 0x02, column may range from 0x01 to 0x14 and length may be from 0x00 to 0x64
(0 to 100) if the graph can extend the full width of the screen. Each column is 5 pixels wide (spaces between
the columns don’t count).
[dir] specifies the direction: 0x00 goes from left to right, 0x01 goes from right to left.
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