LK202-24-USB rev 1
29
Command Syntax
Default
Notes
Poll keypad
FE 26
254 38
254 '&'
n/a
Returns buffered key presses to application.
Returns 0x00 if no key presses. High order bit
set unless this is the last/only key press.
Set debounce time
FE 55 [time]
254 85 [time]
254 'U' [time]
52 ms
R
Resolution: 1 = 0.6554 ms [time] is a numeric
multiplier.
6.6 Bar Graphs and Special Characters
The commands in this section are used to define and display bar graphs and special characters.
Table 6-3 Bar Graph and Special Character Commands
Command Syntax
Notes
Initialize thick vertical
bar graph
FE 76
254 118
254 'v'
Initializes the user character set to make wide vertical bar
graphs.
Initialize thin vertical
bar graph
FE 73
254 115
254 's'
Initializes the user character set to make narrow vertical bar
graphs.
Initialize horizontal
bar graph
FE 68
254 104
254 'h'
Initializes the user character set to make horizontal bar
graphs.
Define custom
character
FE 4E [c][8 bytes]
254 78 [c][8 bytes]
254 'N' [c][8 bytes]
Defines one of 8 custom "user" characters. Character
number is [c] between 0x00 and 0x07. The 8 bytes are
described in section 4.1.6.
Draw vertical bar
graph
FE 3D [col][length]
254 61 [col][length]
254 '=' [col][length]
Draws a vertical bar graph at column [col] of length [length].
Length is measured in pixels (0x00 to 0x14). User must first
use the 'v' or 's' command to initialize characters.
Draw horizontal bar
graph
FE 7C [c][r][d][length]
254 124 [c][r][d][length]
254 '|' [c][r][d][length]
Draws a horizontal bar graph starting at column [c] on row [r]
with direction [d] (0 is right, 1 is left) of length [length]. Length
is measured in pixels (0x00 to 0x64 if starting in column 1).
User must first use the 'h' command to initialize characters.
