Matrix-orbital LK204-24-USB Manual do Utilizador descarregar pdf (Página 40)

Command Syntax Default Notes

Auto transmit key presses

FE 41

254 65

254 “A”

Sets auto transmit

mode for keypad.

Key presses are

transmitted to

host without

polling.

Auto transmit key presses

off

FE 4F

254 79

254 “O”

off

Up to 10 key-

presses buffered

until polled.

Clear key buffer FE 45

254 69

254 “E”

n/a Clear unread key-

presses.

Poll keypad FE 26

254 38

254 “&”

n/a Returns buffered

keypresses to

application. Re-

turns 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

Resolution: 1 =

0.6554 ms [time]

is a numeric mul-

tiplier.

8.6 Bar Graphs and Special Characters

The commands in this section are used to deﬁne and display bar graphs and special characters.

Table 30: Bar Graphs and Special Characters

Command Syntax Notes

Initialize thick vertical bar

graph

FE 76

254 118

254 “V”

Initialize the user character set to

make wide vertical bar graphs.

Initialize thin vertical bar

graph

FE 73

254 115

254 “s”

Initialize the user character set to

make narrow vertical bar graphs.

Initialize horizontal bar

graph

FE 68

254 104

254 “h”

Initialize the user character set to

make horizontal bar graphs.

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