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Keypad Programming 6-7MN1854
Value: N/A
Units: N/A
Range: i=1–28
The FK command allows you to define a function key within your program. The FK command pauses
processing until the buttons you have “armed” are pressed. The number of the button pressed is assigned to
the system variable, (FKEY). You can then manipulate or directly use this variable to branch to other
routines or make other decisions. FK allows the programmer to redefine the keypad’s function keys as
operator menu selection buttons. You can even write your program with menus that look and feel like our
setup menus. The returned values of the FKEY’s are:
Note: 24, the ESC key, cannot be assigned since it stops the program.
FK
Function Key syntax – FKi,i,..,i
Example:
FK
1,2,3,4
GS(FKEY)
Pauses command execution until F1, F2, F3, or RUN is pressed on the keypad. (FKEY) is assigned a value
of 1–4. Subroutine 1–4 is called with the GS(gosub) command.
Figure 6-1 shows how to use the keypad function keys as an operator interface. A 3–screen menu program
is provided
1. Write a menu message (MS) on the keypad display above the corresponding function keys.
2. Use the FK command to pause command processing until the operator selects a valid function key. Only
keys explicitly defined in the FK statement are considered valid.
3. Gosub to the appropriate program.
F1
=1
F2
=2
F3
=3
RUN
=4
EDIT
=5
HELP
=6
COPY
=7
DEL
=8
1=9
2=10 3=11
4=14 5=15 6=16
7=19 8=20 9=21
ESC
0=25
±
ALPHA ENTER
,
.
u
↓
→
↑
=12 =13
=17 =18
=22 =23
=27 =28=26
=Not
Used