POSline TPC7030, Programming Manual

Page: 55 / 131

3.11 Keypad commands
CLR_KBD
Purpose
Κ
To clear the keypad buffer.
Syntax
Κ CLR_KBD
Example
Κ
CLR_KBD
Description
Κ
This command will clear keypad buffer.
INKEY$
Purpose
Κ
To read one character from the keypad buffer then remove it.
Syntax
Κ Str$ = INKEY$
Example
Κ
START:
S$=INKEY$
IF S$<>"" THEN
PRINT ASC(S$)
IF ASC(S$)=27 THEN ‘‘ESC key
END
END IF
END IF
GOTO START
…
Description
Κ Str$ is a string variable to be assigned to character read.
INPUT_LEN
Purpose
Κ
To set or get input length when using ““INPUT”” or INPUT_S"
command.
Syntax
Κ X%= INPUT_LEN
INPUT_LEN=A%
Example
Κ
INPUT_LEN=4
PRINT "INPUT STRING:"
A%=INPUT("",S$)
…
PRINT ““Input length:””; INPUT_LEN
Description
Κ A% is an integer variable. When using ““INPUT”” or
““INPUT_S”” command, it can set limit on input length(When
N%=0 indicating not limit).
X% is an integer variable, indicating the input length.
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Programming Manual Ver. 1.00 54/131