Remote-processing CAMBASIC Instrukcja Użytkownika Pobierz pdf (Strona 96)

Commands - 63

INPUT KEYPAD$

Statement

SYNTAX: INPUT KEYP AD$ echo port,variable

INPUT KEYP AD$ echo port,"text" ,variable

INPUT KEYP AD$ echo port, "text" ;variable

PURPOSE: To input data from a keypad. Optionally print text to echo port

REMARK S: The INPUT KEYP AD$ statement is sim ilar to the IN PUT statement in that the program pauses to

accept data from a matrix keypad.

The echo port parameter tells the system where to echo the keys pressed on the keypad. The display

must be previously initialized for an echo.

0 no echo

1 COM1

2 COM2

3-7 no echo

8 Graphics display (RPC-2350 only, no echo on others)

9 DP display

10 LCD display

11 speaker

12-255 no echo

The INPU T KEYP AD$ statement terminates when a carriage return (< CR> ) is received. One of

the keypad keys must be configured to return a < CR> (13 or&D) w hen pressed using the SYS(8)

command. By default, key position 15 returns a < CR> . A < CR> < LF> sequence is sent to the

echo port when a < CR> is sent. On all echo ports, except the LCD display, the line advanc es.

The cursor retur ns back to the beginning of the line on LC D' s.

"text" is optionally printed to the echo port. This is useful as part of a prompt. The character

following the last quotation (") determines if a question mark (?) is printed or not. A com ma (, )

suppresses printing a ? while a semi-colon (;) will print one.

This command must be initialized by ON KEY PAD$. W hen INPUT KEYP AD$ is executed, the

subroutine specified in ON KEYPAD$ is not executed. Even if you use INPUT KE YPAD $ as your

only keypad input, you must have a valid line number specified as part of the ON KEYPAD$

routine.

variable is a string (for example, NAME $) or numeric (for exam ple, WE IGHT). As with the

regular INPUT statement, any string characters entered into a numeric variable prom pts for a redo.

LCD displays do not pr ompt for a redo, but the cursor returns back to the point wh ere it is

requesting data.

RELATED: KEYPA D$, ON KEY PAD$

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Remote-processing CAMBASIC Instrukcja Użytkownika Strona 96