KeypadData

Syntax:

    var = KeypadData

Command Availability:

Available on all microcontrollers.

Explanation:

This function will return a value corresponding to the key that is pressed on the keypad. Note that if two or more keys are pressed, then only one value will be returned. var can have one of the following values:

Value Constant Name Key Pressed

0

  

0

1

  

1

2

  

2

3

  

3

4

  

4

5

  

5

6

  

6

7

  

7

8

  

8

9

  

9

10

KEY_A

A

11

KEY_B

B

12

KEY_C

C

13

KEY_D

D

14

KEY_STAR

Asterisk/Star (*)

15

KEY_HASH

Hash (#)

255

KEY_NONE

None

Example:

    'Program to show the value of the last pressed key on the LCD
    #chip 18F4550, 20

    'LCD connection settings
    #define LCD_IO 4
    #define LCD_WIDTH 20                ;specified lcd width for clarity only.  20 is the default width
    #define LCD_DB4 PORTD.4
    #define LCD_DB5 PORTD.5
    #define LCD_DB6 PORTD.6
    #define LCD_DB7 PORTD.7
    #define LCD_RS PORTD.0
    #define LCD_RW PORTD.1
    #define LCD_Enable PORTD.2

    'Keypad connection settings
    #define KeypadPort PORTB

    'Main loop
    Do
        'Get key
        Temp = KeypadData

        'If a key is pressed, then display it
        If Temp <> KEY_NONE Then
            CLS
            Print Temp
            Wait 100 ms
        End If
    Loop

For more help, see Keypad Overview

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