keypadraw - Anobium/Great-Cow-BASIC-Help GitHub Wiki

KeypadRaw

Syntax:

    largevar = KeypadRaw

Command Availability:

Available on all microcontrollers.

Explanation:

This function will return a 16 bit value, in which each bit corresponds to a key on the keypad. If the key is pressed its bit will hold 1, and if it is released its bit will contain a 0.

This table shows the key that each bit corresponds to:

Bit Key Position (row, col) Common Key Symbol
15 1,1 1
14 1,2 2
13 1,3 3
12 1,4 A
11 2,1 4
10 2,2 5
9 2,3 6
8 2,4 B
7 3,1 7
6 3,2 8
5 3,3 9
4 3,4 C
3 4,1 *
2 4,2 0
1 4,3 #
0 4,4 D

Example:

    'Program to show the keypad status using LEDs
    #chip 16F877A, 20

    'Keypad connection settings
    #define KeypadPort PORTB

    'LEDs
    #define LED1 PORTC
    #define LED2 PORTD
    Dir LED1 Out
    Dir LED2 Out

    'Declare a 16 bit variable for the key value
    Dim KeyStatus As Word

    'Main loop
    Do
        'Get key
        KeyStatus = KeypadRaw

        'Display
        LED1 = KeyStatus_H 'High Byte
        LED2 = KeyStatus 'Low Byte
    Loop

For more help, see Keypad Overview

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