variable = Keypad( portBlock)
|variable||Variable to store results (Returns Byte, No String or Single)|
|portBlock||Port block (0 to 15)|
Use this command to read input from a matrix keypad. One port block can be used to read a 4 by 4 keypad input. The keypad rows should be connected to the lower 4 bits of the Port Block, and the keypad columns should be connected to upper 4 bits of the port block.
Pullup resistors (2.2K to 10K) should be connected to the lower 4 bits of the port block. A resistor should be connected even if a row is not being used. Please refer to the diagram below:
A = Keypad(0) ' Read the status of keypad connected to Port Block 0
If no keys are pressed, 255 will be returned. Otherwise, the pressed key’s scan code will be returned.