# Describe the layout used in the keyboard
#
import board
from digitalio import Pull

from kmk.scanners import DiodeOrientation
col_pins = (board.GP26,board.GP27,board.GP28,board.GP29)
row_pins = (board.GP22,board.GP20,board.GP23,board.GP21)


diode_orientation = DiodeOrientation.ROW2COL

from digitalio import DigitalInOut, Direction, Pull

def check_key():
    """ Check if a key is pressed and return True if so.
        Scan all the keys only once, and return False if nothing where pressed.
        """
    if DiodeOrientation == DiodeOrientation.ROW2COL:
        inputs = row_pins
        outputs = col_pins
    else:
        inputs = col_pins
        outputs = row_pins

    for in_pin in inputs:
        with DigitalInOut(in_pin) as in_io:
            in_io.direction = Direction.INPUT
            in_io.pull = Pull.DOWN

            for out_pin in outputs:
                with DigitalInOut(out_pin) as out_io:
                    out_io.direction = Direction.OUTPUT
                    out_io.value = True
                    result = in_io.value

                    if result:
                        return result
    return False

def set_keyboard(keyboard):
    """ Initialize the kmk keyboard with the values defined here.
    """
    keyboard.row_pins = row_pins
    keyboard.col_pins = col_pins
    keyboard.diode_orientation = diode_orientation