from machine import Pin
import time

# Define the button pins
button_toggle1 = Pin(2, Pin.IN, Pin.PULL_DOWN)
button_toggle2 = Pin(3, Pin.IN, Pin.PULL_DOWN)
button_toggle3 = Pin(4, Pin.IN, Pin.PULL_DOWN)
button_toggle4 = Pin(5, Pin.IN, Pin.PULL_DOWN)
button_toggle5 = Pin(6, Pin.IN, Pin.PULL_DOWN)
button_toggle6 = Pin(7, Pin.IN, Pin.PULL_DOWN)
button_clear = Pin(10, Pin.IN, Pin.PULL_DOWN)
button_print = Pin(17, Pin.IN, Pin.PULL_DOWN)

# Binary array representing 6-dot Braille
binary_array = [0, 0, 0, 0, 0, 0]

# Braille mapping dictionary (Braille dot patterns to alphabets)
braille_dict = {
    (1, 0, 0, 0, 0, 0): 'A',
    (1, 1, 0, 0, 0, 0): 'B',
    (1, 0, 0, 1, 0, 0): 'C',
    (1, 0, 0, 1, 1, 0): 'D',
    (1, 0, 0, 0, 1, 0): 'E',
    (1, 1, 0, 1, 0, 0): 'F',
    (1, 1, 0, 1, 1, 0): 'G',
    (1, 1, 0, 0, 1, 0): 'H',
    (0, 1, 0, 1, 0, 0): 'I',
    (0, 1, 0, 1, 1, 0): 'J',
    (1, 0, 1, 0, 0, 0): 'K',
    (1, 1, 1, 0, 0, 0): 'L',
    (1, 0, 1, 1, 0, 0): 'M',
    (1, 0, 1, 1, 1, 0): 'N',
    (1, 0, 1, 0, 1, 0): 'O',
    (1, 1, 1, 1, 0, 0): 'P',
    (1, 1, 1, 1, 1, 0): 'Q',
    (1, 1, 1, 0, 1, 0): 'R',
    (0, 1, 1, 1, 0, 0): 'S',
    (0, 1, 1, 1, 1, 0): 'T',
    (1, 0, 1, 0, 0, 1): 'U',
    (1, 1, 1, 0, 0, 1): 'V',
    (0, 1, 0, 1, 1, 1): 'W',
    (1, 0, 1, 1, 0, 1): 'X',
    (1, 0, 1, 1, 1, 1): 'Y',
    (1, 0, 1, 0, 1, 1): 'Z'
}

def set_value(index):
    binary_array[index] = 1
    time.sleep(0.2)  # Debounce delay

def set_clear():
    for i in range(len(binary_array)):
        binary_array[i] = 0
    time.sleep(0.2)

def print_braille_character():
    braille_tuple = tuple(binary_array)
    character = braille_dict.get(braille_tuple, '?')  # '?' for undefined patterns
    print("Braille Alphabet:", character)

prev_button_state = 0  # Tracks previous state of the print button

def check_buttons():
    global prev_button_state

    if button_toggle1.value():
        set_value(0)
    if button_toggle2.value():
        set_value(1)
    if button_toggle3.value():
        set_value(2)
    if button_toggle4.value():
        set_value(3)
    if button_toggle5.value():
        set_value(4)
    if button_toggle6.value():
        set_value(5)
    if button_clear.value():
        set_clear()

    # Edge detection: Print only when button goes from 0 to 1 (press event)
    current_button_state = button_print.value()
    if current_button_state == 1 and prev_button_state == 0:
        print_braille_character()
        set_clear()
        time.sleep(0.3)

    prev_button_state = current_button_state  # Update state for next iteration

while True:
    check_buttons()