"""
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Raspberry Pi Pico 7-Segment Display Counter (MicroPython)┃
┃                                                          ┃
┃ A program to demonstrate the use of a 7-segment display  ┃
┃ by implementing an ascending/descending hexadecimal      ┃
┃ counter based on the state of an input switch.           ┃
┃                                                          ┃
┃ Copyright (c) 2023 Anderson Costa                        ┃
┃ GitHub: github.com/arcostasi                             ┃
┃ License: MIT                                             ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
"""

from machine import Pin, ADC
from utime import sleep
import urandom

# 7-segment display layout
#       A
#      ---
#  F |  G  | B
#      ---
#  E |     | C
#      ---
#       D

pins = [
    Pin(2, Pin.OUT),  # A
    Pin(3, Pin.OUT),  # B
    Pin(4, Pin.OUT),  # C
    Pin(5, Pin.OUT),  # D
    Pin(6, Pin.OUT),  # E
    Pin(8, Pin.OUT),  # F
    Pin(7, Pin.OUT),  # G
    Pin(0, Pin.OUT)   # DP (not connected)
]

# Common anode 7-segment display digit patterns
digits = [
    [0, 0, 0, 0, 0, 0, 1, 1], # 0
    [1, 0, 0, 1, 1, 1, 1, 1], # 1
    [0, 0, 1, 0, 0, 1, 0, 1], # 2 
    [0, 0, 0, 0, 1, 1, 0, 1], # 3
    [1, 0, 0, 1, 1, 0, 0, 1], # 4
    [0, 1, 0, 0, 1, 0, 0, 1], # 5
    [0, 1, 0, 0, 0, 0, 0, 1], # 6
    [0, 0, 0, 1, 1, 1, 1, 1], # 7
    [0, 0, 0, 0, 0, 0, 0, 1], # 8
    [0, 0, 0, 1, 1, 0, 0, 1], # 9
    [0, 0, 0, 1, 0, 0, 0, 1], # a
    [1, 1, 0, 0, 0, 0, 0, 1], # b
    [0, 1, 1, 0, 0, 0, 1, 1], # C
    [1, 0, 0, 0, 0, 1, 0, 1], # d
    [0, 1, 1, 0, 0, 0, 0, 1], # E
    [0, 1, 1, 1, 0, 0, 0, 1], # F
]

def reset():
    """Turns off all segments on the 7-segment display."""
    for pin in pins:
        pin.value(1)

reset()

def display_digit(digit):
    """Displays a single hexadecimal digit on the 7-segment display."""
    for j in range(len(pins) - 1):
        pins[j].value(digits[digit][j])

switch = Pin(13, Pin.IN)

potentiometer = ADC(27)

speed = 0.5  # Затримка в секундах

while True:
    pot_value = potentiometer.read_u16()  # Зчитування значення від 0 до 65535
    speed = 0.1 + (pot_value / 65535) * 0.9  # Масштабування до діапазону 0.1 - 1.0 секунд

    random_numbers = [urandom.randint(1, 15) for _ in range(3)]
    average_value = sum(random_numbers) // len(random_numbers)  

    display_digit(average_value)
    
    sleep(speed*5)