from machine import Pin, ADC
import time

# ===== Display subsystem: seven segments, driven directly =================
SEG_PINS = [26, 27, 14, 12, 13, 27, 33]      # a, b, c, d, e, f, g
segs = [Pin(n, Pin.OUT) for n in SEG_PINS]

# Bit i of each pattern drives segment i (a=bit0 ... g=bit6).
DIGITS = [
    0b0111111,   # 0: a b c d e f
    0b0000110,   # 1: b c
    0b1011011,   # 2: a b d e g
    0b1001111,   # 3: a b c d g
    0b1100110,   # 4: b c f g
    0b1101101,   # 5: a c d f g
    0b1111101,   # 6: a c d e f g
    0b0000111,   # 7: a b c
    0b1111111,   # 8: all seven
    0b1101111,   # 9: a b c d f g
]

def show(digit):
    pattern = DIGITS[digit]
    for i in range(7):
        seg[i].value((pattern >> i) & 1)  

# ===== Sensing subsystem: one analog input ================================
pot = ADC(Pin(34))
pot.atten(ADC.ATTN_11DB)               # full 0 - 3.3 V range, readings 0 - 4095

# ===== Main program =======================================================
print("Dial Display running. Turn the potentiometer...")

last_digit = -1
while True:
    raw = pot.read()                   # 0 .. 4095
    digit = raw * 10 // 4096           
    if digit != last_digit:
        last_digit = digit
        print("raw =", raw, "-> digit =", digit)
        show(digit)

    time.sleep(0.2)