# https://wokwi.com/projects/443315705910393857
from machine import Pin, Timer
import time

pins_segment = [None] * 8
pins_digit = [None] * 8

# 共陽數碼管段碼(gfedcba 順序)
digit_codes = {
    0: 0b11000000, 1: 0b11111001, 2: 0b10100100, 3: 0b10110000, 4: 0b10011001,
    5: 0b10010010, 6: 0b10000010, 7: 0b11111000, 8: 0b10000000, 9: 0b10010000,
}

def segmentize(num):
  return (
    num % 10, (num // 10) % 10, (num // 100) % 10, (num // 1000) % 10, 
    (num // 10000) % 10, (num // 100000) % 10, (num // 1000000) % 10, (num // 10000000) % 10
  )

#Timer Function Callback
def TimerTick(t):
  global counter, led
  counter += 1
  led.toggle()

# 定義引腳(段腳 + 位選腳)
for i in range(8):
  pins_segment[i] = Pin(i, Pin.OUT) # a, b, c, d, e, f, g, dp

for i in range(8):
  pins_digit[i] = Pin(i+8, Pin.OUT) # 位8(最左側數碼管)/位1(最右側數碼管)

# 要顯示的數位：
counter = 12345678

led = Pin('LED', Pin.OUT)

tim0 = Timer()
# tim0.init(period=200, mode=Timer.PERIODIC, callback=TimerTick)
tim0.init(freq=5, mode=Timer.PERIODIC, callback=TimerTick)

try:
    while True:
        digits_to_show = segmentize(counter)
        for digit_idx in range(8):  # 遍歷4個數碼管
            # 步驟1：關閉所有位選(避免串擾)
            for pin in pins_digit:
                pin.off()  # 共陽數碼管，off為低電平，關閉
            
            # 步驟2：設置當前數碼管的段碼
            code = digit_codes[digits_to_show[digit_idx]]
            for i in range(7):  # 處理a - g段(共7段)
                pins_segment[i].value((code >> i) & 1)
            pins_segment[7].value(1)  # dp默認不亮(高電平)
            
            # 步驟3：打開當前位元選，顯示該數碼管
            pins_digit[digit_idx].on()  # 共陽數碼管，on為高電平，點亮
            
            # 掃描間隔(視覺暫留，可調整)
            # time.sleep_us(500)
            time.sleep_ms(500)

except KeyboardInterrupt:
    # 中斷時關閉所有引腳
    for pin in pins_segment + pins_digit:
        pin.off()