from machine import Pin
import utime

# ① 以列表推導式批次初始化 7 個線段腳位（GP2~GP8 對應 a~g）
segments = [Pin(i, Pin.OUT) for i in range(2, 9)]

# ② 共陽極段碼字典：Key 為數字字元，Value 為 [a,b,c,d,e,f,g]（0=亮, 1=滅）
segment_map = {
    '0': [0,0,0,0,0,0,1],
    '1': [1,0,0,1,1,1,1],
    '2': [0,0,1,0,0,1,0],
    '3': [0,0,0,0,1,1,0],
    '4': [1,0,0,1,1,0,0],
    '5': [0,1,0,0,1,0,0],
    '6': [0,1,0,0,0,0,0],
    '7': [0,0,0,1,1,1,1],
    '8': [0,0,0,0,0,0,0],
    '9': [0,0,0,0,1,0,0],
    '-': [1,1,1,1,1,1,0],   # 橫線（錯誤或待機符號）
}

def show_char(char):
    """依字典查表，設定各線段輸出值"""
    code = segment_map.get(char, segment_map['-'])  # 查無此字元則顯示 '-'
    for i, seg in enumerate(segments):
        seg.value(code[i])

def all_off():
    """全滅（共陽極：全部輸出 1）"""
    for seg in segments:
        seg.value(1)

def blink(times=3, interval_ms=200):
    """閃爍效果：亮 → 滅，重複 times 次"""
    for _ in range(times):
        for seg in segments:
            seg.value(0)           # 全亮（共陽極輸出 0）
        utime.sleep_ms(interval_ms)
        all_off()
        utime.sleep_ms(interval_ms)

# ③ 倒數計時：9 → 0
print(">>> 倒數計時開始...")
for count in range(9, -1, -1):
    show_char(str(count))         # 將整數轉字串再查字典
    print(f"顯示：{count}")
    utime.sleep(1)

# ④ 計時結束：閃爍 3 下後全滅
print("計時結束！")
blink(times=3)
all_off()
print("顯示器已關閉")