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+import rp2
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+from machine import Pin
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+import time
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+
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+class TM1637:
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+ # 割り当て可能なステートマシンID管理
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+ _available_ids = list(range(8))
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+
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+ # セグメントデータ定義 (Cコードの digit_seg / letter_seg に対応)
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+ _DIGIT_SEG = [0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f]
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+ _LETTER_SEG = {
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+ 'A': 0x77, 'b': 0x7c, 'C': 0x39, 'd': 0x5e, 'E': 0x79, 'F': 0x71,
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+ 'G': 0x3d, 'H': 0x76, 'i': 0x04, 'J': 0x0e, 'L': 0x38, 'n': 0x54,
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+ 'o': 0x5c, 'P': 0x73, 'q': 0x67, 'r': 0x50, 'S': 0x6d, 't': 0x78,
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+ 'u': 0x1c, 'y': 0x6e, '-': 0x40, ' ': 0x00
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+ }
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+
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+ # PIOプログラム定義
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+ @rp2.asm_pio(
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+ out_init=(rp2.PIO.IN_HIGH),
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+ set_init=(rp2.PIO.IN_HIGH),
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+ sideset_init=(rp2.PIO.OUT_HIGH),
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+ out_shiftdir=rp2.PIO.SHIFT_RIGHT,
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+ autopull=False,
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+ fifo_join=rp2.PIO.JOIN_TX
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+ )
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+ def _tm1637_pio():
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+ wrap_target()
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+ # --- Start Condition ---
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+ pull(block)
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+ set(pindirs, 0b00) # SDA/SCL input
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+ nop() [7]
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+ set(pindirs, 0b01) # SDA output/SCL input
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+ set(pins, 0) # SDA is Low
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+ nop() [7]
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+ set(pindirs, 0b11) # SDA/SCL output
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+ set(x, 7) .side(0) # CLK is Low
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+ jmp("output")
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+
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+ label("byte_loop")
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+ set(x, 7) .side(0) # CLK is Low
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+ pull(block)
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+
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+ label("output")
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+ nop() [3]
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+ out(pins, 1) [4] # LSB output
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+ nop() .side(1) # CLK is High
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+ nop() [7]
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+ nop() .side(0) # CLK is Low
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+ jmp(x_dec, "output")
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+
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+ # --- ACK Check ---
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+ set(pindirs, 0b10) [7] # SDA input/SCL output
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+ nop() .side(1) # SCL = High
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+ jmp(pin, "nack") # SDA High (NACK) なら分岐
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+ jmp("ack")
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+
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+ label("nack")
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+ irq(rel(0)) # NACK通知
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+
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+ label("ack")
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+ nop() [6]
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+ nop() .side(0) # CLK is Low (ACK cycle end)
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+ set(pindirs, 0b11) [7] # SDA/SCL Output
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+ out(x, 1) # 9bit目を読み取って判定
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+ jmp(not_x, "byte_loop") # 0なら次のバイトへ
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+
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+ # --- Stop Condition ---
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+ set(pins, 0) [7] # SDA is Low
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+ nop() .side(1) # SCL is High
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+ nop() [7]
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+ set(pindirs, 0b00) [7] # SDA/SCL Input (STOP)
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+ wrap()
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+
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+ def __new__(cls, *args, **kwargs):
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+ if not cls._available_ids:
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+ raise RuntimeError("Maximum TM1637 instances (8) reached")
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+ instance = super().__new__(cls)
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+ instance.sm_id = cls._available_ids.pop(0)
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+ return instance
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+
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+ def __init__(self, sda_pin, columns=6, contrast=3):
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+ # SDAの次のピンをSCLとする仕様を再現 (sda_base_pin + 1)
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+ self.sda_pin = Pin(sda_pin, Pin.IN, pull=Pin.PULL_UP)
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+ self.scl_pin = Pin(sda_pin + 1, Pin.IN, pull=Pin.PULL_UP)
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+ self.columns = columns
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+
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+ # PIO初期化 (2MHz)
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+ self.sm = rp2.StateMachine(
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+ self.sm_id,
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+ self._tm1637_pio,
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+ freq=2000000,
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+ sideset_base=self.scl_pin,
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+ set_base=self.sda_pin, # SDA(bit0) & SCL(bit1) をまとめて制御
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+ out_base=self.sda_pin,
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+ jmp_pin=self.sda_pin
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+ )
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+ self.sm.active(1)
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+
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+ # 初期表示設定
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+ self.clear()
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+ self.set_contrast(contrast)
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+
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+ def _send_cmd(self, data, keep_going=False):
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+ # 9ビット目に「終了(1)」か「継続(0)」のフラグを立てる
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+ val = (data & 0xFF) | (0 if keep_going else 0x100)
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+ self.sm.put(val)
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+
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+ def set_contrast(self, level):
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+ # 0x88 (Display ON) | 0~7
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+ cmd = 0x88 | (level & 0x07)
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+ self._send_cmd(cmd)
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+
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+ def _chr_to_seg(self, char):
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+ if '0' <= char <= '9':
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+ return self._DIGIT_SEG[int(char)]
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+ return self._LETTER_SEG.get(char, 0x00)
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+
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+ def show_str(self, s):
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+ # 文字列を解析してセグメントデータのリストを作成
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+ segments = []
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+ i = 0
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+ s_len = len(s)
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+
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+ # カラム数または文字列が終わるまでループ
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+ while i < s_len and len(segments) < self.columns:
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+ char = s[i]
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+ base_seg = self._chr_to_seg(char)
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+
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+ # 次の文字が存在し、かつドットかコロンの場合
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+ if (i + 1) < s_len and s[i + 1] in ('.', ':'):
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+ base_seg |= 0x80 # 8ビット目(ドット)を立てる
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+ i += 1 # ドット文字分インデックスを進める（スキップ）
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+
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+ segments.append(base_seg)
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+ i += 1
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+
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+ # 2. 生成したデータを出力
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+ # データセット（自動アドレスインクリメント）
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+ self._send_cmd(0x40) # TM1637_AUTOINC
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+ # アドレス設定 (0)
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+ self._send_cmd(0xC0, keep_going=True) # TM1637_ADDRSET
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+
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+ # リストの内容を送信
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+ for j, seg in enumerate(segments):
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+ # 最後かどうかを判定 (リストの最後 かつ カラム最大)
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+ is_last = (j == len(segments) - 1)
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+ self._send_cmd(seg, keep_going=not is_last)
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+
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+ def clear(self):
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+ self.show_str(' ' * self.columns)
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+
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+ def release(self):
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+ self.sm.active(0)
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+ if self.sm_id not in self.__class__._available_ids:
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+ self.__class__._available_ids.append(self.sm_id)
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+ self.__class__._available_ids.sort()
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Satoshi Yoneda