ak1211 / MyFirstApplication 用赤外線リモコン信号取得と送信用 circuit python プログラム

main.py

# https://ak1211.com/7707 (main.py)
# Copyright 2021 Akihiro Yamamoto
# Licensed under the Apache License, Version 2.0
from digitalio import DigitalInOut, Direction
import board
import pulseio
import supervisor
import sys
import time
import array
import gc

# 受け付けるリモコンパルス数の最低長 
ACCEPT_MIN_IR_PULSES = 40

# IRM 
irm_pulse = pulseio.PulseIn(board.D0, maxlen=2000, idle_state=True)

# PWM
# carrier: 38kHz
# duty cycle: 1/3 = 65536/3 = 21845
pwm = pulseio.PWMOut(board.D1, duty_cycle=21845, frequency=38000, variable_frequency=False)
infrared_led_pulse = pulseio.PulseOut(pwm)

led = DigitalInOut(board.D13)
led.direction = Direction.OUTPUT

# LEDを消灯させる
led.value = 1

def output_pulse_to_console():
    # LEDを点灯させる
    led.value = 0
    # パルス読み込み一時停止
    irm_pulse.pause()
    #
    bytes = array.array('B')
    bytes.append(ord('['))
    for index in range(len(irm_pulse)):
        for ch in str(irm_pulse[index]):
            bytes.append(ord(ch))
        bytes.append(ord(','))
    bytes[len(bytes)-1] = ord(']')
    # 返答
    for ch in bytes:
        sys.stdout.write(chr(ch))
    sys.stdout.write("\r\n")
    # パルス読み込み再開
    irm_pulse.resume()
    # LEDを消灯させる
    led.value = 1

def serial_input_loop():
    inputs = ""
    for x in range(1*5000/1):
        time.sleep(1/5000)
        while supervisor.runtime.serial_bytes_available:
            inputs += sys.stdin.read(1)
    return inputs


while True:
    if (len(irm_pulse) > ACCEPT_MIN_IR_PULSES):
        output_pulse_to_console()

    # 読み込んだパルスを消去する
    irm_pulse.clear()

    # ここで時間待ちのついでにシリアル入力をしておく
    serial_inputs = serial_input_loop()

    # 入力文字列を配列にする
    start = serial_inputs.find('[')
    end = serial_inputs.rfind(']')
    if (end-start) > 1:
        contents = serial_inputs[1+start:end]
        to_output_pulses = array.array( 'H', [int(v.strip()) for v in contents.split(',')] )
        if len(to_output_pulses) > ACCEPT_MIN_IR_PULSES:
            # LEDを点灯させる
            led.value = 0
            # パルス読み込み一時停止
            irm_pulse.pause()
            # 読み込んだパルスを消去する
            irm_pulse.clear()
            # 赤外線リモコン信号送出
            infrared_led_pulse.send(to_output_pulses)
            # パルス読み込み再開
            irm_pulse.resume()
            # 返答
            sys.stdout.write("ok")
            sys.stdout.write("\r\n")
            # LEDを消灯させる
            led.value = 1
        del to_output_pulses
        del contents
    #
    del end
    del start
    del serial_inputs
    gc.collect()