• 進階程式設計(1)

實作：內建輸入與外接輪出

• 講義

• • 實作

  請用「內建輸入裝置」的「鍵盤」，使用按鍵「up」，控制「外接輸出裝置」的「LED燈」亮。
  請用「內建輸入裝置」的「鍵盤」，使用按鍵「down」，控制「外接輸出裝置」的「LED燈」不亮。

  • 接線

  

  • 程式

  #+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  #|R|a|s|p|b|e|r|r|y|P|i|.|c|o|m|.|t|w|
  #+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  # Copyright (c) 2016, raspberrypi.com.tw
  # All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  #
  # Author : sosorry
  # Date   : 06/22/2014
  # Revised by Jean 02/20/2025
  
  import RPi.GPIO as GPIO    
  import time
  from pynput.keyboard import Key
  from pynput.keyboard import Listener
  
  GPIO.setmode(GPIO.BOARD)  
  LED_PIN = 12
  GPIO.setup(LED_PIN, GPIO.OUT)
  
  def on_press(key):
      print('{0} pressed'.format(key))
  
  def on_release(key):
      print('{0} release'.format(key))
      if key == Key.up:
          print("LED is on")
          GPIO.output(LED_PIN, GPIO.HIGH)
      if key == key.down:
          print("LED is off")
          GPIO.output(LED_PIN, GPIO.LOW)
      if key == Key.esc:
          # Stop listener
          GPIO.cleanup() 
          return False
  
  # Collect events until released
  with Listener(
          on_press=on_press,
          on_release=on_release) as listener:
      listener.join()