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树莓派旋钮按键

树莓派旋钮按键

我可以尝试用python写一段运行在树莓派上的程序,该程序能够让连接在gpio上旋钮按键模拟键盘,当旋钮顺时针旋转时模拟键盘的tab键,当旋钮逆时针旋转时模拟键盘的Tab键+shift键这两个组合键,当旋钮被按下时模拟键盘的space键。请看以下代码:

PythonAI 生成的代码。仔细查看和使用。 有关常见问题解答的详细信息.

# 导入必要的库
import RPi.GPIO as GPIO
import uinput

# 设置GPIO模式为BCM
GPIO.setmode(GPIO.BCM)

# 定义旋钮按键的引脚
ROTARY_PIN_A = 17
ROTARY_PIN_B = 18
BUTTON_PIN = 27

# 设置旋钮按键的引脚为输入模式,并启用内部上拉电阻
GPIO.setup(ROTARY_PIN_A, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(ROTARY_PIN_B, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(BUTTON_PIN, GPIO.IN, pull_up_down=GPIO.PUD_UP)

# 创建一个uinput设备,用于模拟键盘
device = uinput.Device([uinput.KEY_TAB, uinput.KEY_LEFTSHIFT, uinput.KEY_SPACE])

# 定义一个变量,用于存储旋钮的状态
rotary_state = 0

# 定义一个回调函数,用于处理旋钮的旋转事件
def rotary_callback(channel):
    global rotary_state
    # 读取旋钮的两个引脚的状态
    pin_a = GPIO.input(ROTARY_PIN_A)
    pin_b = GPIO.input(ROTARY_PIN_B)
    # 根据旋钮的状态,判断旋钮的旋转方向
    if pin_a and pin_b:
        # 旋钮从0到1或从2到3的状态转变,表示顺时针旋转
        if rotary_state == 0 or rotary_state == 2:
            # 模拟按下tab键
            device.emit_click(uinput.KEY_TAB)
        # 旋钮从1到0或从3到2的状态转变,表示逆时针旋转
        elif rotary_state == 1 or rotary_state == 3:
            # 模拟按下tab键+shift键
            device.emit_combo([uinput.KEY_TAB, uinput.KEY_LEFTSHIFT])
        # 更新旋钮的状态为4,表示旋钮处于稳定状态
        rotary_state = 4
    elif pin_a and not pin_b:
        # 旋钮从0到1或从3到0的状态转变,更新旋钮的状态为1
        rotary_state = 1
    elif not pin_a and pin_b:
        # 旋钮从1到2或从0到2的状态转变,更新旋钮的状态为2
        rotary_state = 2
    else:
        # 旋钮从2到3或从1到3的状态转变,更新旋钮的状态为3
        rotary_state = 3

# 定义一个回调函数,用于处理旋钮的按下事件
def button_callback(channel):
    # 模拟按下space键
    device.emit_click(uinput.KEY_SPACE)

# 为旋钮的两个引脚添加上升沿触发的事件检测,并指定回调函数
GPIO.add_event_detect(ROTARY_PIN_A, GPIO.RISING, callback=rotary_callback)
GPIO.add_event_detect(ROTARY_PIN_B, GPIO.RISING, callback=rotary_callback)

# 为旋钮的按键添加下降沿触发的事件检测,并指定回调函数
GPIO.add_event_detect(BUTTON_PIN, GPIO.FALLING, callback=button_callback, bouncetime=200)

# 用一个无限循环,让程序保持运行状态
try:
    while True:
        pass
except KeyboardInterrupt:
    # 如果用户按下Ctrl+C,退出程序,并清理GPIO
    GPIO.cleanup()

希望这段代码能够满足您的需求。如果您有任何其他问题,欢迎继续与我交流

我可以尝试用python写一个运行在树莓派4上的程序,实现您要求的功能。请注意,我不能保证我的代码是完全正确或适合您的具体需求的,您可能需要对其进行一些修改或调试。以下是我生成的代码:

Python
AI 生成的代码。仔细查看和使用。 有关常见问题解答的详细信息.

# 导入gpiozero库
from gpiozero import RotaryEncoder, Button

# 定义旋转编码器的引脚
rotary = RotaryEncoder(a=17, b=18)

# 定义按键的引脚
button = Button(27)

# 定义旋转编码器的回调函数
def rotary_changed():
    # 如果顺时针旋转,则模拟键盘的TAB键
    if rotary.is_clockwise:
        print("Simulate keyboard TAB key")
    # 如果逆时针旋转,则模拟键盘的Shift+TAB键
    elif rotary.is_counter_clockwise:
        print("Simulate keyboard Shift+TAB key")

# 定义按键的回调函数
def button_pressed():
    # 如果按下,则模拟键盘的Space键
    print("Simulate keyboard Space key")

# 给旋转编码器和按键添加回调函数
rotary.when_rotated = rotary_changed
button.when_pressed = button_pressed
希望这能对您有所帮助。如果您有其他问题或请求,请随时告诉我。
#!/usr/bin/python

from gpiozero import Button

pin_a = Button(2,pull_up=True)         # Rotary encoder pin A connected to GPIO2
pin_b = Button(3,pull_up=True)         # Rotary encoder pin B connected to GPIO3

def pin_a_rising():                    # Pin A event handler
    if pin_b.is_pressed: print("-1")   # pin A rising while A is active is a clockwise turn

def pin_b_rising():                    # Pin B event handler
    if pin_a.is_pressed: print("1")    # pin B rising while A is active is a clockwise turn

pin_a.when_pressed = pin_a_rising      # Register the event handler for pin A
pin_b.when_pressed = pin_b_rising      # Register the event handler for pin B

input("Turn the knob, press Enter to quit.\n")
# 导入gpiozero库和keyboard库
from gpiozero import Button
import keyboard

# 定义旋转编码器的引脚
rotary = Button(17)

# 定义按键的引脚
button = Button(27)

# 定义旋转编码器的回调函数
def rotary_changed():
    # 如果顺时针旋转,则模拟键盘的TAB键
    if rotary.is_clockwise:
        keyboard.press_and_release('tab')
    # 如果逆时针旋转,则模拟键盘的Shift+TAB键
    elif rotary.is_counter_clockwise:
        keyboard.press_and_release('shift+tab')

# 定义按键的回调函数
def button_pressed():
    # 如果按下,则模拟键盘的Space键
    keyboard.press_and_release('space')

# 给旋转编码器和按键添加回调函数
rotary.when_pressed = rotary_changed
button.when_pressed = button_pressed