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大家好，我正在使用树莓派、一些按钮和一些 python 构建一个照片亭。我不是程序员，但到目前为止我已经糊涂了。

现在，我有如下所示的脚本。我正在尝试使用连接到 Raspberry Pi GPIO 的按钮来触发按键以控制照片幻灯片。

就目前而言，我有按钮工作（带去抖动），当它们只打印“按钮 1”等时。但是当我为每个按钮的功能添加一条 XTE 线时，去抖动停止工作，每个按钮都有 3-4 次点击按。

任何人都知道我怎样才能让这个工作？或者，如果有不同/更好的方法将 GPIO 信号转换为按键？（我尝试了一段时间的 Uinput，但没有奏效）

提前致谢。

#!/usr/bin/env python


### IMPORTS ###
import os                           # Allows us to run console commands and programs
from time import sleep                        # Allows us to call the sleep function to slow down our loop
import datetime                           # Allows us to look at the time
import RPi.GPIO as GPIO                        # Allows us to call our GPIO pins and names it just GPIO
GPIO.setmode(GPIO.BCM)                        # Set's GPIO pins to BCM GPIO numbering

b1count = 1
b2count = 1
b3count = 1

### GPIO SETUP ###
GPIO.setup(23, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)            # Set input pin to use the internal pull down resistor
GPIO.setup(24, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)            # Set input pin to use the internal pull down resistor
GPIO.setup(25, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)            # Set input pin to use the internal pull down resistor


### BUTTON PRESS FUNCTIONS ###
def Input_1(channel):
    os.system('xte "key q"')                     # Xte converting button Presses into Keystrokes.
    global b1count                        # Imports global variable set above
    now = datetime.datetime.now()                  # What time is it now?
    print ' - Button 1 - %r - %r' % (b1count, now.strftime("%H:%M:%S.%f"))   # Prints which button was pressed, how many times, and timestamps it
    b1count = b1count+1                        # Increments button count


def Input_2(channel):
    os.system('xte "key h"')                     # Xte converting button Presses into Keystrokes.
    global b2count                        # Imports global variable set above
    now = datetime.datetime.now()                  # What time is it now?
    print ' - Button 2 - %r - %r' % (b2count, now.strftime("%H:%M:%S.%f"))   # Prints which button was pressed, how many times, and timestamps it
    b2count = b2count+1                        # Increments button count

def Input_3(channel):
    os.system('xte "key v"')                     # Xte converting button Presses into Keystrokes.
    global b3count                        # Imports global variable set above
    now = datetime.datetime.now()                  # What time is it now?
    print ' - Button 3 - %r - %r' % (b3count, now.strftime("%H:%M:%S.%f"))   # Prints which button was pressed, how many times, and timestamps it
    b3count = b3count+1                        # Increments button count


### BUTTON PRESS DETECTION ###
### Does a Callback to the appropriate Input function.  Also debounces to prevent clicking the button multiple times a second.
GPIO.add_event_detect(23, GPIO.FALLING, callback=Input_1, bouncetime=1000)   # Waiting for Button 1 to be pressed.
GPIO.add_event_detect(24, GPIO.FALLING, callback=Input_2, bouncetime=1000)   # Waiting for Button 2 to be pressed.
GPIO.add_event_detect(25, GPIO.FALLING, callback=Input_3, bouncetime=1000)   # Waiting for Button 3 to be pressed.


### FEH -D - Slideshow -Z - Zooms -Y Hides Pointer -F Fullscreen -r loads all images in the following directory###
os.system('feh -D 0.25 -Z -Y -F -r /home/pi/Desktop/Pics/')         # Runs Feh Image Viewer with some command line arguments.


### Starts a neverending loop otherwise the script will just quit.
while True:
    print "Waiting for input."                     # Insert Random Loop Junk
    sleep(60);                           # Sleeps for a minute to save CPU cycles.  Any interrupt will break this.

GPIO.cleanup()
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