GPIO 引脚在我的程序中途不再工作

Question

所以，我正在 python 在我的 pi 上编程。通过 cwiid 库，我正在连接我的 wii 控制器。这很好用。

但是，在我的 wii 控制器通过蓝牙连接后，LED 突然不工作了。同一行代码在连接之前有效，但在连接之后不再有效。这怎么可能？

我的完整代码：

if __name__ == '__main__':
from sys import path

path.append("..")


import RPi.GPIO as GPIO  
from time import sleep  
import os
import cwiid
from MotorPwm2 import MotorPwm
from GPIOFuckUp import GPIOFuckUp
from Basis import Basis

GPIOFuckUp()

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)

motor = MotorPwm([10, 9, 8, 7])
basis = Basis()
startbool = False

running = True

left_light = 21
right_light = 20
left_siren = 16
right_siren = 26

GPIO.setup(left_light, GPIO.OUT)
GPIO.setup(right_light, GPIO.OUT)
GPIO.setup(left_siren, GPIO.OUT)
GPIO.setup(right_siren, GPIO.OUT)

left_pin = GPIO.PWM(left_light, 1000)
right_pin = GPIO.PWM(right_light, 1000)
left_pin_s = GPIO.PWM(left_siren, 1000)
right_pin_s = GPIO.PWM(right_siren, 1000)

left_pin.start(100)
right_pin.start(100)
left_pin_s.start(0)
right_pin_s.start(0)

# Code above works. Leds turn on, with no problems.

def turn_on_left():
    dim_left(100)

def turn_on_right():
    dim_right(100)

def turn_on_lefts():
    dim_lefts(100)

def turn_on_rights():
    dim_rights(100)

def turn_on():
    print 'aan'
    dim_left(100)
    dim_right(100)

def turn_off_lefts():
    dim_lefts(0)

def turn_off_rights():
    dim_rights(0)

def turn_off_left():
    dim_left(0)

def turn_off_right():
    dim_right(0)

def turn_off():
    dim_left(0)
    dim_right(0)

def dim(percentage):
    dim_left(percentage)
    dim_right(percentage)

def dim_left(percentage):
    left_pin.ChangeDutyCycle(percentage)
    print 'left'

def dim_right(percentage):
    right_pin.ChangeDutyCycle(percentage)
    print 'right'

def dim_lefts(percentage):
    left_pin_s.ChangeDutyCycle(percentage)

def dim_rights(percentage):
    right_pin_s.ChangeDutyCycle(percentage)

def siren_loop():
    while running:
        dim_lefts(100)
        dim_rights(100)
        sleep(0.05)

        turn_off_lefts()
        turn_off_rights()
        sleep(0.05)

        dim_rights(100)
        sleep(0.05)

        turn_on_rights()
        sleep(0.05)

        dim_lefts(100)
        sleep(0.05)

        dim_lefts(0)
        sleep(0.05)

# Def things above also work. Copied the code in another file just to try 
 the leds, and that also worked. 


button_delay = 0.1

print 'Press 1 + 2 on your Wii Remote now ...'

# Here the controller is connecting. After it is connected the leds turn of
# Before the following print lines are printed.

# Connect to the Wii Remote. If it times out
# then quit.
try:
    wii = cwiid.Wiimote()
    #GPIO.output(PIN_LED, 0)

except RuntimeError:
    print "Error opening wiimote connection"
    #GPIO.output(PIN_LED, 0)
    # Uncomment this line to shutdown the Pi if pairing fails
    os.system("sudo reboot")
    quit()

print 'Wii Remote connected...\n'
print 'Press some buttons!\n'
print 'Press PLUS and MINUS together to disconnect and quit.\n'


wii.rpt_mode = cwiid.RPT_BTN


while True:
    buttons = wii.state['buttons']

    # If Plus and Minus buttons pressed
    # together then rumble and quit.
    if (buttons - cwiid.BTN_PLUS - cwiid.BTN_MINUS == 0):
        print '\nClosing connection ...'
        wii.rumble = 1
        #GPIO.output(PIN_LED, 1)
        sleep(1)
        wii.rumble = 0
        #GPIO.output(PIN_LED, 0)
        os.system("sudo reboot")
        exit(wii)


   # Button presses below work and print the correct lines. Just no leds :(

    if (buttons & cwiid.BTN_LEFT):
        print 'Left pressed'
        motor.left_forward(50)
        sleep(button_delay)

    elif (buttons & cwiid.BTN_RIGHT):
        print 'Right pressed'
        motor.right_forward(50)
        sleep(button_delay)

    elif (buttons & cwiid.BTN_UP):
        print 'Up pressed'
        motor.forward(100)
        sleep(button_delay)

    elif (buttons & cwiid.BTN_DOWN):
        print 'Down pressed'
        motor.backward(100)
        sleep(button_delay)

    elif (buttons & cwiid.BTN_A):
        print 'A'
        if startbool == False:
            print 'start aan'
            startbool = True
            sleep(0.5)
        else:
            print 'start uit'
            startbool = False
            sleep(0.5)

    elif (buttons & cwiid.BTN_1):
        if running:
            turn_on()
            sleep(5)
        print '1'
        print 'Licht 5 sec aan'

    elif (buttons & cwiid.BTN_2):
        print '2'
        print 'sirene 5 sec aan'
        siren_loop()
        sleep(5)


    else:
       GPIO.cleanup()

因此，例如，当我运行程序时，起始值会打开 LED。发生这种情况时，LED 灯亮起。但是wii遥控器连上之后就关机了，无法再开机

Answer 1

又试了几个小时，终于找到问题了。

最后一行说：

else:
    GPIO.cleanup()

重置了所有引脚，因此它们无法正常工作。删除 else 使一切恢复正常。

现在我知道问题原来这么简单xD

GPIO 引脚在我的程序中途不再工作

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