photobooth_main.py 文件源码

def set_up_gpio(self):
        GPIO.setmode(GPIO.BCM)
        #GPIO.setup(camera_led_pin, GPIO.OUT, initial=False) # Set GPIO to output
        GPIO.setup(config.led_pin_select,GPIO.OUT) # The 'Select' button LED
        GPIO.setup(config.led_pin_left,GPIO.OUT) # The 'Left' button LED
        GPIO.setup(config.led_pin_right,GPIO.OUT) # The 'Right' button LED

        # Detect falling edge on all buttons
        GPIO.setup(config.button_pin_select, GPIO.IN, pull_up_down=GPIO.PUD_UP)
        GPIO.setup(config.button_pin_left, GPIO.IN, pull_up_down=GPIO.PUD_UP)
        GPIO.setup(config.button_pin_right, GPIO.IN, pull_up_down=GPIO.PUD_UP)
        GPIO.setup(config.button_pin_exit, GPIO.IN, pull_up_down=GPIO.PUD_UP)

        # Drumminhands found it necessary to switch off LEDs initially
        GPIO.output(config.led_pin_select, False)
        GPIO.output(config.led_pin_left, False)
        GPIO.output(config.led_pin_right, False)