kalipi.py 文件源码

def screen_off(backlightControl):

    screen.canvas.fill(black)
    pygame.display.update()
    if backlightControl == "3.5r":
        process = subprocess.call("echo '0' > /sys/class/backlight/soc\:backlight/brightness", shell=True)
    elif backlightControl == "4dpi-24":
        process = subprocess.call("echo '0' > /sys/class/backlight/24-hat-pwm/brightness", shell=True)
    else:
        backlight = GPIO.PWM(18, 0.1)
        backlight.start(0)

    process = subprocess.call("setterm -term linux -back black -fore white -clear all", shell=True)
    return()

# Input loop for touch event