apa102.py 文件源码

def show():
    """Output the buffer"""
    global _gpio_setup

    if not _gpio_setup:
        GPIO.setmode(GPIO.BCM)
        GPIO.setwarnings(False)
        GPIO.setup([DAT,CLK,CS],GPIO.OUT)
        _gpio_setup = True

    GPIO.output(CS, 0)
    _sof()

    for pixel in pixels:
        r, g, b, brightness = pixel
        _write_byte(0b11100000 | brightness)
        _write_byte(b)
        _write_byte(g)
        _write_byte(r)

    _eof()
    GPIO.output(CS, 1)