read.py 文件源码

def gpio_init():
        GPIO.setmode(GPIO.BCM)
        GPIO.setwarnings(False)

        # set up the SPI interface pins
        GPIO.setup(SPIMOSI, GPIO.OUT)
        GPIO.setup(SPIMISO, GPIO.IN)
        GPIO.setup(SPICLK, GPIO.OUT)
        GPIO.setup(SPICS, GPIO.OUT)

# read SPI data from MCP3008 chip, 8 possible adc's (0 thru 7)