hx711.py 文件源码

def __init__(self, dout=5, pd_sck=6, gain=128, bitsToRead=24):
        self.PD_SCK = pd_sck
        self.DOUT = dout

        GPIO.setwarnings(False)
        GPIO.setmode(GPIO.BCM)
        GPIO.setup(self.PD_SCK, GPIO.OUT)
        GPIO.setup(self.DOUT, GPIO.IN)

        # The value returned by the hx711 that corresponds to your
        # reference unit AFTER dividing by the SCALE.
        self.REFERENCE_UNIT = 1

        self.GAIN = 0
        self.OFFSET = 1
        self.lastVal = 0
        self.bitsToRead = bitsToRead
        self.twosComplementThreshold = 1 << (bitsToRead-1)
        self.twosComplementOffset = -(1 << (bitsToRead))
        self.setGain(gain)
        self.read()