HX711.py 文件源码

def read(self):
        self.waitForReady()
        unsignedValue = 0

        for i in range(0, self.readBits):
            GPIO.output(self.PD_SCK, True)
            unsignedValue = unsignedValue << 1
            GPIO.output(self.PD_SCK, False)
            bit = GPIO.input(self.DOUT)
            if (bit):
                unsignedValue = unsignedValue | 1

        self.setChannelGainFactor()
        signedValue = self.correctForTwosComplement(unsignedValue)

        self.lastVal = signedValue
        return self.lastVal