I2C.py 文件源码

def init(self,bitrate,SDAPIN,SCLPIN):
        if(SDAPIN != SCLPIN):
            self.SCL = SCLPIN
            self.SDA = SDAPIN

        else:
            print "SDA = GPIO"+str(self.SDA)+"  SCL = GPIO"+str(self.SCL)

        #configer SCL as output
        GPIO.setmode(GPIO.BCM)
        GPIO.setwarnings(False)
        GPIO.setup(self.SCL, GPIO.OUT)
        GPIO.setup(self.SDA, GPIO.OUT)
        GPIO.output(self.SDA, GPIO.HIGH)
        GPIO.output(self.SCL, GPIO.HIGH)


        if bitrate == 100:
            self.int_clk = 0.0000025
        elif bitrate == 400:
            self.int_clk = 0.000000625
        elif bitrate == 1000:
            self.int_clk = 1
        elif bitrate == 3200:
            self.int_clk = 1