_i2c_connector.py 文件源码

def __init__(self, name, sda=None, scl=None,
                 addr=8, ignore_case=False, report_change=True):
        not_found = "i2c device not found"

        self.addr = addr
        self.ownaddr = addr
        self.count = None
        self.current_value = ""
        self.suspend_start = None
        self.suspend_time = 0
        self.msgq = None
        if type(sda) is I2C:
            i2c = sda
        else:
            i2c = I2C(sda=sda, scl=scl)

        try:
            l = i2c.scan()  # see, if you can find the dive with respective addr
        except OSError:
            print(not_found)
        else:
            if addr in l:
                self.present = True
                Device.__init__(self, name, i2c, setters={"set":self.evaluate},
                                ignore_case=ignore_case,report_change=report_change)
                self.getters[""]=self.value
            else:
                print(not_found)