LTC2943_1.py 文件源码

def get_smbus(self):
        # detect i2C port number and assign to i2c_bus
        i2c_bus = 0
        for line in open('/proc/cpuinfo').readlines():
            m = re.match('(.*?)\s*:\s*(.*)', line)
            if m:
                (name, value) = (m.group(1), m.group(2))
                if name == "Revision":
                    if value[-4:] in ('0002', '0003'):
                        i2c_bus = 0
                    else:
                        i2c_bus = 1
                    break
        try:        
            return smbus.SMBus(i2c_bus)
        except IOError:
                print ("Could not open the i2c bus.")