i2c_switch2.py

#3 switches of UNB2
import logging
from .i2c_smbus import i2c_smbus as i2c

class i2c_switch2(i2c):
    def __init__(self,config):
        i2c.__init__(self,config)
        self.SWaddr1=config['devreg'][0]['addr']
        self.SWaddr2=config['devreg'][1]['addr']
        self.SWaddr3=config['devreg'][2]['addr']
        self.channel1=-1
        self.channel2=-1
        self.channel3=-1
        logging.info("i2c switch2 at address %i,%i,%i" % (self.SWaddr1,self.SWaddr2,self.SWaddr3))
        logging.warn("APSCT switch disabled for testing")

    def SetSW1(self,channelbit):
        channel=1<<(channelbit)
        if (channel)==self.channel1: return True;
        logging.debug("SetChannel1=%i" % channelbit)
        self.channel1=channel
        self.channel2=-1
        self.channel3=-1
        return True; #testing without APSCT switch
#        return self.i2csetget(self.SWaddr1,[channel])

    def SetSW2(self,channelbit):
        channel=1<<(channelbit)
        if (channel)==self.channel2: return True;
        logging.debug("SetChannel2=%i" % channelbit)
        self.channel2=channel
        self.channel3=-1
        return self.i2csetget(self.SWaddr2,[channel])

    def SetSW3(self,channelbit):
        channel=1<<(channelbit)
        if (channel)==self.channel3: return True;
        logging.debug("SetChannel3=%i" % channelbit)
        self.channel3=channel
        return self.i2csetget(self.SWaddr3,[channel])