#!usr/bin/python
import spidev
import os
import time

#Define Axis Channels
swt_channel = 0
vrx_channel = 1
vry_channel = 2

#Time Delay
delay = 0.5

#Spi oeffnen
spi = spidev.SpiDev()
spi.open(0,0)
spi.max_speed_hz=1000000

#Function for reading the MCP3008 channel between 0 and 7
def readChannel(channel):
    val = spi.xfer2([1,(8+channel)<<4,0])
    data = ((val[1]&3) <<8) + val[2]
    return data

#endless loop
while True:
    #Determine position
    vrx_pos = readChannel(vrx_channel)
    vry_pos = readChannel(vry_channel)

    #SW determine
    swt_val = readChannel(swt_channel)

    #output
    print("VRx : {} VRy : {} SW : {}".format(vrx_pos,vry_pos,swt_val))

    # wait
    time.sleep(delay)