# ADC3a.py

import smbus
import time
from py7seg import Py7Seg # xxx

bus = smbus.SMBus(1) # RPi revision 2 (0 for revision 1)
i2c_address = 0x4D  # default address
ps = Py7Seg() # xxx
t = 0
while True:
    # Reads word (2 bytes) as int
    rd = bus.read_word_data(i2c_address, 0)
    # Exchanges high and low bytes
    data = ((rd & 0xFF) << 8) | ((rd & 0xFF00) >> 8)
    # Ignores two least significiant bits
    data = data >> 2
    print t, "s:", data
    ps.showText("%4d" %data) # xxx
    t += 0.1
    time.sleep(0.1)