i2c_lib.py

import smbus
from time import *

class i2c_device:
  def __init__(self, addr, port=1):
    self.addr = addr
    self.bus = smbus.SMBus(port)   

# Write a single command
  def write_cmd(self, cmd):
    self.bus.write_byte(self.addr, cmd)
    sleep(0.0001)

# Write a command and argument
  def write_cmd_arg(self, cmd, data):
    self.bus.write_byte_data(self.addr, cmd, data)
    sleep(0.0001)

# Write a block of data
  def write_block_data(self, cmd, data):
    self.bus.write_block_data(self.addr, cmd, data)
    sleep(0.0001)

# Read a single byte
  def read(self):
    return self.bus.read_byte(self.addr)

# Read 
  def read_data(self, cmd):
    return self.bus.read_byte_data(self.addr, cmd)

# Read a block of data
  def read_block_data(self, cmd):
    return self.bus.read_block_data(self.addr, cmd)