#!/usr/bin/python
# TSL2561

import smbus
import time

address = 0x29

# Get I2C bus
bus = smbus.SMBus(1)

# Select control register, 0x00 with command register, 0x80
# 0x03 == Power ON mode
bus.write_byte_data(address, 0x00 | 0x80, 0x03)

# Select timing register, 0x01 with command register, 0x80
# 0x02 == Nominal integration time INTEG=402ms, GAIN=1X
bus.write_byte_data(address, 0x01 | 0x80, 0x02)

time.sleep(0.5)

# Read data back from 0x0C with command register, 0xA0, Read Word
# ch0 LSB, ch0 MSB
data0 = bus.read_i2c_block_data(address, 0x0C | 0xA0, 2)

# Read data back from 0x0E with command register, 0xA0, Read Word
# ch1 LSB, ch1 MSB
data1 = bus.read_i2c_block_data(address, 0x0E | 0xA0, 2)

# Convert the data
ch0 = data0[1] * 256 + data0[0]
ch1 = data1[1] * 256 + data1[0]

# Output data to screen
print "Full Spectrum(IR + Visible) :%d lux" %ch0
print "Infrared Value :%d lux" %ch1
print "Visible Value :%d lux" %(ch0 - ch1)