'
' BH1750 demo
'

#picaxe 08m2

'
' Pins
'
symbol scl=c.1
symbol sda=c.2

'
' constants
'
symbol BH1750ADDR = $46			' $b8 when ADDR = H
symbol BH1750CMDPWRDN = $00
symbol BH1750CMDPWRON = $01
symbol BH1750CMDRESET = $07
symbol BH1750CMDCONTHR = $10
symbol BH1750CMDCONTHR2 = $11
symbol BH1750CMDCONTLR = $13
symbol BH1750CMDONCEHR = $20
symbol BH1750CMDONCEHR2 = $21
symbol BH1750CMDONCELR = $23
symbol BH1750CMDCHMTH = $40
symbol BH1750CMDCHMTL = $60

'
' variables
'
symbol wlux=w4
symbol bluxhi=b9
symbol bluxlo=b8


Init:
	hi2csetup i2cmaster, BH1750ADDR, i2cfast, i2cbyte

Main:
do
	' One time read high resolution
	hi2cout (BH1750CMDONCEHR)
	pause 25
	hi2cin (bluxhi, bluxlo)
	' multiply wlux * 0.8333 (=1/1.2)
	wlux=wlux ** 54613
	debug
	pause 475
loop