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local max44006 = {}
local device_address = 0x45
max44006.bus_id = 0
function max44006.writeReg(reg, data)
ret = true
i2c.start(max44006.bus_id)
if not i2c.address(max44006.bus_id, device_address, i2c.TRANSMITTER) then
ret = false
end
i2c.write(max44006.bus_id, reg, data)
i2c.stop(max44006.bus_id)
return ret
end
function max44006.readReg(reg, len)
ret = true
i2c.start(max44006.bus_id)
if not i2c.address(max44006.bus_id, device_address, i2c.TRANSMITTER) then
ret = false
end
i2c.write(max44006.bus_id, reg)
i2c.start(max44006.bus_id)
if not i2c.address(max44006.bus_id, device_address, i2c.RECEIVER) then
ret = false
end
local data = i2c.read(max44006.bus_id, len)
i2c.stop(max44006.bus_id)
return ret, data
end
function max44006.start()
max44006.readReg(0x00, 1)
max44006.readReg(0x00, 1)
max44006.writeReg(0x01, 0x20)
max44006.writeReg(0x02, 0x03)
end
function max44006.read()
ret = true
i2c.start(max44006.bus_id)
if not i2c.address(max44006.bus_id, device_address, i2c.TRANSMITTER) then
ret = false
end
i2c.write(max44006.bus_id, {0x04})
--i2c.stop(max44006.bus_id)
i2c.start(max44006.bus_id)
if not i2c.address(max44006.bus_id, device_address, i2c.RECEIVER) then
ret = false
end
local data = i2c.read(max44006.bus_id, 10)
i2c.stop(max44006.bus_id)
local mul = 0.512
max44006.clear = (bit.lshift(string.byte(data, 1), 8) + string.byte(data, 2)) * mul
max44006.red = (bit.lshift(string.byte(data, 3), 8) + string.byte(data, 4)) * mul
max44006.green = (bit.lshift(string.byte(data, 5), 8) + string.byte(data, 6)) * mul
max44006.blue = (bit.lshift(string.byte(data, 7), 8) + string.byte(data, 8)) * mul
max44006.ir = (bit.lshift(string.byte(data, 9), 8) + string.byte(data, 10)) * mul
return ret
end
return max44006
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