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172 lines
5.9 KiB
C++
172 lines
5.9 KiB
C++
/*
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* Author: Nandkishor Sonar <Nandkishor.Sonar@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* LIGHT-TO-DIGITAL CONVERTER [TAOS-TSL2561]
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* Inspiration and lux calculation formulas from data sheet
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* URL: http://www.adafruit.com/datasheets/TSL2561.pdf
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <string>
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#include <mraa/i2c.h>
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#include <math.h>
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namespace upm {
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#define TSL2561_Address (0x29) //Device address
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// Integration time
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#define INTEGRATION_TIME0_13MS (0x00) // 13.7ms
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#define INTEGRATION_TIME1_101MS (0x01) // 101ms
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#define INTEGRATION_TIME2_402MS (0x02) // 402ms
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// Integration time
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#define GAIN_0X (0x00) // No gain - Low
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#define GAIN_16X (0x10) // 16x gain - High
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// Power control bits
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#define CONTROL_POWERON (0x03) // ON
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#define CONTROL_POWEROFF (0x00) // OFF
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// TSL2561 registers
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#define REGISTER_Control (0x80)
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#define REGISTER_Timing (0x81)
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#define REGISTER_Interrupt (0x86)
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#define REGISTER_Channal0L (0x8C)
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#define REGISTER_Channal0H (0x8D)
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#define REGISTER_Channal1L (0x8E)
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#define REGISTER_Channal1H (0x8F)
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// Lux calculations differ slightly for CS package
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#define LUX_SCALE (14) // Scale by 2^14
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#define LUX_RATIOSCALE (9) // Scale ratio by 2^9
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#define LUX_CHSCALE (10) // Scale channel values by 2^10
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#define LUX_CHSCALE_TINT0 (0x7517) // 322/11 * 2^TSL2561_LUX_CHSCALE
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#define LUX_CHSCALE_TINT1 (0x0FE7) // 322/81 * 2^TSL2561_LUX_CHSCALE
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// CS package Coefficients
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#define LUX_K1C (0x0043) // 0.130 * 2^RATIO_SCALE
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#define LUX_B1C (0x0204) // 0.0315 * 2^LUX_SCALE
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#define LUX_M1C (0x01ad) // 0.0262 * 2^LUX_SCALE
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#define LUX_K2C (0x0085) // 0.260 * 2^RATIO_SCALE
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#define LUX_B2C (0x0228) // 0.0337 * 2^LUX_SCALE
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#define LUX_M2C (0x02c1) // 0.0430 * 2^LUX_SCALE
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#define LUX_K3C (0x00c8) // 0.390 * 2^RATIO_SCALE
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#define LUX_B3C (0x0253) // 0.0363 * 2^LUX_SCALE
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#define LUX_M3C (0x0363) // 0.0529 * 2^LUX_SCALE
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#define LUX_K4C (0x010a) // 0.520 * 2^RATIO_SCALE
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#define LUX_B4C (0x0282) // 0.0392 * 2^LUX_SCALE
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#define LUX_M4C (0x03df) // 0.0605 * 2^LUX_SCALE
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#define LUX_K5C (0x014d) // 0.65 * 2^RATIO_SCALE
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#define LUX_B5C (0x0177) // 0.0229 * 2^LUX_SCALE
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#define LUX_M5C (0x01dd) // 0.0291 * 2^LUX_SCALE
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#define LUX_K6C (0x019a) // 0.80 * 2^RATIO_SCALE
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#define LUX_B6C (0x0101) // 0.0157 * 2^LUX_SCALE
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#define LUX_M6C (0x0127) // 0.0180 * 2^LUX_SCALE
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#define LUX_K7C (0x029a) // 1.3 * 2^RATIO_SCALE
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#define LUX_B7C (0x0037) // 0.00338 * 2^LUX_SCALE
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#define LUX_M7C (0x002b) // 0.00260 * 2^LUX_SCALE
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#define LUX_K8C (0x029a) // 1.3 * 2^RATIO_SCALE
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#define LUX_B8C (0x0000) // 0.000 * 2^LUX_SCALE
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#define LUX_M8C (0x0000) // 0.000 * 2^LUX_SCALE
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/**
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* @brief TSL2561 Digital Light Sensor library
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* @defgroup tsl2561 libupm-tsl2561
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* @ingroup seeed i2c light eak
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*/
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/**
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* @library tsl2561
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* @sensor tsl2561
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* @comname TSL2561 Light Sensor
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* @altname Grove Digital Light Sensor
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* @type light
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* @man seeed
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* @web http://www.seeedstudio.com/wiki/Grove_-_Digital_Light_Sensor
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* @con i2c
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* @kit eak
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*
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* @brief API for the TSL2561 Digital Light Sensor
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*
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* TSL2560 and TSL2561 are light-to-digital converters that transform
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* light intensity to a digital signal output capable of a direct I2C (TSL2561) interface
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*
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* @image html tsl2561.jpg
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* @snippet tsl2561.cxx Interesting
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*/
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class TSL2561{
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public:
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/**
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* Instantiates a TSL2561 object
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*
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* @param bus Number of the used bus
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* @param devAddr Address of the used I2C device
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* @param gain Correct gain to use
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* @param integration Time to use
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*/
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TSL2561(int bus=0, uint8_t devAddr=TSL2561_Address, uint8_t gain=GAIN_0X, uint8_t integrationTime=INTEGRATION_TIME1_101MS);
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/**
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* GY65 object destructor; powers down TSL2561 and closes the I2C connection.
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*/
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~TSL2561();
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/**
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* Gets the calculated lux reading from TSL2561
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*
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* @return Calculated lux value from the sensor
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*/
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int getLux();
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private:
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/**
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* Writes to a TSL2561 register
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*
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* @param reg Addess to write
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* @param Value to write
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* @return mraa_result_t
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*/
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mraa_result_t i2cWriteReg(uint8_t reg, uint8_t value);
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/**
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* Reads from a TSL2561 register
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*
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* @param reg Addess to read
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* @param data Byte read from the register
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* @return mraa_result_t
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*/
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mraa_result_t i2cReadReg(uint8_t reg, uint8_t &data);
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int m_bus;
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std::string m_name;
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int m_controlAddr;
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mraa_i2c_context m_i2ControlCtx;
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uint8_t m_gain;
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uint8_t m_integrationTime;
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};
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}
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