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tsl2561: light to digital sensor tsl2561

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Signed-off-by: Nandkishor <nandkishor.sonar@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
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Nandkishor
2014-10-10 16:19:44 +00:00
committed by Brendan Le Foll
parent fc776ba3a3
commit e9da4719fb
8 changed files with 503 additions and 0 deletions
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src/tsl2561/tsl2561.h Executable file
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/*
* Author: Nandkishor Sonar <Nandkishor.Sonar@intel.com>
* Copyright (c) 2014 Intel Corporation.
*
* * LIGHT-TO-DIGITAL CONVERTER [TAOS-TSL2561]
* Inspiration and lux calculation formulas from data sheet
* URL: http://www.adafruit.com/datasheets/TSL2561.pdf
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#pragma once
#include <string>
#include <mraa/i2c.h>
#include <math.h>
#define TSL2561_Address (0x29) //Device address
// Integration time
#define INTEGRATION_TIME0_13MS (0x00) // 13.7ms
#define INTEGRATION_TIME1_101MS (0x01) // 101ms
#define INTEGRATION_TIME2_402MS (0x02) // 402ms
// Integration time
#define GAIN_0X (0x00) // No gain - Low
#define GAIN_16X (0x10) // 16x gain - High
// Power control bits
#define CONTROL_POWERON (0x03) // ON
#define CONTROL_POWEROFF (0x00) // OFF
// TSL2561 registers
#define REGISTER_Control (0x80)
#define REGISTER_Timing (0x81)
#define REGISTER_Interrupt (0x86)
#define REGISTER_Channal0L (0x8C)
#define REGISTER_Channal0H (0x8D)
#define REGISTER_Channal1L (0x8E)
#define REGISTER_Channal1H (0x8F)
// Lux calculations differ slightly for CS package
#define LUX_SCALE (14) // Scale by 2^14
#define LUX_RATIOSCALE (9) // Scale ratio by 2^9
#define LUX_CHSCALE (10) // Scale channel values by 2^10
#define LUX_CHSCALE_TINT0 (0x7517) // 322/11 * 2^TSL2561_LUX_CHSCALE
#define LUX_CHSCALE_TINT1 (0x0FE7) // 322/81 * 2^TSL2561_LUX_CHSCALE
// CS package Coefficients
#define LUX_K1C (0x0043) // 0.130 * 2^RATIO_SCALE
#define LUX_B1C (0x0204) // 0.0315 * 2^LUX_SCALE
#define LUX_M1C (0x01ad) // 0.0262 * 2^LUX_SCALE
#define LUX_K2C (0x0085) // 0.260 * 2^RATIO_SCALE
#define LUX_B2C (0x0228) // 0.0337 * 2^LUX_SCALE
#define LUX_M2C (0x02c1) // 0.0430 * 2^LUX_SCALE
#define LUX_K3C (0x00c8) // 0.390 * 2^RATIO_SCALE
#define LUX_B3C (0x0253) // 0.0363 * 2^LUX_SCALE
#define LUX_M3C (0x0363) // 0.0529 * 2^LUX_SCALE
#define LUX_K4C (0x010a) // 0.520 * 2^RATIO_SCALE
#define LUX_B4C (0x0282) // 0.0392 * 2^LUX_SCALE
#define LUX_M4C (0x03df) // 0.0605 * 2^LUX_SCALE
#define LUX_K5C (0x014d) // 0.65 * 2^RATIO_SCALE
#define LUX_B5C (0x0177) // 0.0229 * 2^LUX_SCALE
#define LUX_M5C (0x01dd) // 0.0291 * 2^LUX_SCALE
#define LUX_K6C (0x019a) // 0.80 * 2^RATIO_SCALE
#define LUX_B6C (0x0101) // 0.0157 * 2^LUX_SCALE
#define LUX_M6C (0x0127) // 0.0180 * 2^LUX_SCALE
#define LUX_K7C (0x029a) // 1.3 * 2^RATIO_SCALE
#define LUX_B7C (0x0037) // 0.00338 * 2^LUX_SCALE
#define LUX_M7C (0x002b) // 0.00260 * 2^LUX_SCALE
#define LUX_K8C (0x029a) // 1.3 * 2^RATIO_SCALE
#define LUX_B8C (0x0000) // 0.000 * 2^LUX_SCALE
#define LUX_M8C (0x0000) // 0.000 * 2^LUX_SCALE
namespace upm {
/**
* @brief TSL2561 Digital Light Sensor library
* @defgroup tsl2561 libupm-tsl2561
*/
/**
* @brief C++ API for TSL2561 chip (Digital Light Sensor library)
*
* The LIGHT-TO-DIGITAL CONVERTER [TAOS-TSL2561]
* (http://www.adafruit.com/datasheets/TSL2561.pdf)
* The TSL2560 and TSL2561 are light-to-digital converters that transform light
* intensity to a digital signal output capable of direct I2C (TSL2561).
*
* @ingroup tsl2561
* @snippet tsl2561.cxx Interesting
* @image html grovetsl2561.jpeg
*/
class TSL2561{
public:
/**
* Instanciates a TSL2561 object
*
* @param bus number of used bus
* @param devAddr address of used i2c device
*/
TSL2561(int bus=0, uint8_t devAddr=TSL2561_Address, uint8_t gain=GAIN_0X, uint8_t integrationTime=INTEGRATION_TIME1_101MS);
/**
* GY65 object destructor to power down TSL2561 and close i2c connection.
*/
~TSL2561();
/**
* Get calculated lux reading from TSL2561
*
* @param lux - place holder to receive calculated lux value from TSL2561
*
* Return mraa_result_t
*/
mraa_result_t getLux(int &lux);
private:
/**
* Write to TSL2561 register
*
* @param reg addess to write
* @param value to write
*
* Return mraa_result_t
*/
mraa_result_t i2cWriteReg(uint8_t reg, uint8_t value);
/**
* Read from TSL2561 register
*
* @param reg addess to read
* @param data byte read from the register
*
* Return mraa_result_t
*/
mraa_result_t i2cReadReg(uint8_t reg, uint8_t &data);
int m_bus;
std::string m_name;
int m_controlAddr;
mraa_i2c_context m_i2ControlCtx;
uint8_t m_gain;
uint8_t m_integrationTime;
};
}