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TSL2561: Adding C source

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Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>
This commit is contained in:
Abhishek Malik 2016-09-02 15:54:14 -07:00 committed by Noel Eck
parent b01b52dfb8
commit 8c4b5333d5
4 changed files with 503 additions and 5 deletions
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14
src/tsl2561/CMakeLists.txt
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set (libname "tsl2561")
set (libdescription "upm tsl2561")
set (module_src ${libname}.cxx)
set (module_hpp ${libname}.hpp)
upm_module_init()
upm_mixed_module_init (NAME tsl2561
DESCRIPTION "upm tsl2561 Digital Light Sensor"
C_HDR tsl2561.h
C_SRC tsl2561.c
CPP_HDR tsl2561.hpp
CPP_SRC tsl2561.cxx
FTI_SRC tsl2561_fti.c
CPP_WRAPS_C
REQUIRES libmraa)

246
src/tsl2561/tsl2561.c Normal file
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/*
* Author: Nandkishor Sonar <Nandkishor.Sonar@intel.com>,
* Abhishek Malik <abhishek.malik@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.
*/
#include "tsl2561.h"
// forward declaration
upm_result_t tsl2561_compute_lux(const tsl2561_context dev, int *int_data);
tsl2561_context tsl2561_init(int bus, uint8_t dev_address, uint8_t gain,
uint8_t integration_time){
tsl2561_context dev =
(tsl2561_context)malloc(sizeof(struct _tsl2561_context));
if (!dev)
return NULL;
dev->bus = bus;
dev->address = dev_address;
dev->gain = gain;
dev->integration_time = integration_time;
dev->i2c = mraa_i2c_init(dev->bus);
if(dev->i2c == NULL){
free(dev);
return NULL;
}
if (mraa_i2c_address(dev->i2c, dev->address) != MRAA_SUCCESS)
{
mraa_i2c_stop(dev->i2c);
free(dev);
return NULL;
}
// POWER UP.
if(mraa_i2c_write_byte_data(dev->i2c, CONTROL_POWERON, REGISTER_Control) != MRAA_SUCCESS){
mraa_i2c_stop(dev->i2c);
free(dev);
return NULL;
}
// Power on Settling time
upm_delay_us(1000);
// Gain & Integration time.
if(mraa_i2c_write_byte_data(dev->i2c, (dev->gain | dev->integration_time), REGISTER_Timing) != MRAA_SUCCESS){
mraa_i2c_stop(dev->i2c);
free(dev);
return NULL;
}
// Set interrupt threshold to default.
if(mraa_i2c_write_byte_data(dev->i2c, 0x00, REGISTER_Interrupt) != MRAA_SUCCESS){
mraa_i2c_stop(dev->i2c);
free(dev);
return NULL;
}
return dev;
}
void tsl2561_close(tsl2561_context dev){
if (mraa_i2c_write_byte_data(dev->i2c, CONTROL_POWEROFF,
REGISTER_Control) != MRAA_SUCCESS){
printf("Unable turn off device\n");
}
mraa_i2c_stop(dev->i2c);
free(dev);
}
upm_result_t tsl2561_get_lux(const tsl2561_context dev, float* lux){
int lux_val=0;
tsl2561_compute_lux(dev, &lux_val);
*lux = (float) lux_val;
return UPM_SUCCESS;
}
upm_result_t tsl2561_i2c_write_reg(tsl2561_context dev, uint8_t reg,
uint8_t value){
// Start transmission to device
if(mraa_i2c_address(dev->i2c, dev->address) != MRAA_SUCCESS){
return UPM_ERROR_OPERATION_FAILED;
}
// Write register to I2C
if(mraa_i2c_write_byte(dev->i2c, reg) != MRAA_SUCCESS){
return UPM_ERROR_OPERATION_FAILED;
}
// Write value to I2C
if(mraa_i2c_write_byte(dev->i2c, value) != MRAA_SUCCESS){
return UPM_ERROR_OPERATION_FAILED;
}
upm_delay_ms(100);
return UPM_SUCCESS;
}
upm_result_t tsl2561_i2c_read_reg(tsl2561_context dev, uint8_t reg,
uint8_t* data){
// Start transmission to dev
if(mraa_i2c_address(dev->i2c, dev->address) != MRAA_SUCCESS){
return UPM_ERROR_OPERATION_FAILED;
}
// Send address of register to be read.
if(mraa_i2c_write_byte(dev->i2c, reg) != MRAA_SUCCESS){
return UPM_ERROR_OPERATION_FAILED;
}
// Read byte.
*data = mraa_i2c_read_byte(dev->i2c);
//upm_delay(1);
return UPM_SUCCESS;
}
upm_result_t tsl2561_compute_lux(const tsl2561_context dev, int *int_data) {
int lux;
uint16_t raw_lux_ch_0;
uint16_t raw_lux_ch_1;
uint8_t ch0_low, ch0_high, ch1_low, ch1_high;
if (tsl2561_i2c_read_reg(dev, REGISTER_Channal0L, &ch0_low) != UPM_SUCCESS){
return UPM_ERROR_OPERATION_FAILED;
}
if(tsl2561_i2c_read_reg(dev, REGISTER_Channal0H, &ch0_high) != UPM_SUCCESS){
return UPM_ERROR_OPERATION_FAILED;
}
raw_lux_ch_0 = ch0_high*256 + ch0_low;
if(tsl2561_i2c_read_reg(dev, REGISTER_Channal1L, &ch1_low) != UPM_SUCCESS){
return UPM_ERROR_OPERATION_FAILED;
}
if(tsl2561_i2c_read_reg(dev, REGISTER_Channal1H, &ch1_high) != UPM_SUCCESS){
return UPM_ERROR_OPERATION_FAILED;
}
raw_lux_ch_1 = ch1_high*256 + ch1_low;
uint64_t scale = 0;
switch(dev->integration_time){
case 0: // 13.7 msec
scale = LUX_CHSCALE_TINT0;
break;
case 1: // 101 msec
scale = LUX_CHSCALE_TINT1;
break;
case 2: // assume no scaling
scale = (1 << LUX_CHSCALE);
break;
}
// scale if gain is NOT 16X
if(!dev->gain)
scale = scale << 4;
uint64_t channel1 = 0;
uint64_t channel0 = 0;
// scale the channel values
channel0 = (raw_lux_ch_0 * scale) >> LUX_CHSCALE;
channel1 = (raw_lux_ch_1 * scale) >> LUX_CHSCALE;
// find the ratio of the channel values (Channel1/Channel0)
// protect against divide by zero
uint64_t ratio_1 = 0;
if (channel0 != 0)
ratio_1 = (channel1 << (LUX_RATIOSCALE+1)) / channel0;
// round the ratio value
unsigned long ratio = (ratio_1 + 1) >> 1;
unsigned int b, m;
// CS package
// Check if ratio <= eachBreak ?
if ((ratio >= 0) && (ratio <= LUX_K1C)){
b=LUX_B1C; m=LUX_M1C;
}
else if (ratio <= LUX_K2C){
b=LUX_B2C; m=LUX_M2C;
}
else if (ratio <= LUX_K3C){
b=LUX_B3C; m=LUX_M3C;
}
else if (ratio <= LUX_K4C){
b=LUX_B4C; m=LUX_M4C;
}
else if (ratio <= LUX_K5C){
b=LUX_B5C; m=LUX_M5C;
}
else if (ratio <= LUX_K6C){
b=LUX_B6C; m=LUX_M6C;
}
else if (ratio <= LUX_K7C){
b=LUX_B7C; m=LUX_M7C;
}
else if (ratio > LUX_K8C){
b=LUX_B8C; m=LUX_M8C;
}
uint64_t temp_lux = 0;
temp_lux = ((channel0 * b) - (channel1 * m));
// do not allow negative lux value
if (temp_lux < 0) temp_lux = 0;
// round lsb (2^(LUX_SCALE-1))
temp_lux += (1 << (LUX_SCALE-1));
// strip off fractional portion
lux = temp_lux >> LUX_SCALE;
*int_data = lux;
return UPM_SUCCESS;
}

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src/tsl2561/tsl2561.h Normal file
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/*
* Author: Nandkishor Sonar <Nandkishor.Sonar@intel.com>,
* Abhishek Malik <abhishek.malik@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.
*/
#ifndef TSL2561_H_
#define TSL2561_H_
#include <stdint.h>
#include <upm.h>
#include <mraa/i2c.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
/**
* device context
*/
typedef struct _tsl2561_context {
mraa_i2c_context i2c;
int bus;
uint8_t address;
uint8_t gain;
uint8_t integration_time;
} *tsl2561_context;
/**
* Sensor Init Function
*
* @param bus I2C bus
* @param dev_address I2C address
* @param gain Gain associated with the driver
* @param integration_time
* @return void* pointer to the sensor struct
*/
tsl2561_context tsl2561_init(int bus, uint8_t dev_address, uint8_t gain,
uint8_t integration_time);
/**
* Closes the sensor module
*
* @param dev pointer to the sensor struct
*/
void tsl2561_close(tsl2561_context dev);
/**
* Gets the Lux value
*
* @param dev pointer to the sensor struct
* @param lux pointer to store the lux value
* @return upm_result_t UPM success/error code
*/
upm_result_t tsl2561_get_lux(const tsl2561_context, float* lux);
/**
* Write I2C register on the device
*
* @param dev pointer to the sensor struct
* @param reg register to write value to
* @param value the value to be written
* @return upm_result_t UPM success/error code
*/
upm_result_t tsl2561_i2c_write_reg(tsl2561_context dev, uint8_t reg,
uint8_t value);
/**
* Read from an I2C register from the device
*
* @param dev pointer to the sensor struct
* @param reg register to write value to
* @param data Data read in from the register
* @return upm_result_t UPM success/error code
*/
upm_result_t tsl2561_i2c_read_reg(tsl2561_context dev, uint8_t reg,
uint8_t* data);
#endif /* TSL2561_H_ */

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src/tsl2561/tsl2561_fti.c Normal file
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/*
* Author: Nandkishor Sonar <Nandkishor.Sonar@intel.com>,
* Abhishek Malik <abhishek.malik@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.
*/
#include "tsl2561.h"
#include "upm_fti.h"
/**
* This file implements the Function Table Interface (FTI) for this sensor
*/
const char upm_tsl2561_name[] = "TSL2561";
const char upm_tsl2561_description[] = "Grove Digital Light Sensor";
const upm_protocol_t upm_tsl2561_protocol[] = {UPM_I2C};
const upm_sensor_t upm_tsl2561_category[] = {UPM_LIGHT};
// forward declarations
const upm_sensor_descriptor_t upm_tsl2561_get_descriptor ();
const void* upm_tsl2561_get_ft(upm_sensor_t sensor_type);
void* upm_tsl2561_init_name();
void upm_tsl2561_close(void* dev);
upm_result_t upm_tsl2561_get_lux(const void* dev, float* lux);
const upm_sensor_descriptor_t upm_tsl2561_get_descriptor (){
upm_sensor_descriptor_t usd;
usd.name = upm_tsl2561_name;
usd.description = upm_tsl2561_description;
usd.protocol_size = 1;
usd.protocol = upm_tsl2561_protocol;
usd.category_size = 1;
usd.category = upm_tsl2561_category;
return usd;
}
static const upm_sensor_ft ft =
{
.upm_sensor_init_name = &upm_tsl2561_init_name,
.upm_sensor_close = &upm_tsl2561_close,
.upm_sensor_get_descriptor = &upm_tsl2561_get_descriptor
};
static const upm_light_ft lft =
{
.upm_light_get_value = &upm_tsl2561_get_lux
};
const void* upm_tsl2561_get_ft(upm_sensor_t sensor_type){
if(sensor_type == UPM_LIGHT){
return &lft;
}
else if(sensor_type == UPM_SENSOR){
return &ft;
}
return NULL;
}
void* upm_tsl2561_init_name(){
return NULL;
}
void upm_tsl2561_close(void* dev){
tsl2561_close((tsl2561_context)dev);
}
upm_result_t upm_tsl2561_get_lux(const void* dev, float* lux){
return tsl2561_get_lux((tsl2561_context)dev, lux);
}