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moved GY33_MCU library to own repository

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moved GY33_MCU library to own repository
This commit is contained in:
BPoH_Voodoo
2019-02-04 10:30:29 +01:00
parent fe08b3767d
commit 5d51311cf3
2 changed files with 0 additions and 324 deletions
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Arduino/McLighting/GY33_MCU.cpp
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/**************************************************************************/
/*!
@file GY33_MCU.h
@author BPoHVoodoo (FabLab Luenen)
@section LICENSE
Software License Agreement (BSD License)
Copyright (c) 2018,
All rights reserved.
Driver for the GY-33 MCU digital color sensors.
@section HISTORY
v1.0 - First release
*/
/**************************************************************************/
#include <stdlib.h>
#include <math.h>
#include "GY33_MCU.h"
/*========================================================================*/
/* PRIVATE FUNCTIONS */
/*========================================================================*/
/**************************************************************************/
/*!
@brief Implements missing powf function
*/
/**************************************************************************/
float powf(const float x, const float y)
{
return (float)(pow((double)x, (double)y));
}
/**************************************************************************/
/*!
@brief Writes a register and an 8 bit value over I2C
*/
/**************************************************************************/
uint8_t GY33_MCU::write8 (uint8_t reg, uint8_t val)
{
uint8_t buf[2];
brzo_i2c_start_transaction(MCU_ADDRESS, SCL_SPEED);
buf[0]=reg;
buf[1]=val;
brzo_i2c_write(buf, 2, false);
return brzo_i2c_end_transaction();
}
/**************************************************************************/
/*!
@brief Reads an 8 bit value over I2C
*/
/**************************************************************************/
uint8_t GY33_MCU::read8(uint8_t reg)
{
uint8_t buf[2];
brzo_i2c_start_transaction(MCU_ADDRESS, SCL_SPEED);
buf[0]=reg;
brzo_i2c_write(buf,1, true);
brzo_i2c_read(buf, 1, false);
brzo_i2c_end_transaction();
return buf[0];
}
/**************************************************************************/
/*!
@brief Reads a 16 bit values over I2C
*/
/**************************************************************************/
uint16_t GY33_MCU::read16(uint8_t reg)
{
uint16_t x; uint16_t t;
uint8_t buf[2];
brzo_i2c_start_transaction(MCU_ADDRESS, SCL_SPEED);
buf[0]=reg;
brzo_i2c_write(buf, 1, true);
brzo_i2c_read(buf, 2, false);
brzo_i2c_end_transaction();
x = buf[0];
t = buf[1];
x <<= 8;
x |= t;
return buf[0] << 8 | buf[1];
}
/*========================================================================*/
/* CONSTRUCTORS */
/*========================================================================*/
/**************************************************************************/
/*!
Constructor
*/
/**************************************************************************/
GY33_MCU::GY33_MCU()
{
_MCUInitialised = false;
}
/*========================================================================*/
/* PUBLIC FUNCTIONS */
/*========================================================================*/
/**************************************************************************/
/*!
Initializes I2C and configures the sensor (call this function before
doing anything else)
*/
/**************************************************************************/
boolean GY33_MCU::begin(void)
{
brzo_i2c_setup(SDA, SCL, SCL_STRETCH_TIMEOUT);
/* Make sure we're actually connected */
uint8_t x = read8(MCU_CONFIG);
Serial.println(x, HEX);
if (x != 0x10)
{
return false;
}
_MCUInitialised = true;
return true;
}
/**************************************************************************/
/*!
@brief Reads the raw red, green, blue and clear channel values
*/
/**************************************************************************/
void GY33_MCU::getRawData (uint16_t *r, uint16_t *g, uint16_t *b, uint16_t *c, uint16_t *lux, uint16_t *ct)
{
if (!_MCUInitialised) begin();
*r = read16(MCU_RDATAH);
*g = read16(MCU_GDATAH);
*b = read16(MCU_BDATAH);
*c = read16(MCU_CDATAH);
*lux = read16(MCU_LDATAH);
*ct = read16(MCU_CTDATAH);
}
void GY33_MCU::getData (uint8_t *r, uint8_t *g, uint8_t *b, uint8_t *c, uint8_t *conf)
{
if (!_MCUInitialised) begin();
*r = read8(MCU_RDATA);
*g = read8(MCU_GDATA);
*b = read8(MCU_BDATA);
*c = read8(MCU_COLDATA);
*conf = read8(MCU_CONFIG);
}
/**************************************************************************/
/*!
@brief Converts the raw R/G/B values to color temperature in degrees
Kelvin
*/
/**************************************************************************/
uint16_t GY33_MCU::calculateColorTemperature(uint16_t r, uint16_t g, uint16_t b)
{
float X, Y, Z; /* RGB to XYZ correlation */
float xc, yc; /* Chromaticity co-ordinates */
float n; /* McCamy's formula */
float cct;
/* 1. Map RGB values to their XYZ counterparts. */
/* Based on 6500K fluorescent, 3000K fluorescent */
/* and 60W incandescent values for a wide range. */
/* Note: Y = Illuminance or lux */
X = (-0.14282F * r) + (1.54924F * g) + (-0.95641F * b);
Y = (-0.32466F * r) + (1.57837F * g) + (-0.73191F * b);
Z = (-0.68202F * r) + (0.77073F * g) + ( 0.56332F * b);
/* 2. Calculate the chromaticity co-ordinates */
xc = (X) / (X + Y + Z);
yc = (Y) / (X + Y + Z);
/* 3. Use McCamy's formula to determine the CCT */
n = (xc - 0.3320F) / (0.1858F - yc);
/* Calculate the final CCT */
cct = (449.0F * powf(n, 3)) + (3525.0F * powf(n, 2)) + (6823.3F * n) + 5520.33F;
/* Return the results in degrees Kelvin */
return (uint16_t)cct;
}
/**************************************************************************/
/*!
@brief Converts the raw R/G/B values to lux
*/
/**************************************************************************/
uint16_t GY33_MCU::calculateLux(uint16_t r, uint16_t g, uint16_t b)
{
float illuminance;
/* This only uses RGB ... how can we integrate clear or calculate lux */
/* based exclusively on clear since this might be more reliable? */
illuminance = (-0.32466F * r) + (1.57837F * g) + (-0.73191F * b);
return (uint16_t)illuminance;
}
void GY33_MCU::setConfig(uint8_t high, uint8_t low) {
Serial.println("GY-33: ");
Serial.println(high | low, HEX);
write8(MCU_CONFIG, high | low);
}
uint8_t GY33_MCU::getConfig(void)
{
if (!_MCUInitialised) begin();
return read8(MCU_CONFIG);
}
Arduino/McLighting/GY33_MCU.h
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#include <brzo_i2c.h> //https://github.com/pasko-zh/brzo_i2c
/**************************************************************************/
/*!
@file GY33_MCU.h
@author BPoHVoodoo (FabLab Luenen)
@section LICENSE
Software License Agreement (BSD License)
Copyright (c) 2018,
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holders nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**************************************************************************/
#ifndef _MCU_H_
#define _MCU_H_
#include <brzo_i2c.h> // https://github.com/pasko-zh/brzo_i2c
#define MCU_ADDRESS (0x5A)
#define SCL_SPEED 100
#define SCL_STRETCH_TIMEOUT 50000
#define MCU_LED_OFF (0xA0)
#define MCU_LED_01 (0x90)
#define MCU_LED_02 (0x80)
#define MCU_LED_03 (0x70)
#define MCU_LED_04 (0x60)
#define MCU_LED_05 (0x50)
#define MCU_LED_06 (0x40)
#define MCU_LED_07 (0x30)
#define MCU_LED_08 (0x20)
#define MCU_LED_09 (0x10)
#define MCU_LED_10 (0x00)
#define MCU_WHITE_OFF (0x00) /* No Whitebalance */
#define MCU_WHITE_ON (0x01) /* Whitebalance */
#define MCU_RDATAH (0x00) /* Raw Red channel data */
#define MCU_RDATAL (0x01)
#define MCU_GDATAH (0x02) /* Raw Green channel data */
#define MCU_GDATAL (0x03)
#define MCU_BDATAH (0x04) /* Raw Blue channel data */
#define MCU_BDATAL (0x05)
#define MCU_CDATAH (0x06) /* Clear channel data */
#define MCU_CDATAL (0x07)
#define MCU_LDATAH (0x08) /* Lux channel data */
#define MCU_LDATAL (0x09)
#define MCU_CTDATAH (0x0A) /* Colortemperature channel data */
#define MCU_CTDATAL (0x0B)
#define MCU_RDATA (0x0C) /* Red channel data */
#define MCU_GDATA (0x0D) /* Green channel data */
#define MCU_BDATA (0x0E) /* Blue channel data */
#define MCU_COLDATA (0x0F) /* Blue channel data */
#define MCU_CONFIG (0x10) /* Config channel data */
class GY33_MCU {
public:
GY33_MCU();
boolean begin(void);
void getRawData(uint16_t *r, uint16_t *g, uint16_t *b, uint16_t *c, uint16_t *lux, uint16_t *ct);
void getData(uint8_t *r, uint8_t *g, uint8_t *b, uint8_t *c, uint8_t *conf);
uint16_t calculateColorTemperature(uint16_t r, uint16_t g, uint16_t b);
uint16_t calculateLux(uint16_t r, uint16_t g, uint16_t b);
uint8_t write8 (uint8_t reg, uint8_t val);
uint8_t read8 (uint8_t reg);
uint16_t read16 (uint8_t reg);
void setConfig(uint8_t h, uint8_t l);
uint8_t getConfig(void);
private:
boolean _MCUInitialised;
void disable(void);
};
#endif