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Adafruit_MLX90632/Adafruit_MLX90632.h
ladyada 39dd3c54fe Update license to MIT and add proper attribution 
- Change from BSD to MIT license across all files
- Add MIT LICENSE file with standard text
- Update author attribution to Limor "Ladyada" Fried with assistance from Claude Code
- Update file headers to reference MIT license and LICENSE file
- Enhance README with comprehensive feature list and proper attribution
- Update README to reference LICENSE file instead of license.txt

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-08-03 12:51:32 -04:00

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/*!
* @file Adafruit_MLX90632.h
*
* I2C Driver for MLX90632 Far Infrared Temperature Sensor
*
* This is a library for the Adafruit MLX90632 breakout:
* http://www.adafruit.com/products
*
* Adafruit invests time and resources providing this open source code,
* please support Adafruit and open-source hardware by purchasing products from
* Adafruit!
*
* Written by Limor "Ladyada" Fried with assistance from Claude Code.
*
* MIT license, see LICENSE for more information
*/
#ifndef _ADAFRUIT_MLX90632_H
#define _ADAFRUIT_MLX90632_H
#include <Adafruit_BusIO_Register.h>
#include <Adafruit_I2CDevice.h>
#include <Wire.h>
#include "Arduino.h"
/*=========================================================================
I2C ADDRESS/BITS
-----------------------------------------------------------------------*/
#define MLX90632_DEFAULT_ADDR 0x3A ///< MLX90632 default i2c address
/*=========================================================================*/
/*=========================================================================
REGISTERS
-----------------------------------------------------------------------*/
// EEPROM addresses
#define MLX90632_REG_MELEXIS_RESERVED0 0x2400 ///< Melexis reserved
#define MLX90632_REG_MELEXIS_RESERVED1 0x2401 ///< Melexis reserved
#define MLX90632_REG_MELEXIS_RESERVED2 0x2402 ///< Melexis reserved
#define MLX90632_REG_MELEXIS_RESERVED3 0x2403 ///< Melexis reserved
#define MLX90632_REG_MELEXIS_RESERVED4 0x2404 ///< Melexis reserved
#define MLX90632_REG_ID0 0x2405 ///< Chip ID
#define MLX90632_REG_ID1 0x2406 ///< Chip ID
#define MLX90632_REG_ID2 0x2407 ///< Chip ID
#define MLX90632_REG_ID_CRC16 0x2408 ///< CRC
#define MLX90632_REG_EE_PRODUCT_CODE 0x2409 ///< Sensor information
#define MLX90632_REG_MELEXIS_RESERVED10 0x240A ///< Melexis reserved
#define MLX90632_REG_EE_VERSION 0x240B ///< EEPROM version
#define MLX90632_REG_EE_P_R_LSW \
0x240C ///< P_R calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_P_R_MSW \
0x240D ///< P_R calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_P_G_LSW \
0x240E ///< P_G calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_P_G_MSW \
0x240F ///< P_G calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_P_T_LSW \
0x2410 ///< P_T calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_P_T_MSW \
0x2411 ///< P_T calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_P_O_LSW \
0x2412 ///< P_O calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_P_O_MSW \
0x2413 ///< P_O calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_AA_LSW \
0x2414 ///< Aa calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_AA_MSW \
0x2415 ///< Aa calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_AB_LSW \
0x2416 ///< Ab calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_AB_MSW \
0x2417 ///< Ab calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_BA_LSW \
0x2418 ///< Ba calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_BA_MSW \
0x2419 ///< Ba calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_BB_LSW \
0x241A ///< Bb calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_BB_MSW \
0x241B ///< Bb calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_CA_LSW \
0x241C ///< Ca calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_CA_MSW \
0x241D ///< Ca calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_CB_LSW \
0x241E ///< Cb calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_CB_MSW \
0x241F ///< Cb calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_DA_LSW \
0x2420 ///< Da calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_DA_MSW \
0x2421 ///< Da calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_DB_LSW \
0x2422 ///< Db calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_DB_MSW \
0x2423 ///< Db calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_EA_LSW \
0x2424 ///< Ea calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_EA_MSW \
0x2425 ///< Ea calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_EB_LSW \
0x2426 ///< Eb calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_EB_MSW \
0x2427 ///< Eb calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_FA_LSW \
0x2428 ///< Fa calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_FA_MSW \
0x2429 ///< Fa calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_FB_LSW \
0x242A ///< Fb calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_FB_MSW \
0x242B ///< Fb calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_GA_LSW \
0x242C ///< Ga calibration constant (16-bit, Least Significant Word)
#define MLX90632_REG_EE_GA_MSW \
0x242D ///< Ga calibration constant (16-bit, Most Significant Word)
#define MLX90632_REG_EE_GB 0x242E ///< Gb calibration constant (16-bit)
#define MLX90632_REG_EE_KA 0x242F ///< Ka calibration constant (16-bit)
#define MLX90632_REG_EE_KB 0x2430 ///< Kb calibration constant (16-bit)
#define MLX90632_REG_MELEXIS_RESERVED49 0x2431 ///< Melexis reserved
#define MLX90632_REG_MELEXIS_RESERVED127 0x247F ///< Melexis reserved
#define MLX90632_REG_MELEXIS_RESERVED128 0x2480 ///< Melexis reserved
#define MLX90632_REG_EE_HA 0x2481 ///< Ha Customer calibration constant (16 bit)
#define MLX90632_REG_EE_HB 0x2482 ///< Hb Customer calibration constant (16 bit)
#define MLX90632_REG_MELEXIS_RESERVED131 0x2483 ///< Melexis reserved
#define MLX90632_REG_CUSTOMER_DATA_START 0x24C0 ///< Customer data start
#define MLX90632_REG_CUSTOMER_DATA_END 0x24CF ///< Customer data end
#define MLX90632_REG_MELEXIS_RESERVED208 0x24D0 ///< Melexis reserved
#define MLX90632_REG_EE_CONTROL \
0x24D4 ///< EEPROM Control register, measurement control
#define MLX90632_REG_EE_I2C_ADDRESS 0x24D5 ///< I2C slave address >> 1
#define MLX90632_REG_MELEXIS_RESERVED214 0x24D6 ///< Melexis reserved
#define MLX90632_REG_EE_MEAS_1 0x24E1 ///< Measurement settings 1
#define MLX90632_REG_EE_MEAS_2 0x24E2 ///< Measurement settings 2
// Control and Status registers
#define MLX90632_REG_I2C_ADDRESS 0x3000 ///< I2C slave address >> 1
#define MLX90632_REG_CONTROL 0x3001 ///< Control register, measurement mode
#define MLX90632_REG_STATUS 0x3FFF ///< Status register: data available
// RAM addresses
#define MLX90632_REG_RAM_1 0x4000 ///< Raw data 1
#define MLX90632_REG_RAM_2 0x4001 ///< Raw data 2
#define MLX90632_REG_RAM_3 0x4002 ///< Raw data 3
#define MLX90632_REG_RAM_4 0x4003 ///< Raw data 4
#define MLX90632_REG_RAM_5 0x4004 ///< Raw data 5
#define MLX90632_REG_RAM_6 0x4005 ///< Raw data 6
#define MLX90632_REG_RAM_7 0x4006 ///< Raw data 7
#define MLX90632_REG_RAM_8 0x4007 ///< Raw data 8
#define MLX90632_REG_RAM_9 0x4008 ///< Raw data 9
#define MLX90632_REG_RAM_52 0x4033 ///< Raw data 52
#define MLX90632_REG_RAM_53 0x4034 ///< Raw data 53
#define MLX90632_REG_RAM_54 0x4035 ///< Raw data 54
#define MLX90632_REG_RAM_55 0x4036 ///< Raw data 55
#define MLX90632_REG_RAM_56 0x4037 ///< Raw data 56
#define MLX90632_REG_RAM_57 0x4038 ///< Raw data 57
#define MLX90632_REG_RAM_58 0x4039 ///< Raw data 58
#define MLX90632_REG_RAM_59 0x403A ///< Raw data 59
#define MLX90632_REG_RAM_60 0x403B ///< Raw data 60
/*=========================================================================*/
/*=========================================================================
CONTROL REGISTER ENUMS
-----------------------------------------------------------------------*/
/*!
* @brief MLX90632 measurement modes
*/
typedef enum {
MLX90632_MODE_HALT = 0x00, ///< Halt mode for EEPROM operations
MLX90632_MODE_SLEEPING_STEP = 0x01, ///< Sleeping step mode
MLX90632_MODE_STEP = 0x02, ///< Step mode
MLX90632_MODE_CONTINUOUS = 0x03 ///< Continuous mode
} mlx90632_mode_t;
/*!
* @brief MLX90632 measurement types
*/
typedef enum {
MLX90632_MEAS_MEDICAL = 0x00, ///< Medical measurement
MLX90632_MEAS_EXTENDED_RANGE = 0x11 ///< Extended range measurement
} mlx90632_meas_select_t;
/*!
* @brief MLX90632 refresh rates
*/
typedef enum {
MLX90632_REFRESH_0_5HZ = 0, ///< 0.5 Hz (2000ms)
MLX90632_REFRESH_1HZ = 1, ///< 1 Hz (1000ms)
MLX90632_REFRESH_2HZ = 2, ///< 2 Hz (500ms)
MLX90632_REFRESH_4HZ = 3, ///< 4 Hz (250ms)
MLX90632_REFRESH_8HZ = 4, ///< 8 Hz (125ms)
MLX90632_REFRESH_16HZ = 5, ///< 16 Hz (62.5ms)
MLX90632_REFRESH_32HZ = 6, ///< 32 Hz (31.25ms)
MLX90632_REFRESH_64HZ = 7 ///< 64 Hz (15.625ms)
} mlx90632_refresh_rate_t;
/*=========================================================================*/
/*!
* @brief Class that stores state and functions for interacting with
* MLX90632 Far Infrared Temperature Sensor
*/
class Adafruit_MLX90632 {
public:
Adafruit_MLX90632();
~Adafruit_MLX90632();
bool begin(uint8_t i2c_addr = MLX90632_DEFAULT_ADDR, TwoWire* wire = &Wire);
uint64_t getProductID();
uint16_t getProductCode();
uint16_t getEEPROMVersion();
bool startSingleMeasurement();
bool startFullMeasurement();
bool setMode(mlx90632_mode_t mode);
mlx90632_mode_t getMode();
bool setMeasurementSelect(mlx90632_meas_select_t meas_select);
mlx90632_meas_select_t getMeasurementSelect();
bool isBusy();
bool isEEPROMBusy();
bool reset();
uint8_t readCyclePosition();
bool resetNewData();
bool isNewData();
bool setRefreshRate(mlx90632_refresh_rate_t refresh_rate);
mlx90632_refresh_rate_t getRefreshRate();
bool getCalibrations();
double getAmbientTemperature();
double getObjectTemperature();
private:
Adafruit_I2CDevice* i2c_dev; ///< Pointer to I2C bus interface
uint16_t swapBytes(
uint16_t value); ///< Byte swap helper for register addresses
uint32_t read32BitRegister(
uint16_t lsw_addr); ///< Helper to read 32-bit values
// Calibration constants
double P_R; ///< P_R calibration constant
double P_G; ///< P_G calibration constant
double P_T; ///< P_T calibration constant
double P_O; ///< P_O calibration constant
double Aa; ///< Aa calibration constant
double Ab; ///< Ab calibration constant
double Ba; ///< Ba calibration constant
double Bb; ///< Bb calibration constant
double Ca; ///< Ca calibration constant
double Cb; ///< Cb calibration constant
double Da; ///< Da calibration constant
double Db; ///< Db calibration constant
double Ea; ///< Ea calibration constant
double Eb; ///< Eb calibration constant
double Fa; ///< Fa calibration constant
double Fb; ///< Fb calibration constant
double Ga; ///< Ga calibration constant
double Gb; ///< Gb calibration constant
double Ka; ///< Ka calibration constant
int16_t Kb; ///< Kb calibration constant (16-bit signed)
double Ha; ///< Ha calibration constant
double Hb; ///< Hb calibration constant
// Temperature calculation variables
double TO0; ///< Previous object temperature (starts at 25.0)
double TA0; ///< Previous ambient temperature (starts at 25.0)
};
#endif
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