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#pragma once
#include "sensorI2C.hpp"
#include <string>
/*
Header file for driver for MPL3115a2 breakout, based heavily on https://github.com/adafruit/Adafruit_MPL3115A2_Library/tree/master
Based on register declarations found https://cdn-shop.adafruit.com/datasheets/1893_datasheet.pdf
Designed using subclass for I2C handler for Beaglebone Black
*/
class AltimeterSensor : public sensorI2C {
private:
double internalTemperature = 0;
double internalAltitude = 0;
//ENUMS COPIED DIRECTLY FROM ADAFRUIT IMPLEMENTATION
/** MPL3115A2 registers **/
enum {
MPL3115A2_REGISTER_STATUS = (0x00),
MPL3115A2_REGISTER_PRESSURE_MSB = (0x01),
MPL3115A2_REGISTER_PRESSURE_CSB = (0x02),
MPL3115A2_REGISTER_PRESSURE_LSB = (0x03),
MPL3115A2_REGISTER_TEMP_MSB = (0x04),
MPL3115A2_REGISTER_TEMP_LSB = (0x05),
MPL3115A2_REGISTER_DR_STATUS = (0x06),
MPL3115A2_OUT_P_DELTA_MSB = (0x07),
MPL3115A2_OUT_P_DELTA_CSB = (0x08),
MPL3115A2_OUT_P_DELTA_LSB = (0x09),
MPL3115A2_OUT_T_DELTA_MSB = (0x0A),
MPL3115A2_OUT_T_DELTA_LSB = (0x0B),
MPL3115A2_WHOAMI = (0x0C),
//This is hard-coded in the device from the factory
MPL3115A2_WHOAMI_EXPECTED = (0xC4),
MPL3115A2_BAR_IN_MSB = (0x14),
MPL3115A2_BAR_IN_LSB = (0x15),
MPL3115A2_OFF_H = (0x2D),
};
/** MPL3115A2 status register BITS **/
enum {
MPL3115A2_REGISTER_STATUS_TDR = 0x02,
MPL3115A2_REGISTER_STATUS_PDR = 0x04,
MPL3115A2_REGISTER_STATUS_PTDR = 0x08,
};
/** MPL3115A2 PT DATA register BITS **/
enum {
MPL3115A2_PT_DATA_CFG = 0x13,
MPL3115A2_PT_DATA_CFG_TDEFE = 0x01,
MPL3115A2_PT_DATA_CFG_PDEFE = 0x02,
MPL3115A2_PT_DATA_CFG_DREM = 0x04,
};
/** MPL3115A2 control registers **/
enum {
MPL3115A2_CTRL_REG1 = (0x26),
MPL3115A2_CTRL_REG2 = (0x27),
MPL3115A2_CTRL_REG3 = (0x28),
MPL3115A2_CTRL_REG4 = (0x29),
MPL3115A2_CTRL_REG5 = (0x2A),
};
/** MPL3115A2 control register BITS **/
enum {
MPL3115A2_CTRL_REG1_SBYB = 0x01,
MPL3115A2_CTRL_REG1_OST = 0x02,
MPL3115A2_CTRL_REG1_RST = 0x04,
MPL3115A2_CTRL_REG1_RAW = 0x40,
MPL3115A2_CTRL_REG1_ALT = 0x80,
MPL3115A2_CTRL_REG1_BAR = 0x00,
};
/** MPL3115A2 oversample values **/
enum {
MPL3115A2_CTRL_REG1_OS1 = 0x00,
MPL3115A2_CTRL_REG1_OS2 = 0x08,
MPL3115A2_CTRL_REG1_OS4 = 0x10,
MPL3115A2_CTRL_REG1_OS8 = 0x18,
MPL3115A2_CTRL_REG1_OS16 = 0x20,
MPL3115A2_CTRL_REG1_OS32 = 0x28,
MPL3115A2_CTRL_REG1_OS64 = 0x30,
MPL3115A2_CTRL_REG1_OS128 = 0x38,
};
/** MPL3115A2 measurement modes **/
typedef enum {
MPL3115A2_BAROMETER = 0,
MPL3115A2_ALTIMETER,
} mpl3115a2_mode_t;
/** MPL3115A2 measurement types **/
typedef enum {
MPL3115A2_PRESSURE,
MPL3115A2_ALTITUDE,
MPL3115A2_TEMPERATURE,
} mpl3115a2_meas_t;
//This never actually gets used, and I can't find anything in the datasheet about it??
#define MPL3115A2_REGISTER_STARTCONVERSION (0x12) ///< start conversion
//Store current operating mode, sent to device during startup procedure
//This is why an enum is used rather than raw #define statements
mpl3115a2_mode_t currentMode;
//Struct for storing ctrl register contents, copied from adafruit implementation
typedef union {
struct {
uint8_t SBYB : 1;
uint8_t OST : 1;
uint8_t RST : 1;
uint8_t OS : 3;
uint8_t RAW : 1;
uint8_t ALT : 1;
} bit;
uint8_t reg;
} CTRL_REG_1_STRUCT;
//Create instance of this register config to use during device startup and operation
CTRL_REG_1_STRUCT ctrl_reg1;
public:
/**
* @brief Construct a new Altimeter Sensor object
*
*/
AltimeterSensor(std::string I2C_FILE);
/**
* @brief Initialize the Altimeter
*
* @param data Data for initializing the sensor
* @return true Initialization Success
* @return false Initialization Failure
*/
bool init() override;
//Data getters and setters
// double getPressure();
double getAltitude();
double getTemperature();
double setSeaLevelPressure(double pressure);
//Data and mode handlers
//Use altimeter mode by default as this is what rocket logger wants
void setMode(mpl3115a2_mode_t mode = MPL3115A2_ALTIMETER);
void requestOneShotReading();
bool isNewDataAvailable();
void updateCurrentDataBuffer();
};
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