sensor LIB1

#pragma once

#if (ARDUINO >= 100)
 #include "Arduino.h"
#else
 #include "WProgram.h"
#endif

#include <Wire.h>

#define MAX30105_ADDRESS          0x57 //7-bit I2C Address
//Note that MAX30102 has the same I2C address and Part ID

#define I2C_SPEED_STANDARD        100000
#define I2C_SPEED_FAST            400000

//Define the size of the I2C buffer based on the platform the user has
#if defined(__AVR_ATmega328P__) || defined(__AVR_ATmega168__)

  //I2C_BUFFER_LENGTH is defined in Wire.H
  #define I2C_BUFFER_LENGTH BUFFER_LENGTH

#elif defined(__SAMD21G18A__)

  //SAMD21 uses RingBuffer.h
  #define I2C_BUFFER_LENGTH SERIAL_BUFFER_SIZE

#else

  //The catch-all default is 32
  #define I2C_BUFFER_LENGTH 32

#endif

class MAX30105 {
 public: 
  MAX30105(void);

  boolean begin(TwoWire &wirePort = Wire, uint32_t i2cSpeed = I2C_SPEED_STANDARD, uint8_t i2caddr = MAX30105_ADDRESS);

  uint32_t getRed(void); //Returns immediate red value
  uint32_t getIR(void); //Returns immediate IR value
  uint32_t getGreen(void); //Returns immediate green value
  bool safeCheck(uint8_t maxTimeToCheck); //Given a max amount of time, check for new data

  // Configuration
  void softReset();
  void shutDown(); 
  void wakeUp(); 

  void setLEDMode(uint8_t mode);

  void setADCRange(uint8_t adcRange);
  void setSampleRate(uint8_t sampleRate);
  void setPulseWidth(uint8_t pulseWidth);

  void setPulseAmplitudeRed(uint8_t value);
  void setPulseAmplitudeIR(uint8_t value);
  void setPulseAmplitudeGreen(uint8_t value);
  void setPulseAmplitudeProximity(uint8_t value);

  void setProximityThreshold(uint8_t threshMSB);

  //Multi-led configuration mode (page 22)
  void enableSlot(uint8_t slotNumber, uint8_t device); //Given slot number, assign a device to slot
  void disableSlots(void);
  
  // Data Collection

  //Interrupts (page 13, 14)
  uint8_t getINT1(void); //Returns the main interrupt group
  uint8_t getINT2(void); //Returns the temp ready interrupt
  void enableAFULL(void); //Enable/disable individual interrupts
  void disableAFULL(void);
  void enableDATARDY(void);
  void disableDATARDY(void);
  void enableALCOVF(void);
  void disableALCOVF(void);
  void enablePROXINT(void);
  void disablePROXINT(void);
  void enableDIETEMPRDY(void);
  void disableDIETEMPRDY(void);

  //FIFO Configuration (page 18)
  void setFIFOAverage(uint8_t samples);
  void enableFIFORollover();
  void disableFIFORollover();
  void setFIFOAlmostFull(uint8_t samples);
  
  //FIFO Reading
  uint16_t check(void); //Checks for new data and fills FIFO
  uint8_t available(void); //Tells caller how many new samples are available (head - tail)
  void nextSample(void); //Advances the tail of the sense array
  uint32_t getFIFORed(void); //Returns the FIFO sample pointed to by tail
  uint32_t getFIFOIR(void); //Returns the FIFO sample pointed to by tail
  uint32_t getFIFOGreen(void); //Returns the FIFO sample pointed to by tail

  uint8_t getWritePointer(void);
  uint8_t getReadPointer(void);
  void clearFIFO(void); //Sets the read/write pointers to zero

  //Proximity Mode Interrupt Threshold
  void setPROXINTTHRESH(uint8_t val);

  // Die Temperature
  float readTemperature();
  float readTemperatureF();

  // Detecting ID/Revision
  uint8_t getRevisionID();
  uint8_t readPartID();  

  // Setup the IC with user selectable settings
  void setup(byte powerLevel = 0x1F, byte sampleAverage = 4, byte ledMode = 3, int sampleRate = 400, int pulseWidth = 411, int adcRange = 4096);

  // Low-level I2C communication
  uint8_t readRegister8(uint8_t address, uint8_t reg);
  void writeRegister8(uint8_t address, uint8_t reg, uint8_t value);

 private:
  TwoWire *_i2cPort; //The generic connection to user's chosen I2C hardware
  uint8_t _i2caddr;

  //activeLEDs is the number of channels turned on, and can be 1 to 3. 2 is common for Red+IR.
  byte activeLEDs; //Gets set during setup. Allows check() to calculate how many bytes to read from FIFO
  
  uint8_t revisionID; 

  void readRevisionID();

  void bitMask(uint8_t reg, uint8_t mask, uint8_t thing);
 
   #define STORAGE_SIZE 4 //Each long is 4 bytes so limit this to fit on your micro
  typedef struct Record
  {
    uint32_t red[STORAGE_SIZE];
    uint32_t IR[STORAGE_SIZE];
    uint32_t green[STORAGE_SIZE];
    byte head;
    byte tail;
  } sense_struct; //This is our circular buffer of readings from the sensor

  sense_struct sense;

};