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/*!
* @file DFRobot_CCS811.h
* @brief Define the basic structure of class DFRobot_CCS811
* @copyright Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
* @licence The MIT License (MIT)
* @author [yufeng](yufeng.luo@dfrobot.com)
* @version V1.0
* @date 2019-07-13
* @get from https://www.dfrobot.com
* @url https://github.com/DFRobot/DFRobot_CCS811
*/
#ifndef _DFROBOT_CCS811_H
#define _DFROBOT_CCS811_H
#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include <Wire.h>
/*I2C ADDRESS*/
#define CCS811_I2C_ADDRESS1 0x5A
#define CCS811_I2C_ADDRESS2 0x5B
#define CCS811_REG_STATUS 0x00
#define CCS811_REG_MEAS_MODE 0x01
#define CCS811_REG_ALG_RESULT_DATA 0x02
#define CCS811_REG_RAW_DATA 0x03
#define CCS811_REG_ENV_DATA 0x05
#define CCS811_REG_NTC 0x06
#define CCS811_REG_THRESHOLDS 0x10
#define CCS811_REG_BASELINE 0x11
#define CCS811_REG_HW_ID 0x20
#define CCS811_REG_HW_VERSION 0x21
#define CCS811_REG_FW_BOOT_VERSION 0x23
#define CCS811_REG_FW_APP_VERSION 0x24
#define CCS811_REG_INTERNAL_STATE 0xA0
#define CCS811_REG_ERROR_ID 0xE0
#define CCS811_REG_SW_RESET 0xFF
#define CCS811_BOOTLOADER_APP_ERASE 0xF1
#define CCS811_BOOTLOADER_APP_DATA 0xF2
#define CCS811_BOOTLOADER_APP_VERIFY 0xF3
#define CCS811_BOOTLOADER_APP_START 0xF4
#define CCS811_HW_ID 0x81
//Open the macro to see the detailed program execution process.
//#define ENABLE_DBG
#ifdef ENABLE_DBG
#define DBG(...) {Serial.print("[");Serial.print(__FUNCTION__); Serial.print("(): "); Serial.print(__LINE__); Serial.print(" ] "); Serial.println(__VA_ARGS__);}
#else
#define DBG(...)
#endif
class DFRobot_CCS811_I2C
{
public:
// #define ERR_OK 0 //OK
#define ERR_DATA_BUS -1 //error in data bus
#define ERR_IC_VERSION -2 //chip version mismatch
uint8_t _deviceAddr;
typedef enum{
eMode0, //Idle (Measurements are disabled in this mode)
eMode1, //Constant power mode, IAQ measurement every second
eMode2, //Pulse heating mode IAQ measurement every 10 seconds
eMode3, //Low power pulse heating mode IAQ measurement every 60 seconds
eMode4 //Constant power mode, sensor measurement every 250ms 1xx: Reserved modes (For future use)
}eDRIVE_MODE_t;
typedef enum{
eClosed, //Idle (Measurements are disabled in this mode)
eCycle_1s, //Constant power mode, IAQ measurement every second
eCycle_10s, //Pulse heating mode IAQ measurement every 10 seconds
eCycle_60s, //Low power pulse heating mode IAQ measurement every 60 seconds
eCycle_250ms //Constant power mode, sensor measurement every 250ms 1xx: Reserved modes (For future use)
}eCycle_t;
/**
* @brief Constructor
* @param Input in Wire address
*/
DFRobot_CCS811_I2C(TwoWire *pWire = &Wire, uint8_t deviceAddr = 0x5A){_pWire = pWire; _deviceAddr = deviceAddr;};
/**
* @brief Constructor
* @return Return 0 if initialization succeeds, otherwise return non-zero.
*/
int begin();
/**
* @brief Judge if there is data to read
* @return Return 1 if there is, otherwise return 0.
*/
bool checkDataReady();
/**
* @brief Reset sensor, clear all configured data.
*/
void softReset(),
/**
* @brief Set environment parameter
* @param temperature Set temperature value, unit: centigrade, range (-40~85℃)
* @param humidity Set humidity value, unit: RH, range (0~100)
*/
setInTempHum(float temperature, float humidity),
/**
* @brief Measurement parameter configuration
* @param thresh:0 for Interrupt mode operates normally; 1 for interrupt mode only asserts the nINT signal (driven low) if the new
* @param interrupt:0 for Interrupt generation is disabled; 1 for the nINT signal is asserted (driven low) when a new sample is ready in
* @param mode:in typedef enum eDRIVE_MODE_t
*/
setMeasurementMode(uint8_t thresh, uint8_t interrupt, eDRIVE_MODE_t mode),
/**
* @brief Measurement parameter configuration
* @param mode:in typedef enum eDRIVE_MODE_t
*/
setMeasCycle(eCycle_t cycle),
/**
* @brief Set interrupt thresholds
* @param lowToMed: interrupt triggered value in range low to middle
* @param medToHigh: interrupt triggered value in range middle to high
*/
setThresholds(uint16_t lowToMed, uint16_t medToHigh);
/**
* @brief Get current configured parameter
* @return configuration code, needs to be converted into binary code to analyze
* The 2nd: Interrupt mode (if enabled) operates normally,1: Interrupt mode (if enabled) only asserts the nINT signal (driven low) if the new
* The 3rd: Interrupt generation is disabled,1: The nINT signal is asserted (driven low) when a new sample is ready in
* The 4th: 6th: in typedef enum eDRIVE_MODE_t
*/
uint8_t getMeasurementMode();
/**
* @brief Get the current carbon dioxide concentration
* @return current carbon dioxide concentration, unit:ppm
*/
uint16_t getCO2PPM(),
/**
* @brief Get current TVOC concentration
* @return Return current TVOC concentration, unit: ppb
*/
getTVOCPPB();
uint16_t readBaseLine();
void writeBaseLine(uint16_t baseLine);
protected:
typedef struct{
/*
* The CCS811 received an I²C write request addressed to this station but with invalid register address ID
*/
uint8_t sWRITE_REG_INVALID: 1;
/*
* The CCS811 received an I²C read request to a mailbox ID that is invalid
*/
uint8_t sREAD_REG_INVALID: 1;
/*
* The CCS811 received an I²C request to write an unsupported mode to MEAS_MODE
*/
uint8_t sMEASMODE_INVALID: 1;
/*
* The sensor resistance measurement has reached or exceeded the maximum range
*/
uint8_t sMAX_RESISTANCE: 1;
/*
* The The Heater current in the CCS811 is not in range
*/
uint8_t sHEATER_FAULT: 1;
/*
* The Heater voltage is not being applied correctly
*/
uint8_t sHEATER_SUPPLY: 1;
} __attribute__ ((packed))sError_id;
typedef struct{
/*
* ALG_RESULT_DATA crosses one of the thresholds set in the THRESHOLDS register
* by more than the hysteresis value (also in the THRESHOLDS register)
*/
uint8_t sINT_THRESH: 1;
/*
* At the end of each measurement cycle (250ms, 1s, 10s, 60s) a flag is set in the
* STATUS register regardless of the setting of this bit.
*/
uint8_t sINT_DATARDY: 1;
/*
* A new sample is placed in ALG_RESULT_DATA and RAW_DATA registers and the
* DATA_READY bit in the STATUS register is set at the defined measurement interval.
*/
uint8_t sDRIVE_MODE: 3;
} __attribute__ ((packed))sMeas_mode;
typedef struct{
/*
* This bit is cleared by reading ERROR_ID
* It is not sufficient to read the ERROR field of ALG_RESULT_DATA and STATUS
*/
uint8_t sERROR: 1;
/*
* ALG_RESULT_DATA is read on the I²C interface
*/
uint8_t sDATA_READY: 1;
uint8_t sAPP_VALID: 1;
/*
* After issuing a VERIFY command the application software must wait 70ms before
* issuing any transactions to CCS811 over the I²C interface
*/
uint8_t sAPP_VERIFY: 1;
/*
* After issuing the ERASE command the application software must wait 500ms
* before issuing any transactions to the CCS811 over the I2C interface.
*/
uint8_t sAPP_ERASE: 1;
uint8_t sFW_MODE: 1;
} __attribute__ ((packed))sStatus;
void getData(void);
void writeConfig();
virtual void writeReg(uint8_t reg, const void* pBuf, size_t size);
virtual uint8_t readReg(uint8_t reg, const void* pBuf, size_t size);
private:
TwoWire *_pWire;
uint16_t eCO2;
uint16_t eTVOC;
};
#endif
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