t6713.hpp

/*
 * Author: Henry Bruce <henry.bruce@intel.com>
 * Copyright (c) 2015 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */


#include "mraa/i2c.hpp"
#include "interfaces/iCO2Sensor.hpp"

namespace upm {
namespace t6713_co2
{
    /* COMMAND VALUES */
    typedef enum
    {
        T6713_COMMAND_RESET,
        T6713_COMMAND_STATUS,
        T6713_COMMAND_GET_FIRMWARE_REVISION,
        T6713_COMMAND_GET_GAS_PPM
    }MODBUS_COMMANDS;

    typedef enum
    {
        ERROR_CONDITION,
        FLASH_ERROR,
        CALIBRATION_ERROR,
        WARMUP_MODE,
        SINGLE_POINT_CALIBRATION,
        RS232,
        I2C,
        RS485
    }STATUS;

    typedef struct
    {
        uint8_t function_code;
        uint8_t register_address_msb;
        uint8_t register_address_lsb;
        uint8_t input_registers_to_read_msb;
        uint8_t input_registers_to_read_lsb;

    }COMMAND;

    typedef struct
    {
        uint8_t function_code;
        uint8_t byte_count;
        uint8_t status_msb;
        uint8_t status_lsb;

    }RESPONSE;

    typedef enum
    {
        READ_INPUT_REGISTERS = 4,
        WRITE_SINGLE_COIL,
        WRITE_SINGLE_HOLDING_REGISTER
    }FUNCTION_CODES;
}//namespace t6713_co2

class T6713 : public ICO2Sensor {
    public:
        T6713 (int bus);

        virtual ~T6713 () {};

        virtual const char* getModuleName() { return "t6713"; }

        uint16_t getPpm ();
        uint16_t getFirmwareRevision();


    private:
        mraa::Result runCommand(t6713_co2::MODBUS_COMMANDS command);
        uint16_t getSensorData(t6713_co2::MODBUS_COMMANDS cmd);
        t6713_co2::STATUS getStatus();

        mraa::I2c i2c;
        mraa::Result status;
};

}//namespace upm