upm/src/max44000/max44000.h

/*
 * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
 * Copyright (c) 2014 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.
 */
#pragma once

#include <string>
#include <maa/i2c.h>

#define ADDR               0x4A // device address

// registers address
#define ALSDATA_HIGH       0x04 // ambient sensor data high byte
#define ALSDATA_LOW        0x05 // ambient sensor data low byte
#define PRXDATA            0x15 // proximity sensor data
#define MCR                0x01 // Main Configuration Register
#define RCR                0x02 // Receive Configuration Register
#define TCR                0x03 // Transmit Configuration Register

#define HIGH               1
#define LOW                0

namespace upm {

/**
 * @brief C++ API for MAX44000 chip (Ambient and Infrared Proximity Sensor)
 *
 * This file defines the MAX44000 C++ interface for libmax44000
 *
 * @snippet proximity.cxx Interesting
 *
 * PMOD pins for MAX44000PMB1 board
 *
 * ( -= J1 =- )
 * (1) - NUL
 * (2) - IRQ
 * (3) - SCL
 * (4) - SDA
 * (5) - GND
 * (6) - VCC
 *
 */
class MAX44000 {
    public:
        /**
         * Instanciates a MAX44000 object
         *
         * @param bus number of used bus
         * @param devAddr addres of used i2c device
         */
        MAX44000 (int bus, int devAddr);

        /**
         * MAX44000 object destructor, basicaly it close i2c connection.
         */
        ~MAX44000 ();

        /**
         * Read the proximity value from the chip (based on ambient data).
         */
        uint16_t getProximity ();
        /**
         * Read the ambient value from the chip (based on ambient data).
         */
        uint16_t getAmbient ();

        /**
         * Return name of the component
         */
        std::string name()
        {
            return m_name;
        }
    private:
        uint16_t getALSData ();
        uint16_t getPRXData ();

        uint8_t i2cReadReg_8 (int reg);
        uint16_t i2cReadReg_16 (int reg);
        maa_result_t i2cWriteReg (uint8_t reg, uint8_t value);

        std::string m_name;

        int m_maxControlAddr;
        int m_bus;
        maa_i2c_context m_i2cMaxControlCtx;
};

}