tca9548a.hpp

/*
 * Author: Gerard Vidal <gerard.vidal@ens-lyon.fr>
 * Copyright (c) 2017 IFE-ENS-Lyon
 * Author: Keelan Lightfoot <keelanlightfoot@gmail.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.
 */

#pragma once

#include <iostream>
#include <string>
#include "mraa.hpp"
#include "mraa/i2c.hpp"

#define TCA9548A_I2C_BUS 0
#define TCA9548A_DEFAULT_ADDR 0x70
#define TCA9548A_NO_PORTS 0x00
#define TCA9548A_ALL_PORTS 0xFF

#define TCA9548A_MIN_PORT 0
#define TCA9548A_MAX_PORT 7

namespace upm {
    class TCA9548A {

    public:
        typedef enum {
            DISABLED = 0,
            ENABLED = 1
        } TCA9548A_PORT_STATE;

        typedef enum {
            EXCLUSIVE = 0,
            INCLUSIVE = 1
        } TCA9548A_PORT_MODE;


        TCA9548A (int bus, uint8_t address = 0x70);

        ~TCA9548A();

        std::string name() {
            return m_name;
        }

        bool getPort(int port);

        void setPort(int port, TCA9548A_PORT_STATE state,
                     TCA9548A_PORT_MODE mode);

        void disableAllPorts();

        void enableAllPorts();

    private:
        std::string m_name;

        mraa::I2c* i2c;

        uint8_t getPortConfig();
        void setPortConfig(uint8_t config);
        bool validPort(int port);
    };
}