i2c.hpp

/*
 * Author: Brendan Le Foll <brendan.le.foll@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 "i2c.h"
#include <stdexcept>

namespace mraa {

class I2c {
    public:
        I2c(int bus, bool raw=false) {
            if (raw) {
                m_i2c = mraa_i2c_init_raw(bus);
            }
            else {
                m_i2c = mraa_i2c_init(bus);
            }
            if (m_i2c == NULL) {
                throw std::invalid_argument("Invalid i2c bus");
            }
        }

        ~I2c() {
            mraa_i2c_stop(m_i2c);
        }

        mraa_result_t frequency(mraa_i2c_mode_t mode) {
            return mraa_i2c_frequency(m_i2c, mode);
        }

        mraa_result_t address(uint8_t address) {
            return mraa_i2c_address(m_i2c, address);
        }

        uint8_t readByte() {
            return (uint8_t) mraa_i2c_read_byte(m_i2c);
        }

        int read(uint8_t *data, int length) {
            return mraa_i2c_read(m_i2c, data, length);
        }

        uint8_t readReg(uint8_t reg) {
            return mraa_i2c_read_byte_data(m_i2c, reg);
        }

        uint16_t readWordReg(uint8_t reg) {
            return mraa_i2c_read_word_data(m_i2c, reg);
        }

        mraa_result_t writeByte(uint8_t data) {
            return mraa_i2c_write_byte(m_i2c, data);
        }

        mraa_result_t write(const uint8_t* data, int length) {
            return mraa_i2c_write(m_i2c, data, length);
        }

        mraa_result_t writeReg(uint8_t reg, uint8_t data) {
            return mraa_i2c_write_byte_data(m_i2c, data, reg);
        }

        mraa_result_t writeWordReg(uint8_t reg, uint16_t data) {
            return mraa_i2c_write_word_data(m_i2c, data, reg);
        }
    private:
        mraa_i2c_context m_i2c;
};

}