DevSmbus.hpp

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/*
 * This file is part of the DUDS project. It is subject to the BSD-style
 * license terms in the LICENSE file found in the top-level directory of this
 * distribution and at https://github.com/jjackowski/duds/blob/master/LICENSE.
 * No part of DUDS, including this file, may be copied, modified, propagated,
 * or distributed except according to the terms contained in the LICENSE file.
 *
 * Copyright (C) 2017  Jeff Jackowski
 */
#include <duds/hardware/interface/Smbus.hpp>
#include <string>

#ifdef linux
// !@?!#?!#?
#undef linux
#endif

// defined in linux/i2c-dev.h
struct i2c_smbus_ioctl_data;

namespace duds { namespace hardware { namespace interface { namespace linux {

class DevSmbus : public duds::hardware::interface::Smbus {
    std::string dev;
    int fd;
    int addr;
    void io(i2c_smbus_ioctl_data &sdat);
public:
    DevSmbus(const std::string &devname, int devaddr, bool pec = true);
    DevSmbus(const std::string &devname, int devaddr, UsePec) :
        DevSmbus(devname, devaddr, true) { }
    DevSmbus(const std::string &devname, int devaddr, NoPec) :
        DevSmbus(devname, devaddr, false) { }
    ~DevSmbus();
    // documentation for the functions below is in
    //  duds/hardware/interface/Smbus.hpp
    virtual std::uint8_t receiveByte();
    virtual std::uint8_t receiveByte(std::uint8_t cmd);
    virtual std::uint16_t receiveWord(std::uint8_t cmd);
    virtual int receive(
        std::uint8_t cmd,
        std::uint8_t *in,
        const int maxlen
    );
    virtual void receive(std::uint8_t cmd, std::vector<std::uint8_t> &in);
    virtual void transmitBool(bool out);
    virtual void transmitByte(std::uint8_t byte);
    virtual void transmitByte(std::uint8_t cmd, std::uint8_t byte);
    virtual void transmitWord(std::uint8_t cmd, std::uint16_t word);
    virtual void transmit(
        std::uint8_t cmd,
        const std::uint8_t *out,
        const int len
    );
    virtual std::uint16_t call(std::uint8_t cmd, std::uint16_t word);
    virtual void call(
        std::uint8_t cmd,
        const std::vector<std::uint8_t> &out,
        std::vector<std::uint8_t> &in
    );
    virtual int address() const;
};

} } } }