source: flair-src/trunk/lib/FlairCore/src/I2cPort.h@ 4

// %flair:license{
// This file is part of the Flair framework distributed under the
// CECILL-C License, Version 1.0.
// %flair:license}
/*!
 * \file I2cPort.h
 * \brief Base class for i2c port
 * \author Guillaume Sanahuja, Copyright Heudiasyc UMR UTC/CNRS 7253
 * \date 2014/04/24
 * \version 4.0
 */

#ifndef I2CPORT_H
#define I2CPORT_H

#include <Mutex.h>
#include <stdint.h>

namespace flair
{
namespace core
{
    /*! \class I2cPort
    *
    * \brief Base class for i2c port
    *
    * This class has a Mutex which must be used to protect access to the port in case
    * that more than one Thread is using it. Lock the Mutex before any communication (including SetSlave)
    * and release it after communication.
    */
    class I2cPort: public Mutex
    {
        public:
            /*!
            * \brief Constructor
            *
            * Construct an i2c port.
            *
            * \param parent parent
            * \param name name
            */
            I2cPort(const Object* parent,std::string name): Mutex(parent,name)
            {}

            /*!
            * \brief Destructor
            *
            */
            ~I2cPort(){};

            /*!
            * \brief Set slave's address
            *
            * This function need to be called before any communication.
            *
            * \param address slave's address
            */
            virtual int SetSlave(uint16_t address)=0;

            /*!
            * \brief Write datas
            *
            * \param buf pointer to datas
            * \param nbyte length of datas
            *
            * \return amount of written datas
            */
            virtual ssize_t Write(const void *buf,size_t nbyte)=0;

            /*!
            * \brief Read datas
            *
            * \param buf pointer to datas
            * \param nbyte length of datas
            *
            * \return amount of read datas
            */
            virtual ssize_t Read(void *buf,size_t nbyte)=0;

            /*!
            * \brief Set RX timeout
            *
            * Timeout for waiting an ACK from the slave.
            *
            * \param timeout_ns timeout in nano second
            */
            virtual void SetRxTimeout(Time timeout_ns)=0;

            /*!
            * \brief Set TX timeout
            *
            * Timeout for waiting an ACK from the slave.
            *
            * \param timeout_ns timeout in nano second
            */
            virtual void SetTxTimeout(Time timeout_ns)=0;

    };
} // end namespace core
} // end namespace framework

#endif // I2CPORT_H