I2c.h

/*
 * I2c.h
 *
 *  Created on: Oct 14, 2013
 *      Author: Victor Zappi
 */

#ifndef I2C_H_
#define I2C_H_

#include <iostream>
#include <iomanip>
#include <string>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#include <sys/ioctl.h>
#include <stropts.h>

#define MAX_BUF_NAME 64

using namespace std;


class I2c
{

protected:
        int i2C_bus;
        int i2C_address;
        int i2C_file;

public:
        int initI2C_RW(int bus, int address, int file);
        virtual int readI2C() = 0;
        int closeI2C();

        virtual ~I2c();

};


inline int I2c::initI2C_RW(int bus, int address, int fileHnd)
{
        i2C_bus         = bus;
        i2C_address = address;
        i2C_file        = fileHnd;

        // open I2C device as a file
        char namebuf[MAX_BUF_NAME];
        snprintf(namebuf, sizeof(namebuf), "/dev/i2c-%d", i2C_bus);

        if ((i2C_file = open(namebuf, O_RDWR)) < 0)
        {
                        cout << "Failed to open " << namebuf << " I2C Bus" << endl;
                        return(1);
        }

        // target device as slave
        if (ioctl(i2C_file, I2C_SLAVE, i2C_address) < 0){
                        cout << "I2C_SLAVE address " << i2C_address << " failed..." << endl;
                        return(2);
        }

        return 0;
}



inline int I2c::closeI2C()
{
        if(close(i2C_file)>0)
        {
                cout << "Failed to close  file "<< i2C_file << endl;
                return 1;
        }
        return 0;
}


inline I2c::~I2c(){}


#endif /* I2C_H_ */