Mity CPU Platforms » MitySOM-5CSX Altera Cyclone V

#include "i2cdevice.h"

#include <stdio.h>

#include <stdint.h>

#include <stdlib.h>

#include <linux/i2c-dev.h>

#include <sys/types.h>

#include <fcntl.h>

#include <unistd.h>

#include <sys/ioctl.h>

using namespace MityDSP;

tcI2CDevice::tcI2CDevice(int bus, int slave_addr)

: mnFd(-1)

, mnBus(bus)

, mnAddr(slave_addr)

{

}

tcI2CDevice::~tcI2CDevice(void)

{

   if (mnFd >= 0)

   {

       Close();

   }

}

int tcI2CDevice::Open(void)

{

    int ret;

    char fname[100];

    char buff[128];

    sprintf(fname,"/dev/i2c-%d",mnBus);

    mnFd = open(fname,O_RDWR);

    if (mnFd < 0) 

    {

	sprintf(buff, "tcI2CDevice::Open:%s:",fname);

	perror(buff);

        return mnFd;

    }

    ret = ioctl(mnFd, I2C_SLAVE, mnAddr);

    if (ret < 0)

    {

	perror("tcI2CDevice::Open:ioctl:");

        Close();

    }

    return ret;

}

int tcI2CDevice::Close(void)

{

    //Return success if nothing to close

    int retval = 0;

    if (mnFd >= 0)

    {

        retval = close(mnFd);

        mnFd = -1;

    }

    return retval;

}

const char* tcI2CDevice::GetError(int /* err */)

{

    return "Unknown";

}