I2C send receive general setup with RTC DS1307

i am using a lib for i2c comunication lib from this site

i2c communication tivaware example

I want to communicate atexas instrument launchpad with a ds1307. I did that with an arduino and i need to learn how to do that with texas instruments launchpads.

I want to set two 3 functions:1) to set the control register 2) read the control reg 3) send the hour

#define DS1307_ADDRESS  0x68
#define DS1307_CONTROL  0x07
#define OneHertzSQP 0x10

void RtcSetCTRL(){

    I2CSend(DS1307_ADDRESS,2,DS1307_CONTROL,OneHertzSQP);

}

uint32_t RtcReadCTRL()
{
    return I2CReceive(DS1307_ADDRESS,DS1307_CONTROL);

}

void RtcDS1307adjust(){

    I2CSend(DS1307_ADDRESS,7,
    myFullCalendar.seconds,myFullCalendar.minutes,myFullCalendar.hour,
    myFullCalendar.dayOfWeek,myFullCalendar.date,myFullCalendar.month,myFullCalendar.year);

where myFullCalendar is a struct.

also there is the init,receive and send functions for the i2c in the site.

I am not concerned about the last function.

I have a led in the pin for the that when i set the control reg to 1Hz it blinks every sec.

This is what i want to see in order to be sure that i use correctly the send recieve functions. So i will be sure i can use every i2c device correctly.

When i debug the program the launchpad stacks in the functions i2csend in the AT THE LINE:

while(I2CMasterBusy(I2C0_BASE)); /////IT STOPS HERE

i give you the code from the site.

void I2CSend(uint8_t slave_addr, uint8_t num_of_args, ...)
{
    //    Tell the master module what address it will place on the bus when
    //    communicating with the slave.
    I2CMasterSlaveAddrSet(I2C0_BASE, slave_addr, false);

    //stores list of variable number of arguments
    va_list vargs;

    //specifies the va_list to "open" and the last fixed argument
    //so vargs knows where to start looking
    va_start(vargs, num_of_args);

    //put data to be sent into FIFO
    I2CMasterDataPut(I2C0_BASE, va_arg(vargs, uint32_t));

    //if there is only one argument, we only need to use the
    //single send I2C function
    if(num_of_args == 1)
    {
        //Initiate send of data from the MCU
        I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_SINGLE_SEND);

        // Wait until MCU is done transferring.
        while(I2CMasterBusy(I2C0_BASE));

        //"close" variable argument list
        va_end(vargs);
    }

    //otherwise, we start transmission of multiple bytes on the
    //I2C bus
    else
    {
        //Initiate send of data from the MCU
        I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_START);

        // Wait until MCU is done transferring.
        while(I2CMasterBusy(I2C0_BASE)); /////IT STOPS HERE

        //send num_of_args-2 pieces of data, using the
        //BURST_SEND_CONT command of the I2C module
        uint8_t i;
        for(i = 1 ; i < (num_of_args - 1) ; i++)
        {
            //put next piece of data into I2C FIFO
            I2CMasterDataPut(I2C0_BASE, va_arg(vargs, uint32_t));
            //send next data that was just placed into FIFO
            I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);

            // Wait until MCU is done transferring.
            while(I2CMasterBusy(I2C0_BASE));
        }

        //put last piece of data into I2C FIFO
        I2CMasterDataPut(I2C0_BASE, va_arg(vargs, uint32_t));
        //send next data that was just placed into FIFO
        I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH);
        // Wait until MCU is done transferring.
        while(I2CMasterBusy(I2C0_BASE));

        //"close" variable args list
        va_end(vargs);
    }
}

Do you find any problem in my functions? Why this does not work? Also i have desolder pull up resistors from the pcb in order to work in 3.3v lauchpad.

Is there any problem on the code that you see?