TIVA TM4C129XNCZAD I2C issue

Hi,

I try to interface TM4C129XNCZAD uC to IO expander PCA9505 thru Level translator NTS0104W.
 When we run the microcontroller using debugger with Full run action, data loaded in I2CMDR register
is not reflecting over SDA lines(monitored using Oscilloscope). But when we single step over the code,
data written in I2CMDR register reflects over SDA line. Following is my code:

Please help me in solving this issue.
Thanks & Regards,
Thangavel.P

bool I2C_WriteData(U32 v_I2Cbase_u32r, U8 v_DeviceAddress_u8r, U8 v_RegAddress_u8r,U8* p_source_u8r, 
U8 v_length_u8r)
{
            U16 v_delaycnt_u16r = 0;
            U8 v_cnt_u8r = 0;
            if( ROM_I2CMasterBusy(I2C9_BASE) == true
               /*Is I2C port busy?*/)
            {
                /*I2C port is busy. So return false*/
                        return(false);
            }
            else
            {
               ROM_I2CMasterSlaveAddrSet(I2C9_BASE, v_DeviceAddress_u8r, false);
               ROM_I2CMasterDataPut(I2C9_BASE, v_RegAddress_u8r);
               ROM_I2CMasterControl(I2C9_BASE, I2C_MASTER_CMD_BURST_SEND_START);
                do{
                   //wait till I2C is busy
                    while(ROM_I2CMasterBusy(I2C9_BASE));
                    //check for error
                    if( ROM_I2CMasterErr(I2C9_BASE) != I2C_MASTER_ERR_NONE)
                     {
                                //error. Issue Stop and return false
                                ROM_I2CMasterControl(I2C9_BASE, I2C_MASTER_CMD_BURST_SEND_STOP);
                                return(false);
                     }
                    if(v_cnt_u8r <= (v_length_u8r-1))
                    {
                                //copy the data to I2C data register
                                ROM_I2CMasterDataPut(I2C9_BASE, *p_source_u8r);
                                if(v_cnt_u8r < (v_length_u8r-1))
                                 {
                                         //start txmitting data
                                         ROM_I2CMasterControl(I2C9_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);
                                 }
                                 else
                                 {
                                          //start txmitting data
                                          ROM_I2CMasterControl(I2C9_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH);
                                 }
                           }
                           p_source_u8r++;
                           v_cnt_u8r++;
               }while(v_cnt_u8r < v_length_u8r);
               while(ROM_I2CMasterBusy(I2C9_BASE));
               return(true);
            }
}