TMS570LC4357: I2C Loopback mode for self test is not receiving complete TX buffer

Hi,

I tried Loopback mode for self test with below code

/* USER CODE BEGIN (2) */
#define own_add 0x75
#define slv_add 0x5A
#define bsize 8

uint8 TX_PACK[16]={0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,0x5A,0x5B,0x5C,0x5D};
uint8 RX_PACK[16]={0};
uint32 data;

void i2cEnableLoopback(i2cBASE_t *i2c);
/* USER CODE END */

int main(void)
{
/* USER CODE BEGIN (3) */
uint32 buf_size = bsize, i, errNum;
uint8 *t_buff = &TX_PACK[0];
uint8 *r_buff = &RX_PACK[0];

/* i2c initialization */
i2cInit();

/* set i2c own address */
i2cSetOwnAdd(i2cREG1,own_add);

/* enable internal loopback */
i2cEnableLoopback(i2cREG1);

/* Initiate Start condition for Transmission */
i2cSetStart(i2cREG1);

/* send data packets */
while(buf_size--)
{
i2cSendByte(i2cREG1,*t_buff++);
/* receive data packets */
*r_buff++ = i2cReceiveByte(i2cREG1);

asm(" nop"); //for breakpoint
}

errNum = 0;
for (i=0; i<bsize; i++){
if (RX_PACK[i] != RX_PACK[i])
errNum++;
}

/* Clear Stop Condition detect flag */
i2cClearSCD(i2cREG1);

while(1){}; /* wait forever after tx-rx complete. */
/* USER CODE END */

return 0;

}

in RX buffer, only first byte is copied .

 RX_PACK[16]={0x5A,0x0,0x0,.........}

then code gets struck at below line

while ((i2c->STR & (uint32)I2C_RX_INT) == 0U)
{
} /* Wait */

inside uint8 i2cReceiveByte(i2cBASE_t *i2c) function.

What could be problem?

2) Please find the attached snapshot 

what is meaning of "stop condition is generated by the device"?

how it impact the coding?