RM46L852: SCI Self Test Error Injection problems

Hi.

I'm trying to get SCI Error injection result through loop back test.

But I didn't get to want result.

Documen SPNU551B, SCI7 : Frame Error Dectection.

I implemented Frame Error Injection through loob back mode. 

No Interrupt occured.

My code is follow by: 

---------------------------------------------------------------------------------------------

{

.................

sciInit();

while(sciIsIdleDetected(sciREG))
{
/* NOP */
};

sciREG->GCR1 = sciREG->GCR1 | (uint32)((uint32)1 << 16U)  /* Loop back Enable */

sciEnableLoopback(sciREG, Digital_Lbk);

sciREG->IODFTCTRL = sciREG->IODFTCTRL | (uint32)((uint32)1 << 26U);      /* enable Frame Error in Loopback Test Mode */

........................wait for interrupt ....................................

sciDisableLoopback(sciREG);

sciREG->GCR1 = sciREG->GCR1 | (uint32)~((uint32)1 << 16U);   /* Loopback mode disable */

-----------------

}

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void sciNotification(sciBASE_t *sci, uint32 flags)
{
/* enter user code between the USER CODE BEGIN and USER CODE END. */
/* USER CODE BEGIN (29) */
switch(flags)
{
case SCI_FE_INT:

sciREG->IODFTCTRL = sciREG->IODFTCTRL & (uint32)~((uint32)1 << 26U);   /* Disable Frame Error in Loopback mode */

(void)SerialPutString("\r\n Loopback Test Mode : Frame Error has Occured!!!\r\n");

break;

case SCI_RX_INT:
SciInterrupt();
break;

default:
break;
}
/* USER CODE END */

}

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void sciInit(void)
{
/* USER CODE BEGIN (2) */
/* USER CODE END */

/** @b initialize @b SCI */

/** - bring SCI out of reset */
sciREG->GCR0 = 0U;
sciREG->GCR0 = 1U;

/** - Disable all interrupts */
sciREG->CLEARINT = 0xFFFFFFFFU;
sciREG->CLEARINTLVL = 0xFFFFFFFFU;

/** - global control 1 */
sciREG->GCR1 = (uint32)((uint32)1U << 25U) /* enable transmit */
| (uint32)((uint32)1U << 24U) /* enable receive */
| (uint32)((uint32)1U << 5U) /* internal clock (device has no clock pin) */
| (uint32)((uint32)(1U-1U) << 4U) /* number of stop bits */
| (uint32)((uint32)0U << 3U) /* even parity, otherwise odd */
| (uint32)((uint32)0U << 2U) /* enable parity */
| (uint32)((uint32)1U << 1U); /* asynchronous timing mode */

/** - set baudrate */
sciREG->BRS = 6U; /* baudrate */

/** - transmission length */
sciREG->FORMAT = 8U - 1U; /* length */

/** - set SCI pins functional mode */
sciREG->PIO0 = (uint32)((uint32)1U << 2U) /* tx pin */
| (uint32)((uint32)1U << 1U); /* rx pin */

/** - set SCI pins default output value */
sciREG->PIO3 = (uint32)((uint32)0U << 2U) /* tx pin */
| (uint32)((uint32)0U << 1U); /* rx pin */

/** - set SCI pins output direction */
sciREG->PIO1 = (uint32)((uint32)0U << 2U) /* tx pin */
| (uint32)((uint32)0U << 1U); /* rx pin */

/** - set SCI pins open drain enable */
sciREG->PIO6 = (uint32)((uint32)0U << 2U) /* tx pin */
| (uint32)((uint32)0U << 1U); /* rx pin */

/** - set SCI pins pullup/pulldown enable */
sciREG->PIO7 = (uint32)((uint32)0U << 2U) /* tx pin */
| (uint32)((uint32)0U << 1U); /* rx pin */

/** - set SCI pins pullup/pulldown select */
sciREG->PIO8 = (uint32)((uint32)1U << 2U) /* tx pin */
| (uint32)((uint32)1U << 1U); /* rx pin */

/** - set interrupt level */
sciREG->SETINTLVL = (uint32)((uint32)0U << 26U) /* Framing error */
| (uint32)((uint32)0U << 25U) /* Overrun error */
| (uint32)((uint32)0U << 24U) /* Parity error */
| (uint32)((uint32)0U << 9U) /* Receive */
| (uint32)((uint32)0U << 8U) /* Transmit */
| (uint32)((uint32)0U << 1U) /* Wakeup */
| (uint32)((uint32)0U << 0U); /* Break detect */

/** - set interrupt enable */
sciREG->SETINT = (uint32)((uint32)1U << 26U) /* Framing error */
| (uint32)((uint32)1U << 25U) /* Overrun error */
| (uint32)((uint32)0U << 24U) /* Parity error */
| (uint32)((uint32)1U << 9U) /* Receive */
| (uint32)((uint32)0U << 1U) /* Wakeup */
| (uint32)((uint32)0U << 0U); /* Break detect */

/** - initialize global transfer variables */
g_sciTransfer_t[0U].mode = (uint32)0U << 8U;
g_sciTransfer_t[0U].tx_length = 0U;
g_sciTransfer_t[0U].rx_length = 0U;

/** - Finaly start SCI */
sciREG->GCR1 |= 0x80U;

}

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That's all.

I'd like to get a advise what my miss .

Looking forward to response.

best regards.

Gene