MSP432E411Y: UART interrupt of MSP432E411Y

Hi Koki,

Have you already run the UART example code on your broad and find all the functions works fine?

https://dev.ti.com/tirex/explore/node?node=ADlQUxtK5.llsv2QiWufHA__J4.hfJy__LATEST

Best regards,

Cash Hao

Hi, Cash

Yes, I would like to know if the procedure for getting the Receive Status of the UARTRSR register is correct above.

Thanks,

Koki

Hi Koki,

This procedure looks good for me. However, I still recommend you to run the example code first to avoid unpredicted issues.

Best regards,

Cash Hao

Hi, Cash Hao

This sample (uart_echo) seems to be the process of sending the received single character, and I don't think it is possible to confirm the UART error (framing error).

Is there any good way to verify the behavior of the framing error?

Thanks,

Koki

Hi,

Do you have any update?

Thanks,

Hi，

If you observe any UART error, you should get the error code in the UARTECR register. You could confirm the framing error by the check the bit 0 of the UARTECR.

Best regards,

Cash Hao

Hi,

Yes, I understand what you are saying.

However, from the sample code it seems that I can't get a "framing error".

Because the code doesn't cause framing errors.

Is there any good way to verify the behavior of the framing error?

Thanks,

Koki

Hi, Cash

I would appreciate it if you could reply as soon as possible.

Koki

Hi Koki,

Okay, you are now trying to get a framing error. Am I understanding this correctly?

Best regards,

Cash Hao

Hi, Cash

I would appreciate it if you could reply as soon as possible.

Koki

Hi Koki,

Based on the definition of the framing error.

"A UART will detect a framing error when it does not see a "stop" bit at the expected "stop" bit time. As the "start" bit is used to identify the beginning of an incoming character, its timing is a reference for the remaining bits. If the data line is not in the expected state (high) when the "stop" bit is expected (according to the number of data and parity bits for which the UART is set), the UART will signal a framing error. A "break" condition on the line is also signaled as a framing error."

If you want to generate a framing error, you need to send the data without a stop bit.

Best regards,

Cash Hao

Hi,

I got the value of UARTRSR before clearing UARTICR.

But the situation was the same, the value of UARTRSR was 0x00000000.

(The value of the UARTMIS register is 0x00000280)

The following is the source code of the part that is confirmed by interrupt.

void Uart_InterruptPeripheral(void)
{
	uint32	ui32IntStatus;					// interrupt status
	uint8	ui8IntFlags = 0x00U;			// interrupt flag
	uint32	ui32UartError = 0x00000000U;	// get UART Error
	uint8	ui8UartError = 0x00U;			// UART Error

	// Get interrupt factors (UARTMIS register)
	ui32IntStatus = UARTIntStatus(UART2_BASE, UART_REGISTER_UARTMIS);
	
	// UART error interrupt judgment
	if (((ui32IntStatus & (uint32)UART_RIS_OERIS) == (uint32)UART_RIS_OERIS) ||		// UART Overrun Error Raw Interrupt Status
		((ui32IntStatus & (uint32)UART_RIS_BERIS) == (uint32)UART_RIS_BERIS) ||		// UART Break Error Raw Interrupt Status
		((ui32IntStatus & (uint32)UART_RIS_PERIS) == (uint32)UART_RIS_PERIS) ||		// UART Parity Error Raw Interrupt Status
		((ui32IntStatus & (uint32)UART_RIS_FERIS) == (uint32)UART_RIS_FERIS))		// UART Framing Error Raw Interrupt Status
	{
		// UART error interrupt flag ON
		ui8RetIntFlags |= 0x01;
	}
	else {
		// Do Nothing
	}


	// Clear interrupt factors 
	UARTIntClear(UART2_BASE, ui32IntStatus);
	
	// UART error interrupt
	if ((ui8IntFlags & 0x01) == 0x01) {
		// Get UART Error
		ui32UartError = UARTRxErrorGet(UART2_BASE);
		// UART Overrun Error judgement
		if ((ui32UartError & (uint32)UART_RXERROR_OVERRUN) == (uint32)UART_RXERROR_OVERRUN) {
			// UART Overrun Error setting
			ui8UartError |= 0x01U;
		}
		else {
			// Do Nothing
		}

		// UART Break Error judgement
		if ((ui32UartError & (uint32)UART_RXERROR_BREAK) == (uint32)UART_RXERROR_BREAK) {
			// UART Break Error setting
			ui8UartError |= 0x02U;
		}
		else {
			// Do Nothing
		}

		// UART Parity Error judgement
		if ((ui32UartError & (uint32)UART_RXERROR_PARITY) == (uint32)UART_RXERROR_PARITY) {
			// UART Parity Error setting
			ui8UartError |= 0x04U;
		}
		else {
			// Do Nothing
		}
		// UART Framing Error judgement
		if ((ui32UartError & (uint32)UART_RXERROR_FRAMING) == (uint32)UART_RXERROR_FRAMING) {
			// UART Framing Error setting
			ui8UartError |= 0x08U;
		}
		else {
			// Do Nothing
		}
		// UART Error clear
		UARTRxErrorClear(UART2_BASE);
	}
}