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UART Interrupt

Former Member

Hello everybody

I have read the xuartps.h. It is written that we can enable which interrupt by setting the interrupt mask according to this condition:
- A change in the modem signals
- Data in the receive FIFO for a configurable time without receiver activity
- A parity error
- A framing error
- An overrun error
- Transmit FIFO is full
- Transmit FIFO is empty
- Receive FIFO is full
- Receive FIFO is empty
- Data in the receive FIFO equal to the receive threshold

I got example from Xilinx SDK. The interrupt mask can be set as:
IntrMask = XUARTPS_IXR_TOUT | XUARTPS_IXR_PARITY | XUARTPS_IXR_FRAMING | XUARTPS_IXR_OVER | XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_RXFULL | XUARTPS_IXR_RXOVR;

But when I change it to:
IntrMask = XUARTPS_IXR_TOUT | XUARTPS_IXR_RXFULL | XUARTPS_IXR_RXOVR;

The program is still interrupted when I send something to the uart using XUartPs_Send.

Can anybody hep me? Thanks before

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  • 0

    I have checked the actual source of interrupt by using event checking in my handler:
    if (Event == XUARTPS_EVENT_SENT_DATA) {
    txil_printf("Ar
    ");
    }

    In my main program, I send a character by using:
    XUartPs_Send(&UartPs, "test", 4);

    The console printed out: testA

    Thus, I concluded that the interrupt still occurred when I send something via UART. Is there anything wrong with my method in defining the Interrupt Mask?

    Thank you very much for your reply, Kevin.

  • 0 in reply to Former Member

    Hi

    First thing, do not use time out interrupt on receiver. Second thing is remove the printf, because it is not preferable to use printf statement in ISR. Use send method only. One more thing which i observed, you are sending data from two places 1) one from main using send method and one from ISR using printf. This can cause data corruption, So only use send in ISR and send only one byte and see whether you are still getting interrupt or not. I hope, this will work.

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  • 0 in reply to Former Member

    Hi

    First thing, do not use time out interrupt on receiver. Second thing is remove the printf, because it is not preferable to use printf statement in ISR. Use send method only. One more thing which i observed, you are sending data from two places 1) one from main using send method and one from ISR using printf. This can cause data corruption, So only use send in ISR and send only one byte and see whether you are still getting interrupt or not. I hope, this will work.

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