Actions
Forum Thread Details
  • State Not Answered
  • Replies 5 replies
  • Subscribers 330 subscribers
  • Views 1180 views
  • Users 0 members are here
Related

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

Parents
  • 0

    Hi dicksigmund,

    Have you checked to see what the actual source of the interrupt is?

    I see you have the receive timeout interrupt enabled by XUARTPS_IXR_TOUT.  By enabling this, you should get an interrupt when the receiver does not receive a new character within the timeout period set in Rcvr_timeout_regX. 

    According to UG585, Register Rcvr_timeout_reg0 Details:

    "The read/write Receiver Timeout register is used to enable the UART to detect an idle condition on the
    receiver data line. The timeout value (RTO) indicates the maximum delay for which the UART should wait
    for a new character to arrive before issuing a timeout interrupt."

    Could you be seeing this interrupt occur during your XUartPs_Send()?

    Regards,

    -Kevin

Reply
  • 0

    Hi dicksigmund,

    Have you checked to see what the actual source of the interrupt is?

    I see you have the receive timeout interrupt enabled by XUARTPS_IXR_TOUT.  By enabling this, you should get an interrupt when the receiver does not receive a new character within the timeout period set in Rcvr_timeout_regX. 

    According to UG585, Register Rcvr_timeout_reg0 Details:

    "The read/write Receiver Timeout register is used to enable the UART to detect an idle condition on the
    receiver data line. The timeout value (RTO) indicates the maximum delay for which the UART should wait
    for a new character to arrive before issuing a timeout interrupt."

    Could you be seeing this interrupt occur during your XUartPs_Send()?

    Regards,

    -Kevin

Children
No Data