TMS320F28069: SCI A RX INTERRUPT NOT TRIGGERED

Zenith Exports

Part Number: TMS320F28069
Other Parts Discussed in Thread: C2000WARE

__interrupt void
sciaRxFifoIsr(void)
{
    Uint16 i;
    for(i=0;i<2;i++)
    {
        rdataA[i]=SciaRegs.SCIRXBUF.all;  // Read data
    }
    rdata_pointA = (rdata_pointA) & 0x00FF;

    SciaRegs.SCIFFRX.bit.RXFFOVRCLR=1;   // Clear Overflow flag
    SciaRegs.SCIFFRX.bit.RXFFINTCLR=1;   // Clear Interrupt flag

    PieCtrlRegs.PIEACK.all|=0x100;       // Issue PIE ack
}

   EALLOW;
   GpioCtrlRegs.GPBMUX1.bit.GPIO34 = 0;   // GPIO42 = GPIO
   GpioCtrlRegs.GPBDIR.bit.GPIO34  = 1;   // GPIO42 = OUTPUT LED
   EDIS;

   PieCtrlRegs.PIECTRL.bit.ENPIE = 1;   // Enable the PIE block
   PieCtrlRegs.PIEIER9.bit.INTx1=1;     // PIE Group 9, INT1
   IER = 0x100;                         // Enable CPU INT
   EINT;

for(;;)

{}

}

void SCIA_INIT()
{
    SciaRegs.SCICCR.all =0x0007;
    SciaRegs.SCICTL1.all =0x0003;
    SciaRegs.SCICTL2.bit.TXINTENA =1;
    SciaRegs.SCICTL2.bit.RXBKINTENA =1;
    SciaRegs.SCIHBAUD = ((Uint16)SCI_PRD) >> 8;
    SciaRegs.SCILBAUD = SCI_PRD;

    SciaRegs.SCICTL1.all =0x0023;       // Relinquish SCI from Reset

}

When the Hyper terminal is used to send any char to the launchpad then the RX Interrupt triggers 4 times and gives only 0 or 255 and doesn't triggers after that.

over 5 years ago

0 Aditya Dholakia over 5 years ago

TI__Expert 7210 points

Hi,

The value 0-255 is because of the 8 bit transmission that you've set. Additionally, the interrupt triggering can be set as per the FIFO levels. I do not see that you've enabled the FIFO in your code. You can enable the FIFO and set the depth as per the application use case using which you'll be able to adjust the interrupt rate.

Thanks,

Aditya

0 Zenith Exports over 5 years ago

Prodigy 30 points

I want to use SCI with interrupt functionalities that can receive 2 Bytes of data from the Transmitter side which is sending
First byte is for Address and Second Byte is Variable.

0 Aditya Dholakia over 5 years ago in reply to Zenith Exports

TI__Expert 7210 points

Did you try the reference example provided in C2000Ware? It is configured for 2 byte with interrupts but uses loopback. You can configure the example without loopback for ease of use.

Aditya

0 Aditya Dholakia over 5 years ago in reply to Aditya Dholakia

TI__Expert 7210 points

Since we haven't heard back from you on this query, I believe you've been able to resolve the issue. I am marking this thread as resolved for now. In case you have any additional queries, feel free to continue the discussion here. If the thread locks, you can always ask a new question.

Aditya

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TMS320F28069: SCI A RX INTERRUPT NOT TRIGGERED