[参考译文] TMS320F28069：SCI A RX 中断未被触发

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请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1033898/tms320f28069-sci-a-rx-interrupt-not-triggered

器件型号：TMS320F28069
主题中讨论的其他器件：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

}

当使用 Hyper 终端将任何字符发送到 launchpad 时、RX 中断会触发4次、仅提供0或255、之后不会触发。

4 年多前