2812无法进入SCI串口发送中断子程序

只看该作者 · 2016-10-10 19:53

也是书上的例子，自己学习过程中发现：2812无法进入SCI串口发送中断子程序，但是能正常进入接受中断子程序，求大神解释！程序如下：

void InitSci(void)
{
      // Initialize SCI-A:


      /* loopback 8 bit data */
      SciaRegs.SCICCR.all = 0x07;       // 1 bit stop, disable parity, idle mode, 8 bits data

      SciaRegs.SCICTL1.all = 0x03; // enable TX  RX

      //SciaRegs.SCICTL2.all = 0x02; //
      SciaRegs.SCICTL2.bit.RXBKINTENA=1;
      SciaRegs.SCICTL2.bit.TXINTENA=0;//0和1试过


      SciaRegs.SCIHBAUD = 0x00;
      SciaRegs.SCILBAUD = 0xF3;



      PieCtrl.PIEIER9.bit.INTx1 = 1;
      PieCtrl.PIEIER9.bit.INTx2 = 1;


      SciaRegs.SCICTL1.bit.SWRESET=1;

}

interrupt void SCIRXINTA_ISR(void)    // SCI-A
{

            Sci_VarRx = SciaRegs.SCIRXBUF.all;

            i++;
            if(i == 6)
            {
                     //SciaRegs.SCITXBUF= Sci_VarRx[0];
                     Send_Flag = 1;
                     i = 0;
            }
      PieCtrl.PIEACK.bit.ACK9 = 1;
      EINT;
}

interrupt void SCITXINTA_ISR(void)    // SCI-A
{
               if((Send_Flag == 1)&&(SciaRegs.SCICTL2.bit.TXRDY==1))
            {
               SciaRegs.SCITXBUF= Angle[0][j];

                  j++;
                  if(j>=6)Send_Flag = 0;
            }

PieCtrl.PIEACK.bit.ACK9 = 1;
      EINT;
}

#include "DSP28_Device.h"
unsigned int Sci_VarRx[6];
int Angle[10][6];
unsigned int i=0,j=0,k=0;
unsigned int Send_Flag=0;
//#define  SCIA_INT  1

void main(void)
{

      /*初始化系统*/
      InitSysCtrl();

      /*关中断*/
      DINT;
      IER = 0x0000;
      IFR = 0x0000;

      /*初始化PIE中断*/
      InitPieCtrl();

      /*初始化PIE中断矢量表*/
      InitPieVectTable();

      /*初始化SCIA寄存器*/
InitSci();

for(i = 0; i < 6; i++)
{
         Sci_VarRx = 0;
}

for(i = 0; i < 10; i++)
{

      for(j = 0; j < 6; j++)
      {

         Angle[j]=k;
         k++;


      }

}

  //  i = 0;
///j = 1;
// Send_Flag = 0;

  //  #if SCIA_INT
      /*设置中断服务程序入口地址*/
      ///EALLOW;       // This is needed to write to EALLOW protected registers
      //PieVectTable.TXAINT = &SCITXINTA_ISR;
      //PieVectTable.RXAINT = &SCIRXINTA_ISR;
      //EDIS; // This is needed to disable write to EALLOW protected registers
      IER |= M_INT9;/*开中断*/
      EINT; // Enable Global interrupt INTM
      ERTM;       // Enable Global realtime interrupt DBGM

i=0;
j=0;
      for(;;)
      {
   // for(k= 0; k< 50000; k++){}

         //SciaRegs.SCIRXST.bit.RXRDY
}


}