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求救，F28069 SCI为什么进不了中断？

sam liu
Intellectual 561 points

F28069 SCI初始化代码如下:

 EALLOW;
 GpioCtrlRegs.GPAPUD.bit.GPIO28 = 0;    // Enable pull-up for GPIO28 (SCIRXDA)
 GpioCtrlRegs.GPAPUD.bit.GPIO29 = 0;    // Enable pull-up for GPIO29 (SCITXDA)

 GpioCtrlRegs.GPAQSEL2.bit.GPIO28 = 3;  // Asynch input GPIO28 (SCIRXDA)
 GpioCtrlRegs.GPAMUX2.bit.GPIO28 = 1;   // Configure GPIO28 for SCIRXDA operation
 GpioCtrlRegs.GPAMUX2.bit.GPIO29 = 1;   // Configure GPIO29 for SCITXDA operation

 GpioCtrlRegs.GPAPUD.bit.GPIO23 = 0;    // Enable pull-up for GPIO23 (SCIRXDB)
 GpioCtrlRegs.GPBPUD.bit.GPIO58 = 0;    // Enable pull-up for GPIO58 (SCITXDB)
 GpioCtrlRegs.GPAQSEL2.bit.GPIO23 = 3;  // Asynch input GPIO23 (SCIRXDB)
 GpioCtrlRegs.GPAMUX2.bit.GPIO23 = 3;   // Configure GPIO23 for SCIRXDB operation
 GpioCtrlRegs.GPBMUX2.bit.GPIO58 = 2;   // Configure GPIO58 for SCITXDB operation
 EDIS;

 SciaRegs.SCICCR.all =0x0007;      // 1 stop bit, 8 char bits,
 SciaRegs.SCICTL1.all =0x0003;     // enable TX, RX
 SciaRegs.SCICTL2.bit.RXBKINTENA =1;
 SciaRegs.SCIHBAUD = 0x01;
 SciaRegs.SCILBAUD = 0x03;    //baudrate set 9600

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

中断也使能了，可是就是进不了中断？

  • 0
    TI__Guru 60308 points

    sam,

    再仔细检查一下关于中断的设置：

     EALLOW;  // This is needed to write to EALLOW protected registers   

     PieVectTable.SCIRXINTA = &sciaRxIsr;   

    PieVectTable.SCITXINTA = &sciaTxIsr;   

     EDIS;

    // Enable interrupts required for this example  

      PieCtrlRegs.PIECTRL.bit.ENPIE = 1;  

     // Enable the PIE block    PieCtrlRegs.PIEIER9.bit.INTx1=1;    

     // PIE Group 9, INT1    PieCtrlRegs.PIEIER9.bit.INTx2=1;    

     // PIE Group 9, INT2    IER = 0x100; // Enable CPU INT

    另外通过仿真界面，查看RXRDY标志位有没有置一。

    Eric

  • 0 回复 Eric Ma
    Intellectual 561 points

    Eric,

    我的中断设置检查过了，接收中断是一致的，发送我用的是定时发送，但是进不了接收中断，现在我把程序改成用FIFO接收一个字就进入中断仿真就可以了，程序初始化设置如下：

     SciaRegs.SCICCR.all =0x0007;      // 1 stop bit,  No loopback
                                           // No parity,8 char bits,
                                           // async mode, idle-line protocol
     SciaRegs.SCICTL1.all =0x0003;     // enable TX, RX, internal SCICLK,
                                           // Disable RX ERR, SLEEP, TXWAKE
     SciaRegs.SCICTL2.bit.TXINTENA =0;
     SciaRegs.SCICTL2.bit.RXBKINTENA =1;
     SciaRegs.SCIHBAUD = 0x01;
     SciaRegs.SCILBAUD = 0x03;    //baudrate set 9600
     SciaRegs.SCIFFTX.all=0xC041;
     SciaRegs.SCIFFRX.all=0x0021;
     SciaRegs.SCIFFCT.all=0x00;

     SciaRegs.SCICTL1.all =0x0023;       // Relinquish SCI from Reset
     SciaRegs.SCIFFTX.bit.TXFIFOXRESET=1;
     SciaRegs.SCIFFRX.bit.RXFIFORESET=1;

    中断设置为：

    EALLOW;
     PieVectTable.TINT0 = &cpu_timer0_isr;
     PieVectTable.SCIRXINTA = &sciaRxIsr;

    EDIS；

    PieCtrlRegs.PIECTRL.bit.ENPIE = 1;   // Enable the PIE block
     PieCtrlRegs.PIEIER9.bit.INTx1=1;     // PIE Group 9, INT3 SCIATINT
     IER = 0x100; // Enable CPU INT
     //使能全局中断
     EINT;   // Enable Global interrupt INTM
     ERTM;   // Enable Global real time interrupt DBGM