急！！DSP的SCI进不去接收中断-TI中文支持网

不用FIFO。串口向DSP发送数据时，RXBUF中有数据，但是进不去中断，怎么办？求助各位大神

#include "DSP28x_Project.h" // Device Headerfile and Examples Include File

void scib_init(void);
void scib_fifo_init(void);
void scib_xmit(int a);
void configGPIO(void);
__interrupt void SCIRXINTb_ISR(void);
__interrupt void cpu_timer0_isr(void);

Uint16 LoopCount=0;
Uint16 ErrorCount;
Uint16 sci_count;
Uint16 ReceiveChar;
Uint16 Char;
unsigned char Navdata[85];

void main(void)
{

InitSysCtrl();
configGPIO();
DINT;
InitPieCtrl();
IER = 0x0000;
IFR = 0x0000;
InitPieVectTable();

    EALLOW;
    PieVectTable.TINT0 = &cpu_timer0_isr;
    PieVectTable.SCIRXINTB= &SCIRXINTb_ISR;
    EDIS;

    InitScibGpio();
    scib_fifo_init();    // Initialize the SCI FIFO
    scib_init(); // Initalize SCI for digital loop back

InitCpuTimers();
ConfigCpuTimer(&CpuTimer0,90,1000000);

CpuTimer0Regs.TCR.all = 0x4000;

    IER = 0x101; // Enable CPU INT
    PieCtrlRegs.PIECTRL.bit.ENPIE = 1;
    PieCtrlRegs.PIEIER1.bit.INTx7 = 1;
    PieCtrlRegs.PIEIER9.bit.INTx3 = 1;     // PIE Group 9, INT3   Receive Navigation information

EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM

for(;;)
{

}

void scib_init()
{
  ScibRegs.SCICCR.all =0x0007;   // 1 stop bit, No loopback
                                   // No parity,8 char bits,
                                   // async mode, idle-line protocol
ScibRegs.SCICTL1.all =0x0003; // enable TX, RX, internal SCICLK,
                                   // Disable RX ERR, SLEEP, TXWAKE
ScibRegs.SCICTL2.all =0x0003;
ScibRegs.SCICTL2.bit.TXINTENA =1;
ScibRegs.SCICTL2.bit.RXBKINTENA =1;
    ScibRegs.SCIHBAUD    =64>>8;
    ScibRegs.SCILBAUD    =64 & 0x00FF;//38400波特率

ScibRegs.SCICCR.bit.LOOPBKENA =0;
ScibRegs.SCICTL1.all =0x0023; // Relinquish SCI from Reset
}

void scib_xmit(int a)
{
ScibRegs.SCITXBUF=a;
}

void scib_fifo_init()
{
    ScibRegs.SCIFFTX.all=0xE040;
    ScibRegs.SCIFFRX.all=0x2044;
    ScibRegs.SCIFFCT.all=0x0;

}

void configGPIO(void)
{
EALLOW;

GpioCtrlRegs.GPAMUX2.bit.GPIO20 = 0; //配置为通用I/O口
GpioCtrlRegs.GPAMUX2.bit.GPIO21 = 0;

GpioCtrlRegs.GPADIR.bit.GPIO20 = 1; //作为输出I/O
GpioCtrlRegs.GPADIR.bit.GPIO20 = 1;

GpioDataRegs.GPADAT.bit.GPIO20 = 0;
GpioDataRegs.GPADAT.bit.GPIO21 = 1;

EDIS;
}

__interrupt void SCIRXINTb_ISR(void) // SCI-B-RX Receive Navigation
{

int i;
for (i=0;i<16;i++)
Navdata[i] = ScibRegs.SCIRXBUF.all;

PieCtrlRegs.PIEACK.all = PIEACK_GROUP9;
}
interrupt void cpu_timer0_isr(void)
{
ErrorCount++;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

//===========================================================================
// No more.
//===========================================================================

Mia Zhu：

求助?