SJA1000 进入不了溢出中断？？？？

uint8 sja1000_init(void)

{

uint8 temp,state;



halDigioConfig(&pinALE);

halDigioConfig(&pinCS);

halDigioConfig(&pinRST);

halDigioConfig(&pinRD);

halDigioConfig(&pinWR);



memset(&canTxBuf,0,sizeof(canTxBuf));

memset(&canRxBuf,0,sizeof(canRxBuf));



halDigioClear(&pinRST);

halMcuWaitMs(100);

halDigioSet(&pinRST);



do

{

can_write_byte(SJA1000_PELI_MOD, SJA1000_PELI_MOD_AFM|SJA1000_PELI_MOD_RM);

can_read_byte(SJA1000_PELI_MOD,&state);

}

while(!(state&0x01));



can_write_byte(SJA1000_PELI_CDR, SJA1000_CDR_PELI_MOD|SJA1000_CDR_CLOCK_OFF);



can_write_byte(SJA1000_PELI_BTR0, 0x05);

can_write_byte(SJA1000_PELI_BTR1, 0x25);



can_write_byte(SJA1000_PELI_IER, SJA1000_PELI_IER_DOIE|SJA1000_PELI_IER_TIE|SJA1000_PELI_IER_RIE);



can_write_byte(SJA1000_PELI_OC, 0x1a);



can_write_byte(SJA1000_PELI_CMR, SJA1000_PELI_CMR_RRB);



can_write_byte(SJA1000_PELI_EWLR, 0xff);





for(temp=0; temp<4; temp++)

{

can_write_byte(SJA1000_PELI_ACC+temp, 0);

can_write_byte(SJA1000_PELI_ACM+temp, 0xff);

}



do

{

can_write_byte(SJA1000_PELI_MOD, SJA1000_PELI_MOD_AFM);

can_read_byte(SJA1000_PELI_MOD,&state);

}

while(state&0x01) ; 



halDigioConfig(&pinCanInt);

halDigioIntConnect(&pinCanInt, &isr_can);

halDigioIntSetEdge(&pinCanInt, HAL_DIGIO_INT_FALLING_EDGE);

halDigioIntEnable(&pinCanInt);

asm("NOP");

halDigioIntClear(&pinCanInt);



return OK;

}

void isr_can(void)

{

uint8 temp,com,state_cmr;



can_read_byte(SJA1000_PELI_IR, &temp);



if(temp & 0x08) //数据溢出中断

{



mlib_console_Printf(" !!!!!!!!CAN RXFIFO OVERFLOW_ERR!!!!!!!!!!!! \r\n");

//执行 sja1000 清除数据溢出 命令 

can_read_byte(SJA1000_PELI_CMR,&state_cmr); //读出命令寄存器状态 

can_write_byte(SJA1000_PELI_CMR,(state_cmr|SJA1000_PELI_CMR_RRB|SJA1000_PELI_CMR_CDO)); //写命令寄存器,执行 清除数据溢出 命令

can_read_byte(SJA1000_PELI_ALC, &com);

can_read_byte(SJA1000_PELI_ECC, &com);

}



if(temp & SJA1000_PELI_IR_RI) //接收中断

{

if(DEBUG_OUTPUT_ON)

{

mlib_console_Printf(" isr_can ------Rx------GO \r\n");

}



isr_can_rx();

can_write_byte(SJA1000_PELI_CMR, SJA1000_PELI_CMR_RRB);

can_read_byte(SJA1000_PELI_ALC, &com);

can_read_byte(SJA1000_PELI_ECC, &com);



if(DEBUG_OUTPUT_ON)

{

mlib_console_Printf(" isr_can ------Rx------OK \r\n");

}



}

}