[原创]DG128 CAN 问题 CAN, 原创

毛毛虫

我写了个MSCAN的程序，但调试不通，请问什么原因？
我初始化时，开了接收中断，用Loopback Self Test Mode，在CAN中断中用了断点，但是程序运行不到断点。
源程序如下：
void InitCAN(unsigned char nChan){
MODRR = 0x00;

while(!CAN0CTL1_INITAK) //Initialization Mode
CAN0CTL0_INITRQ = 1;

CAN0CTL1_CANE = 1; //Enable CAN0
CAN0CTL1_CLKSRC = 0; //Fcan = Foscclk
CAN0CTL1_LOOPB = 1; //Loopback Self Test Mode

CAN0BTR0 = 0x32; //SJW = 0,Baud Rate Prescaler = 50
CAN0BTR1 = 0xD8; //SA MP = 1,Time Segment 2 = 6,Time Segment 1 = 9

CAN0IDAC_IDAM = 0;

CAN0IDMR0 = 0xff;
CAN0IDMR1 = 0xff;
CAN0IDMR2 = 0xff;
CAN0IDMR3 = 0xff;
CAN0IDMR4 = 0xff;
CAN0IDMR5 = 0xff;
CAN0IDMR6 = 0xff;
CAN0IDMR7 = 0xff;

CAN0IDAR0 = 0x00;
CAN0IDAR1 = 0x00;
CAN0IDAR2 = 0x00;
CAN0IDAR3 = 0x00;
CAN0IDAR4 = 0x00;
CAN0IDAR5 = 0x00;
CAN0IDAR6 = 0x00;
CAN0IDAR7 = 0x00;

while(CAN0CTL1_INITAK)
CAN0CTL0_INITRQ = 0; //Normal Mode

CAN0RIER_RXFIE = 1; //Enable Receiver Full Interrupt
}

byte CAN0_SendFrame(byte BufferNum,dword CANID,byte FrameType,byte Length,byte *Data)
{
unsigned char *adr,i;

CAN0TXIDR0 = CANID >> 3;
CAN0TXIDR1 = CANID << 5;
if(FrameType) CAN0TXIDR1 |= 0x10;
else CAN0TXIDR1 &= 0xef;
CAN0TXIDR1 &= 0xf7;

adr = &CAN0TXDSR0;
for(i=0;i
CAN0TXDLR = Length;

switch(BufferNum){
case 0:
if(CAN0TFLG_TXE0) {
CAN0TFLG_TXE0 = 0;
CAN0TBSEL_TX0 = 1;
}
else return ERR_TXFULL;
break;
case 1:
if(CAN0TFLG_TXE1) {
CAN0TFLG_TXE1 = 0;
CAN0TBSEL_TX1 = 1;
}
else return ERR_TXFULL;
break;
case 2:
if(CAN0TFLG_TXE2) {
CAN0TFLG_TXE2 = 0;
CAN0TBSEL_TX2 = 1;
}
else return ERR_TXFULL;
break;
default:
return ERR_VALUE;
}
return ERR_OK;
}

#pragma CODE_SEG __NEAR_SEG NON_BANKED
interrupt 38 void CAN0RX_ISR(void) {

CAN0RFLG_RXF = 1;
}
#pragma CODE_SEG DEFAULT

void main(void) {
InitCAN(0);
EnableInterrupts;
CAN0_SendFrame(0,CANID0,0,8,buf);
for(;;) {
}
}