做一个CAN的接口板，用的是MC9S12C32单片机，下面是我写的程序，不知道对不对，但总是调不通。用DG128单片机作接受。CAN收发器用的是MAX3050。还有，datasheet上看，接收中断号为38，但总是进不去。
void can_init(void){
CANCTL0_INITRQ=1; // msCAN Initialization Mode
while(!CANCTL1_INITAK); //1 = Initialization Mode Active MSCAN has entered Initialization Mode.
CANCTL1_CANE=1; // CAN enable;
CANIDAC=0x23; //8*8 filter;
CANBTR1_TSEG_20 =5; /* Tseg2=6 */
CANBTR1_TSEG_10 =8; /* Tseg1=9 */
CANIDAR0=0x00;
CANIDAR1=0x01;
CANIDAR2=0x02;
CANIDAR3=0x03;
CANIDAR4=0x41;
CANIDAR5=0x41;
CANIDAR6=0x41;
CANIDAR7=0x41;
CANIDMR0=0xff;
CANIDMR1=0xff;
CANIDMR2=0xff;
CANIDMR3=0xff;
CANIDMR4=0xff;
CANIDMR5=0xff;
CANIDMR6=0xff;
CANIDMR7=0xff;
CANBTR0=0x63; //SJW1:SJW0=0:1;Synchronization jump width 2 Tq clock cycles
CANBTR1=0x13; //SAMP=one time;time segment 2=2 Tq clock cycles
CANCTL0_INITRQ=0; //INITRQ=0
while(CANCTL1_INITAK); // confirm that msCAN has quitted from initialization mode;
//CANRIER=0x01;
//CANTIER=0x07; //msCAN Interrupt Enable
}
void can_transmission(void){
CANTBSEL=CANTFLG;
CANTXIDR0=0x10;
CANTXIDR1=0x11;
CANTXDSR0=0x47;
CANTXDSR1=0x47;
CANTXDSR2=0x46;
CANTXDSR3=0x45;
CANTXDSR4=0x44;
CANTXDSR5=0x43;
CANTXDSR6=0x47;
CANTXDSR7=0x48;
CANTXDLR=8; //
CANTXTBPR=0x00; //设置发送缓冲区优先级
CANTFLG=CANTBSEL;
}
void main(void) {
/* put your own code here */
can_init();
EnableInterrupts;
for(;;) {can_transmission();} /* wait forever */
}
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