大家好,最近一直在研究Ｃ３２的CAN 程序，也看了大家的一些资料，写了一个简单的发送程序，但是没有CAN输出，请帮忙看看.另外，好像bean 产生波特率有点问题，如500k,time_seg1=7,time_seg2=6, prescaler=1,如果8M, 则波特率＝8M/1*(1+7+6),结果不是500k. 不知是何原因？感觉freescale 的例程少，所以大家有什么好的心得可以共享，共同提高。

#include <hidef.h>      /* common defines and macros */
#include <mc9s12c32.h>     /* derivative information */

#pragma LINK_INFO DERIVATIVE "mc9s12c32"

unsigned char a[8]={0x00,0x00,0x33,0x44};

 void MSCAN0Init(void)
{ 

DDRB=0xff;
PORTB=0x0f;       //see the led on

CANCTL0_INITRQ=1; /* enter the init mode */
while(!CANCTL1_INITAK ) { };

//CANCTL1_CANE = 1; /* msCan enable */
CANCTL1 = 0x87;
CANCTL1_CLKSRC = 0x00; /* Select the clock source from crystal */
CANBTR0 = 0x40; /* set SJW=1, Prescaler value=1*/
CANBTR1 = 0x76; /* set TSEG2=7,TSEG1=8 , samle point 75% Bit Rate=500k*/

CANIDMR0 = 0xFF;
/*no filter,define to accept all coming message*/
CANIDMR1 = 0xFF;
CANIDMR2 = 0xFF;
CANIDMR3 = 0xFF;
//CAN0IDMR4 = 0xFF;
//CAN0IDMR5 = 0xFF;
//CAN0IDMR6 = 0xFF;
//CAN0IDMR7 = 0xFF;

CANCTL0_INITRQ = 0; /*enable normal operation mode*/

while(CANCTL1_INITAK != 0) { };

CANCTL0_TIME = 1;
/*enable internal time stampe*/
CANCTL0_WUPE = 1; /*WAKE UP enable*/

 }

/***************************************************************************************
  Function Name : MSCAN0Trans
****************************************************************************************/

void main(void)
 
 {
  /* put your own code here */
 

MSCAN0Init();

while(1)
  { unsigned char cansel;
   DDRB=0xFF;
 CANTBSEL = CANTFLG; /*select one available transmit buffer*/
 cansel = CANTBSEL;
 CANTXIDR0 = 0x72; /*C32:   */
 CANTXIDR1 = 0x20; /*standard ID*/
 
 CANTXDSR0 =0x55 ;
 CANTXDSR1 =0x55  ;
 CANTXDSR2 =0x44;
 CANTXDSR3 =0x44;
 CANTXDSR4 = 0x55 ;
 CANTXDSR5 =0x55; CANTXDSR6 =0x55  ;
 CANTXDSR7 =0x55   ;
 CANTXDLR = 8;
 CANTXTBPR = 0; 

 
 ORTB=~PORTB;
  }
 
  EnableInterrupts;
  for(;;) {} /* wait forever */
}