main.c

飞思卡尔的中断和定时程序给初学者看的 学习交流

#include <hidef.h>      /* common defines and macros */
#include <mc9s12dg128.h>     /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12dg128b"



void main(void) {
  /* put your own code here */
   DDRB=0XFF;//PORTB设定为输出
 PORTB=0XFF;//PORTB初始化为全高
 

 TSCR1=0x90;//定时器使能且TFLG1能被自动清除

 TSCR2=0x0f;//定时器预分频系数设定  Prescale Factor=128
 TIE=0x01;//定时器通道0使能
 TIOS_IOS0=1;//定时器通道0设定为输出比较
 TC0=0xf73b;

  EnableInterrupts;

  for(;;) {} /* wait forever */
  /* please make sure that you never leave this function */
}
#pragma CODE_SEG NON_BANKED
 void interrupt 8 Timer(void){
  DisableInterrupts;
  int i=1;
  if(i%3==0)
  PORTB++;
 i++;}


#pragma CODE_SEG DEFAULT