main.c

关于mc9s12dg128的端口输入程序

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

word i;
/*-------初始化----------*/
void InputInit(){
  TIOS=0XFE;     //channel 0 input capture
  TCTL4=0X03;    //capture rising edge
  TSCR2=0X07;    //64KHZ
  TIE=0X01;      //channel 0 interrupt enable
  TSCR1=0X90;    //Timer enable
}
/*-----------------------*/


void main(void) { 
  DDRB=0XFF;
  PORTB=0X00;
  InputInit();

  for(;;){
  EnableInterrupts;
  }
}

/*-------中断服务子程序----------*/
interrupt void   InputInt(void){
DisableInterrupts;
i=TC0;
PORTB=(char)i;
}