main.c

led流水灯 飞思卡尔专用程序 来自中国矿业大学大学生科技联盟

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

void  delay(void);

void main(void) 
{    DDRB=0Xff;
  /* put your own code here */
  EnableInterrupts;
  while(1){
 
 
  PORTB=0b00001110;
  delay();
    PORTB=0b00001101;
  delay();
    PORTB=0b00001011;
  delay();
    PORTB=0b00000111;
  delay();
  
  }
  
  /* wait forever */
  /* please make sure that you never leave this function */
}
  void delay(void) {
  int i,j;
  for(i=1;i<25;i++)
  for(j=1;j<3356;j++);
  }