main.c

飞思卡尔的SCI程序 给初学者看的 比较简单

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

int s;


void main(void) {
  /* put your own code here */
  
  SCI0BDH=0x00;
  SCI0BDL=52;
  
  SCI0CR2=0x2c;
  DDRB=0xff;
  PORTB=0x00;
  
  for(;;) {
  while(SCI0SR1_RDRF==0);
  s=SCI0DRL;
  PORTB=s;
  Delay();
  while (SCI0SR1_TDRE==0);

  SCI0DRL=s+1;
  Delay();
  
  } /* wait forever */
  /* please make sure that you never leave this function */
}
Delay(){
long i;
for(i=0;i<10000;i++);
}