#include <mc9s12dp512.h>   
void SerTx(unsigned char);
void main(void)
  {
    SCI1BDH=0x0;			
    SCI1BDL=0x0D;			
    SCI1CR1=0x0;			
    SCI1CR2=0X0C;  
    while(1)
      {
        SerTx('Y');
        SerTx('E');
        SerTx('S');
      }
  }
void SerTx(unsigned char c)
  {  	
    while(!(SCI1SR1 & SCI1SR1_TDRE_MASK));
    SCI1DRL=c;				
  }