main.c

freescale MC9S12DG128--an example of the Serial Communication Interface

#include <hidef.h>      /* common defines and macros */
#include <mc9s12dg128.h>     /* derivative information */


#pragma LINK_INFO DERIVATIVE "mc9s12dg128b"
 char c=1;

void putchar(char c) {
SCI0CR2=0X0C; //初始化串行口//
SCI0BDH=0X00;
SCI0BDL=0X9C;
while((SCI0SR1&0X80)==0); //串口为空，输出数据//
SCI0DRL=c;}

 
void main(void) {
c=0x42;
putchar(c); //显示一个字符//
for(;;);

}