main.c

mc9s12dg128串口驱动程序,调试通过

#include <hidef.h>      /* common defines and macros */
#include <mc9s12dg128.h>     /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12dg128b"
// 子程序声明
void Init_PLL(void);
void Init_SCI(void);
void Send_SCI(unsigned char *);
void Receive_SCI(void);
//子程序定义

// void Init_PLL(void)
// {
 //  REFDV=0x01;//initiate the PLL clock
 //  SYNR=0x02; //Osc 16M,bus clock 24MHz
//   while(!(CRGFLG&0x08)) {
 //         }//wait until steady
//   CLKSEL=0x80;//select the PLLCLK
// }
void Init_SCI(void)
 {  //SCI0BD = 0x0271;
   SCI0BDH = 0x00;      //
   SCI0BDL = 0xD2;      //设定波特率为2400
    SCI0CR1 = 0x00;      //设置8位数据格式，关闭循环模式和奇偶检验
    SCI0CR2 = 0x08;      //禁止中断,允许发送
    
 }
 void Send_SCI(unsigned char *p) 
 {
  for(;*p!='\0';p++) 
  {
   while(!(SCI0SR1_TDRE)) ;
   SCI0DRL = *p ;
  }
 }
  

void main(void) {
 unsigned char a=65;
 unsigned char b=97;
 Init_SCI();
 EnableInterrupts;
   
  for(;;) 
  { unsigned char a[]="123456789";
    Send_SCI(a);
 // Send_SCI(b);
  } /* wait forever */
  /* please make sure that you never leave this function */
}