飞思卡尔单片机DZ60---SCI(中断发送)

#include <hidef.h> /* for EnableInterrupts macro */
#include "derivative.h" /* include peripheral declarations */


#define LED_D1      PTDD_PTDD0
#define LED_D1_DIR  PTDDD_PTDDD0

#define LED_ON      0
#define LED_OFF     1

unsigned char SCANF_SEND_STRINGS[] = "HELLO MCU WORLD";
unsigned char *pSendString = SCANF_SEND_STRINGS;

/*************************************************************/
/*                  初始化总线时钟PEE模式                    */
/*              外部晶振频率为4MHz，总线频率16MHz            */
/*************************************************************/
void INIT_MCG(void) 
{
  MCGC2=0x36;        
  while(!MCGSC_OSCINIT);     
  MCGC1=0xb8;
  while(MCGSC_IREFST);
  while(MCGSC_CLKST!=0b10);
  MCGC2_LP = 1;
  MCGC1 = 0x90;
  MCGC3 = 0x48;     
  MCGC2_LP = 0;
  while(!MCGSC_PLLST);
  while(!MCGSC_LOCK);
  MCGC1 = 0x10;
  while(MCGSC_CLKST!=0b11);
} 





void delay(void) 
{
  unsigned int i;
  unsigned int j;
   
   
  for(i = 0; i < 100; i++)
     for(j = 0; j < 4000; j++);
  
}


void main(void) {

  DisableInterrupts;
  SOPT1 = 0;
  INIT_MCG();
  EnableInterrupts; /* enable interrupts */
  /* include your code here */
  
  LED_D1_DIR = 1;
  LED_D1     = LED_OFF;
  
  
  
 //以下为设置波特率，以及初始化SCI1控制寄存器  
  SCI1BDH = 0X00;
  SCI1BDL = 0X68;//波特率设置为9600
  SCI1C1 = 0x00; //设置SCI1为正常模式，八位数据位，无奇偶校验
  SCI1C2 = 0x88; //TIE = 1(bit7) 启动TDRE中断,发送中断使能
                 //手册指出，如果设置了发送中断使能TIE位，每当TDRE = 1时都请求硬件中断
                 //TE  = 1(bit3) 发送器打开
  while(1);

  for(;;) {
    __RESET_WATCHDOG(); /* feeds the dog */
  } /* loop forever */
  /* please make sure that you never leave main */
}


/*************************************************************/
/*                SCI1中断向量函数                           */
/*                向量编号为18，中断来源TDRE,TC              */
/*************************************************************/
interrupt 18 void SCI1_SEND(void)
{
  while(*pSendString != '\0') 
  {
    while(!SCI1S1_TDRE);
    SCI1D = *pSendString;
    pSendString++;
    LED_D1 = ~ LED_D1;
//    delay();
  }
  	
}