ioc源代码.txt

Code Warrior 4.7 Target : MC9S12XS128 Crystal: 16.000Mhz busclock:16.000MHz pllclock:32.000MHz

#include <hidef.h>      
#include <MC9S12XS128.h>
#include <stdio.h> 

#pragma LINK_INFO DERIVATIVE "mc9s12xs128" 

//-----------------------------------------------------
void setbusclock(void)
{   
    CLKSEL=0X00;				//disengage PLL to system
    PLLCTL_PLLON=1;			//turn on PLL
    SYNR=1;										
    REFDV=1;		        //pllclock=2*osc*(1+SYNR)/(1+REFDV)=32MHz;
    _asm(nop);          //BUS CLOCK=16M
    _asm(nop);
    while(!(CRGFLG_LOCK==1));	  //when pll is steady ,then use it;
    CLKSEL_PLLSEL =1;		        //engage PLL to system; 
}
//-----------------------------------------------------
static void SCI_Init(void) 
{
    SCI0CR2=0x2c; //enable Receive Full Interrupt,RX enable,Tx enable
    SCI0BDH=0x00; //busclk  8MHz,19200bps,SCI0BDL=0x1a
    SCI0BDL=0x68; //SCI0BDL=busclk/(16*SCI0BDL)                   
                  //busclk 16MHz, 9600bps,SCI0BDL=0x68                   
}                 
void uart_putchar(unsigned char ch)
{ 
  if (ch == '\n')  
  {
      while(!(SCI0SR1&0x80)) ;     
      SCI0DRL= 0x0d; //output'CR'
	    return;
  }
  if (ch == '\r')  
  {
      while(!(SCI0SR1&0x80)) ;     
      SCI0DRL= 0x0a; //output'LF'
	    return;
  }
  while(!(SCI0SR1&0x80)) ; 		    //keep waiting when not empty  
  SCI0DRL=ch;
}

void putstr(char ch[])
{
  unsigned char ptr=0;
  while(ch[ptr]){
      uart_putchar((unsigned char)ch[ptr++]);
  } 
}
//-----------------------------------------------------  
static void IOC_Init(void)
{   
    PACTL=0X50;//PT7 PIN,PACN32 16BIT,FALLing edge,NOT INTERRUPT
    TCTL3=0xc0;//c-输入捕捉7任何沿有效,             
    TCTL4=0xc0;//40表示ICx禁止, 1表示上升沿, 2表示下降沿, 3表示任何沿      
    TIE  =0x00;//每一位对应相应通道中断允许,0表示禁止中断
    TIOS =0x00;//每一位对应通道的: 0输入捕捉,1输出比较
    TCTL3_EDG7x=1;//c-输入捕捉7任何沿有效,
}  
//-----------------------------------------------------  
void Dly_ms(int ms)
{
   int ii,jj;
   if (ms<1) ms=1;
   for(ii=0;ii<ms;ii++)
     for(jj=0;jj<2670;jj++);    //busclk:16MHz--1ms
}
void main(void)
{
  char mystr[20]="";
  unsigned char LedCnt=0;
  unsigned int IOCcnt;  
  
  setbusclock();  
  SCI_Init();
  IOC_Init();
  DDRB=0xFF;
  PUCR_PUPBE=1;
  //putstr("\nLongQiu s.&t. Co. Ltd.");    
  //putstr("\nhttp://shop36265907.taobao.com"); 
  EnableInterrupts; 
  for(;;) 
  {   
    LedCnt=(LedCnt>0XFE?0:++LedCnt);
   // Dly_ms(1);   //修改延时以修改数据发送频率
    
    //低电平灯亮用这句,注释掉下面那句 
    PORTB=~LedCnt;  
        
    //高电平灯亮用这句,注释掉上面那句   
    //PORTB=LedCnt;
    

    IOCcnt=PACNT;     
    if(IOCcnt>999) PACNT=0;
    sprintf(mystr,"\n\rIOC pulses:%d",IOCcnt);
    putstr(mystr);
  }
}