xs128_main.c

MC9S12XS128单片机

#include <hidef.h>      /* common defines and macros */
#include <MC9S12XS128.h>     /* derivative information */
#include <stdlib.h>
#pragma LINK_INFO DERIVATIVE "mc9s12xs128"

#define uint unsigned int
#define TIME_INTER 500  //100个10Ms=1s
unsigned int m,Get_pulse;

void Delay(uint Time)          //延时MS
{
  uint i,j;
   for(i=0;i<Time;i++)
      for(j=0;j<0x7ff;j++);         //0x7ff;;;busclk:24MHz--1ms       
}


//-------------------------------------------------
void Pwmduoji(void) 
{   static k=0;
    if(k)
      PWMDTY23-=100;
    else 
      PWMDTY23+=100;
    if(PWMDTY23>=12500) {
      PORTB=0X00;k=1;Delay(1000);
    }
    if(PWMDTY23<=5500) {
      PORTB=0X00;k=0;Delay(1000);
    }

}


//-------------------------------------------------
void TimerOverflow(void)
{                              
    unsigned char i=1,j=0x80;
  	while((i!=0)&&(j!=0))
  	{
  	PORTB=~(i|j);
   	i<<=1;
  	j>>=1;
   Delay(1000);
  Pwmduoji();
  	}
	
}
 
 
//  uint i=PWMDTY2;
//  uint j;
//  j=i%100;
//  switch(j) {
 //   case 0: {PORTB=0X1F;Delay(2000);break;} 
 //   case 1: PORTB=0X0FE; break;
 //   case 2: PORTB=0X0FD; break;
 //   case 3: PORTB=0X0FB; break;
 //   case 4: PORTB=0X0F7; break;
 //   case 5: PORTB=0X0EF; break;
 //   case 6: PORTB=0X0DF; break;
 //   case 7: PORTB=0X0BF; break;
 //   case 8: PORTB=0X7F;  break;
 //   case 9: PORTB=0X3F;  break; 
 //           }
  



//-----------------------------------------------------
void setbusclock(void)
{   
    CLKSEL=0X00;    //disengage PLL to system
    PLLCTL_PLLON=1;   //turn on PLL
    SYNR=2;          
    REFDV=1;          //pllclock=2*osc*(1+SYNR)/(1+REFDV)=48MHz;
    _asm(nop);          //BUS CLOCK=24M
    _asm(nop);
    while(!(CRGFLG_LOCK==1));   //when pll is steady ,then use it;
    CLKSEL_PLLSEL =1;          //engage PLL to system; 
}
//-----------------------------------------------------




void Timerch0Init(void)
{
   TSCR2_PR   =0x04;  //prescale factor is 16, bus clock/16=24Mhz/16=1500000
   TIOS       =0x01;  //0 channel output compare
   TC0        =0x3A98;//channel 0 output compare holding register 0x3A98*(1/1500000)=10ms
   TCTL2      =0x02;	 //output  low level
   TSCR1_TFFCA=1;  	 // if set, TFLG1 can be cleared auto, manual clear is useless
   TIE=0x81;  //Timer0 Interrupt enable 
   TSCR1_TEN  = 1;      //Timer enable

  //TCTL3 = 0X80;       //IOC7 下降沿捕捉脉冲 edg7a deg7b
  PACTL = 0x40;       // 使能   0事件 0下降沿    16位累加器IOC7
  PACNT = 0X0000;
}

//-----------------------------------------------------
//----------------------------------------------------- 
//-----------------------------------------------------  


void Pwminitial(void)
{
  PWME=0X00;
  PWMPOL=0X0B;		//通道0,1,3输出波形开始极性为1  output waveform which high first then low when the duty counter is reached
  PWMCAE=0x00;    //左对齐输出模式            output left align waveform
  PWMCLK=0X0B;    //PWM时钟源为SA,SB               SAClock SA is the clock source for PWM channel 0
  PWMPRCLK=0X14;  //时钟A 16分频                Clock A is 24MHz/16=1.5MHz
                  //时钟B 2分频                Clock B is 12MHz
  PWMSCLA=250;   //时钟SA为1.5MHz/250/2        Clock SA is 1.5MHz/250/2=3KHz
  PWMSCLB=1;   //时钟SB为12MHz/1/2        Clock SB is 12MHz/1/2=6MHz
  
  PWMCTL=0X20;
  PWMPER0=3;    //设定输出周期=通道时钟周期3KHz/3=1khz
  PWMPER1=30;    //设定输出周期=通道时钟周期3KHz/30=100hz
  PWMPER23=60000;    //设定输出周期=通道时钟周期6MHz/60000=100Hz
  
  PWMDTY0=1;		  //占空比初始为0    Duty is 50%,and PWM waveform's frequent is 16  
  PWMDTY1=16;		  //占空比初始为0    Duty is 50%,and PWM waveform's frequent is 16  
  PWMDTY23=9000;		  //占空比初始为0    Duty is 50%,and PWM waveform's frequent is 16  
  
  PWME=0X0B;			//通道0,1,3使能                 enable pwm channel 0

}

void ADCInit()
{
  ATD0CTL1=0x0F; //8位精度
  ATD0CTL2=0x40; //快速清零//AD模块上电, 快速清零, 无等待模式, 禁止外部触发, 中断禁止
  ATD0CTL3=0xA0; //右对齐 NO FIFO,FREEZE继续// 每个序列4次转换, No FIFO, Freeze模式下继续转换
  ATD0CTL4=0x07; //4周期 // 8位精度, 2个时钟, ATDClock=[BusClock*0.5]/[PRS+1]  ; PRS=7, divider=8
  ATD0CTL5=0x20; //连续，单通道//右对齐无符号，单通道采样，通道0 
  ATD0DIEN=0x00; // 禁止数字输入
}


void main(void)
{  
DisableInterrupts;

setbusclock();
Timerch0Init();
Pwminitial();
ADCInit();  
DDRB=0XFF;
PORTB=0X0F0;

//---------------------------------------------------    

for(;;) { 
  
  EnableInterrupts; 
  //while(!ATD0STAT2_CCF0);   //等待转换结束	  
  //PORTB = (byte)ATD0DR0;    //在B口显示转换值
  //TimerOverflow();
  } /* wait forever */
  /* please make sure that you never leave this function */
}


//----------------------interrupt------------------------------    

#pragma CODE_SEG NON_BANKED  

//#pragma CODE_SEG __NEAR_SEG NON_BANKED
interrupt 8 void timerch0(void)           //10ms
{  
  static unsigned int number_count=0;

  DisableInterrupts;
  m=TCNT;
  TC0=m+0x3A98;
  PORTB ^=0xff ;
  
 
  
  number_count ++;

  if( number_count==TIME_INTER)        //1秒取一次
    {
    number_count=0;
    Get_pulse = PACNT; 
    PACNT = 0X0000;

    }
    
}