main.c

智能车XS128芯片 LED测试程序.仅供参考

#include <hidef.h>      /* common defines and macros */
#include <MC9S12XS128.h>     /* derivative information */


#pragma LINK_INFO DERIVATIVE "mc9s12xs128"


#pragma CODE_SEG __NEAR_SEG NON_BANKED 
void interrupt 20  SCI0_ISR(void)
{     
  SCI0CR2_RIE=0;
  //此处为串口中断需要处理的事情
  uart_putchar(uart_getkey());
  PORTA_PA0=~PORTA_PA0;
  SCI0CR2_RIE = 1;    
}

#pragma CODE_SEG DEFAULT 

//-----------------------------------------------------
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; //出口波特率为9600
    SCI0BD =0x68; //SCI0BDL=busclk/(16*SCI0BDL)
                  //busclk  8MHz, 9600bps,SCI0BD=0x34
                  //busclk 16MHz, 9600bps,SCI0BD=0x68
                  //busclk 24MHz, 9600bps,SCI0BD=0x9C
}                 //busclk 32MHz, 9600bps,SCI0BD=0xD0
                  //busclk 40MHz, 9600bps,SCI0BD=0x106
//-----------------------------------------------------  
void AD_Init(void) 
{  
  
  ATD0CTL1=0x00;   //7:1-外部触发,65:00-8位精度,4:放电,3210:ch
  ATD0CTL2=0x40;   //禁止外部触发, 中断禁止    
  ATD0CTL3=0xa0;   //右对齐无符号,每次转换4个序列, No FIFO, Freeze模式下继续转    
  ATD0CTL4=0x01;   //765:采样时间为4个AD时钟周期,ATDClock=[BusClock*0.5]/[PRS+1]
  ATD0CTL5=0x30;   //6:0特殊通道禁止,5:1连续转换 ,4:1多通道轮流采样
  ATD0DIEN=0x00;   //禁止数字输入 
} 
//-----------------------------------------------------  
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
} 
byte ReadATD(byte ch)
{
  byte ad=0;  
  while(!ATD0STAT0_SCF);
  switch(ch)
  {
    default:
    case 0:
      ad= ATD0DR0L;
    break;
    case 1:
      ad= ATD0DR1L;
    break;
    case 2:
      ad= ATD0DR2L;
    break;
    case 3:
      ad= ATD0DR3L;
    break;
    case 4:
      ad= ATD0DR4L;
    break;
    case 5:
      ad= ATD0DR5L;
    break;
    case 6:
      ad= ATD0DR6L;
    break;
    case 7:
      ad= ATD0DR7L;
    break;   
  }
  return ad;
}
void main(void){
  unsigned char LedCnt=0;
  int fenwei=0,gewei=0;  
  
  setbusclock();  
  SCI_Init();
  AD_Init();
  DDRA=0xFF;
  PUCR_PUPAE=1;
  putstr("\nLongQiu s.&t.\n");         
  EnableInterrupts;  

  for(;;) 
  {   
    LedCnt=(LedCnt>0XFE?0:++LedCnt);
    Dly_ms(1000);   //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 
    PORTA_PA0=~PORTA_PA0;
    
    //高电平灯亮用这句,注释掉上面那句   
    //PORTB=LedCnt;
    
    putstr("\nWeb: shop36265907.taobao.com");
    
    fenwei=ReadATD(0) *100/51;//参考电压5V, 500/255    
    gewei=fenwei/100;
    fenwei=fenwei%100;    
    printp("\nAD0:%d.%02dV,",gewei,fenwei);
    
    fenwei=ReadATD(1) *100/51;//参考电压5V, 500/255    
    gewei=fenwei/100;
    fenwei=fenwei%100;    
    printp("\nAD1:%d.%02dV,",gewei,fenwei);
    
    fenwei=ReadATD(2) *100/51;//参考电压5V, 500/255    
    gewei=fenwei/100;
    fenwei=fenwei%100;    
    printp("\nAD2:%d.%02dV,",gewei,fenwei);
    
    fenwei=ReadATD(3) *100/51;//参考电压5V, 500/255    
    gewei=fenwei/100;
    fenwei=fenwei%100;    
    printp("\nAD3:%d.%02dV;",gewei,fenwei);
  }
}