radar oven00.c

用msp430做的一个超声波雷达测距的源程序

#define MAIN_INCLUDE
//#define HT1621

//#define DEBUG_WriteDumy
//#define DEBUG_232

#include "radar oven00.h"

void main(void)
{
  unsigned short timedata,td,lendata,basicwidth,tempdata;  
  unsigned char i,j,disp,fg,txtime,txfg,zerofg,shortflag,counter;
  unsigned short basicwidths[5];
  signed short tempp;
  Flag_comm.timerBint_flag=0;
  Flag_comm.Lowbatt_flag=0;

  WDTCTL = WDTPW + WDTHOLD;             // Stop WDT
  BCSCTL1 &= ~XT2OFF;                       // ACLK = LFXT1 = HF XTAL
    
  do 
  {
  IFG1 &= ~OFIFG;                       // Clear OSCFault flag
    Delayms(1);
  }
  while ((IFG1 & OFIFG) == OFIFG);      // OSCFault flag still set?                

  BCSCTL2 |= SELM1+SELS;               // MCLK & SMCLK = LFXT2 (safe)
    
  P1SEL =  0;
  P2DIR &= ~BIT1;  
  P2OUT &= ~BIT1;
  P1DIR |= BIT3+BIT4+BIT2;  
  P1OUT &= ~(BIT3+BIT4+BIT2);

  ME1 |= UTXE0;                         // Enable USART0 TXD/RXD
  //IE1 |= URXIE0;                      // Enable USART0 RX interrupt
  P3SEL |= 0x30;                        // P3.4,5 = USART0 TXD/RXD
  P3DIR |= 0x10;                        // P3.4 output direction

  intialization_ht1621();
  ht1621_ramdump(0xff); 
   for(i=10;i>0;i--)
   {
      Delayms(500);
      P1OUT ^= BIT3+BIT4+BIT2;  
   }

  ht1621_ramdump(0); 
  tempp=-2;
  UCTL0 = CHAR;                         // 8-bit character
  UTCTL0 = SSEL1;                      // UCLK = SMCLK 8000000
  UBR00 = 34;                         // 4000000/115200
  UBR10 = 0;                         //
  UMCTL0 = 0xbb;                        //  modulation
  
  TBCCR0 =32768/10-1;                     // 1 hz interrupt
  TBCTL |=TBSSEL0 + TBCLR + TBIE + MC0;
  
  TACTL |=TASSEL1 + TACLR + ID1 + ID0;
  TACCR0 =65535;
  disp=0;
  basicwidth=0;
  txtime=6;
  shortflag=0;
  counter=0;
  basicwidths[0]=0;
  basicwidths[1]=0;
  basicwidths[2]=0;
  basicwidths[3]=0;
  basicwidths[4]=0;
  tempp=abs(tempp);
  ht1621_ramdump(tempp); 
  _EINT();                             // Enable interrupts  

  for (;;)                             
  {
    if(Flag_comm.timerBint_flag==1)
    {
        Flag_comm.timerBint_flag=0;
        //P1OUT |= BIT7;
        TACTL |= MC0+TACLR;
        P2DIR |= BIT1;  
        Delayms(4);
        P2DIR &= ~BIT1;
        //P1OUT &= ~BIT7;          
        
        Delayms(1);
        
        //timedata=TAR;
        //ht1621_displayInt(1,timedata);   
        fg=0;
        td=0;
        timedata=0;
        while(1)
        { 
          zerofg=0;
          if((P2IN & BIT1)==BIT1 && fg==0)   
          {
              fg=1;
              basicwidth=TAR-400;
          }

          //lendata=0;
          if((P2IN & BIT1)==0 && fg==1 && shortflag==0)
          {
                td=TAR;
                for (j=20;j>0;j--);
                if((P2IN & BIT1)==0)
                {
                    TACTL &= ~MC0;
                    timedata=td;
                    //lendata=(unsigned short)(((unsigned long)timedata*346)/20000);
                    zerofg=1;
                    break;
                }  
          }    
                  
          if(TAR>27000)
          {
              TACTL &= ~MC0;
              if(timedata==0)
              timedata=0xffff;
              break;
          }
        }
        
        TACTL &= ~MC0;

        Timedistance+=timedata;
        
        basicwidths[counter]=basicwidth;
        if(++counter>4)
        {
          counter=0;
          tempdata=0;
          basicwidth=(basicwidths[0]+basicwidths[1]+basicwidths[2]+basicwidths[3]+basicwidths[4])/5;
          for(i=0;i<5;i++)
          {
            if(basicwidth>basicwidths[i])
              tempdata+=basicwidth-basicwidths[i];
            else  
              tempdata+=basicwidths[i]-basicwidth;
          }  
          tempdata=tempdata*100/basicwidth;
          
          if(tempdata>15)basicwidth=2000;
          
          basicwidths[0]=0;
          basicwidths[1]=0;
          basicwidths[2]=0;
          basicwidths[3]=0;
          basicwidths[4]=0;
          Timedistance/=5;
          
          if(basicwidth>1200)lendata=0;
          else
          lendata=(unsigned short)(((unsigned long)Timedistance*346)/20000);
          
          if(lendata>40)P1OUT &= ~BIT2;
          else P1OUT |= BIT2;
          if(lendata>50)P1OUT &= ~BIT3;
          else P1OUT |= BIT3;
          if(lendata>60)P1OUT &= ~BIT4;
          else P1OUT |= BIT4;
        
          ht1621_displayChar(1,lendata);            
          ht1621_displayChar(4,basicwidth/10);            
           
          Timedistance=0;
          if(Flag_comm.timerBint_flag==1)
          Flag_comm.timerBint_flag=0;
         }

      }
    
    while ((IFG1 & UTXIFG0) == 0);        // USART0 TX buffer ready?         
    _NOP();                             // Required only for C-spy
    
  }
  
}


void Delayms(unsigned short n)
{
    register unsigned short j;
    for(;n>0;n--)
    {
      for (j=130;j>0;j--)
      {
      }
    }
}