adc12.h

基于msp430的一个系统运用系统函数kernel

#define num  32

unsigned long int K0,K1,K2,K3,WetO,WetI,LightO,LightI;

static uint A0results[num];
static uint A1results[num];
static uint A2results[num];
static uint A3results[num];

void start()
{
  WDTCTL=WDTPW+WDTHOLD;
  P6SEL = 0x0f;
  ADC12CTL0=ADC12ON+SHT0_8+MSC;
  ADC12CTL1=SHP+CONSEQ_3;
  ADC12MCTL0=INCH_0;
  ADC12MCTL1=INCH_1;
  ADC12MCTL2=INCH_2;
  ADC12MCTL3=INCH_3+EOS;
  ADC12IE =0x08;
  ADC12CTL0 |= ENC;
  _EINT();
  
  while(1)
  {
     ADC12CTL0 |=ADC12SC;
  }
  
}

#pragma vector=ADC12_VECTOR
__interrupt void ADC12ISR(void)
{
  static uchar indx=0;
  
   A0results[indx++]=ADC12MEM0;
  A1results[indx]=ADC12MEM1;
  A2results[indx]=ADC12MEM2;
  A3results[indx]=ADC12MEM3;
  
   if(indx==num)
   {
        uchar i;
        unsigned long A0sum=0,A1sum=0,A2sum=0,A3sum=0;
        indx=0;
        
        for(i=0;i<num;i++)
        {
            A0sum+=A0results[i];
            A1sum+=A1results[i];
            A2sum+=A2results[i];
            A3sum+=A3results[i];
            
        }
        
        A0sum>>=5;
        A1sum>>=5;
        A2sum>>=5;
        A3sum>>=5;
        
        K0=(int)A0sum;
        K1=(int)A1sum;
        K2=(int)A2sum;
        K3=(int)A3sum;
        
        WetI=K0*100/4095;
        WetO=K1*100/4095;
        LightI=K2*64/4095;
        LightO=K3*64/4095;
   }
   
} 
        
     
void close()
{
  ADC12CTL0 &=~ADC12SC;   
}