main.c

MSP430 的AD转换

#include "msp430x22x4.h"
//#define Num 64
static float result[32];
static int i=0;

void main(void)
{
  
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
  P2SEL|=0x01;//设置P2.0为模拟通道A0
  ADC10CTL0&=~(ENC);//修改ADC寄存器的值
  
  ADC10CTL1|=INCH_0+ADC10SSEL_3+CONSEQ_0 ;//选择A0输入通道，时钟源为MCLK，单通道单次转换
  ADC10CTL0|=SREF_0 +ADC10ON+MSC;//vcc参考源，转换模块开启
    
  ADC10AE0|=0x01;//通道A0允许
  ADC10CTL0|=ENC;//使能转换
  
  
   TACTL|=TASSEL_2 +TACLR ;
   TACCTL0|=CCIE;
   TACCR0=40000;
  
   TACTL|=MC_1;
   _EINT(); 
   while(1);  
}

// Timer_A interrupt service routine
#pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A(void)
{
  ADC10CTL0&=~ENC;
  result[i]=(float)( ADC10MEM)*3/1023;
  i++;
  if(i==32)
  {
   while(1);
  }
 ADC10CTL0|=ENC+ADC10SC; 
}