adc.c

msp430的基本程序代码

#include <msp430x16x.h>
static unsigned int results;

void main(void)
{
  WDTCTL = WDTPW+WDTHOLD;                   // Stop watchdog timer
  P6SEL = 0x10;                             // Enable A/D channel inputs
  ADC12CTL0 = ADC12ON+MSC+SHT0_2;           // Turn on ADC12, set sampling time
  ADC12CTL1 = SHP+CONSEQ_1;                 // Use sampling timer, single sequ
  ADC12MCTL0 = INCH_4;                      // ref+=AVcc, channel = A0
 
  ADC12IE = 0x10;                          // Enable ADC12IFG.3
  ADC12CTL0 |= ENC;                         // Enable conversions
  _EINT();                                  // Enable interrupts

  while(1)
  {
    ADC12CTL0 |= ADC12SC;                   // Start conversion
    _BIS_SR(LPM0_bits);                     // Enter LPM0
  }
}

#pragma vector=ADC_VECTOR
__interrupt void ADC12ISR (void)
{
 
  results = ADC12MEM4;                 // Move results, IFG is cleared
  _BIC_SR_IRQ(LPM0_bits);                   // Clear LPM0
  _NOP();                                   // SET BREAKPOINT HERE
}