20222-4-8-MSP430F5529单片机ADC测试代码

adc01.c

#include <msp430.h>

unsigned int voltage[4];

int main(void) {
  WDTCTL = WDTPW + WDTHOLD; // Stop WDT
  P6SEL = BIT1;             // P6.1 ADC option select
  //  P1DIR |= BIT0;                            // P1.0 output
  ADC12CTL0 = ADC12SHT02 + ADC12ON; // Sampling time, ADC12 on
  ADC12CTL1 = ADC12SHP;             // Use sampling timer
  //  ADC12IE = ADC12IE1;                           // Enable interrupt p6.1
  ADC12MCTL0 = ADC12INCH_1; // A1 as adc input channel p6.0
  //  ADC12MCTL1 = ADC12INCH_1; //A1 as adc input channel p6.1
  ADC12CTL0 |= ADC12ENC;

  int i;
  volatile unsigned long tmp;
  while (1) {
    tmp = 0;
    for (i = 0; i < 4; i++) {
      ADC12CTL0 |= ADC12SC; // Start sampling/conversion
      voltage[i] = ADC12MEM0;
      tmp += voltage[i];
    }
    tmp = tmp >> 2;
    //    while(!(ADC12IFG & BIT1 ));
    //    __bis_SR_register(LPM0_bits + GIE);     // LPM0, ADC12_ISR will force
    //    exit
    __no_operation(); // For debugger
  }
}