有关郭天祥MSP430教程源码-ADC实验程序设计。

#include <msp430x14x.h>

#define Num_of_Results 512
int results[Num_of_Results] = {0};

void ADC_Init(void);

void main(void)
{
WDTCTL = WDTPW | WDTHOLD; // Disable the Watchdog.
ADC_Init(); // Initialize ADC12
ADC12CTL0 |= ENC; // Start conversion
_BIS_SR(LPM0_bits); // Enter LPM0
}

void ADC_Init(void)
{
P1DIR = 0xff; // set port to outputs
P1OUT = 0; // reset port outputs
P6SEL |= 0x01; // select A0 input
ADC12CTL0 = ADC12ON+SHT0_1+REF2_5V+REFON; // Setup ADC12
ADC12CTL1 = SHP+CONSEQ_2+SHS_1; // Timer triggers sampling
ADC12MCTL0 = INCH_0 + SREF_1;
ADC12IE = 0x0001; // Enable ADC12IFG.0

TACCR0 = 1500; // Delay to allow Ref to settle
TACCTL0 |= CCIE; // Compare-mode interrupt.
TACTL = TASSEL_1 | MC_1; // TACLK = ACLK, Up mode.
_BIS_SR(LPM3_bits + GIE); // Wait for delay, Enable interrupts
TACCTL0 &= ~CCIE; // Disable timer

P2SEL |= BIT3; // Set for Timer A1
P2DIR |= 0x08;
TACCR0 = 7; // Init TACCR0 w/ sample prd=CCR0+1
TACCR1 = 4; // Trig for ADC12 sample & convert
TACCTL1 = OUTMOD_3; // Set/reset
TACTL = TACLR | MC_1 | TASSEL_1; // ACLK, clear TAR, up mode
}

// Timer_A0 Interrupt Service Routine
#pragma vector=TIMERA0_VECTOR
__interrupt void ta0_isr(void)
{
TACTL = 0;
LPM3_EXIT; // Exit LPM3 on return
}

// ADC12 Interrupt Service Routine
#pragma vector=ADC_VECTOR
__interrupt void ADC12ISR (void)
{
static unsigned int index = 0;

results[index++] = ADC12MEM0; // Move results

if (index == 512)
{
ADC12CTL0 &= ~ENC; // Stop conversion
index = 0;
P1OUT |= 0x01;
_BIS_SR(LPM3_bits); // Enter LPM3
}
}