msp430示例程序

/*adc for msp430fxxx 例1*/

#include

int main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
ADC12CTL0 = SHT0_2 + ADC12ON; // Set sampling time, turn on ADC12
ADC12CTL1 = SHP; // Use sampling timer
ADC12IE = 0x01; // Enable interrupt
ADC12CTL0 |=ENC; // Conversion enabled
P6DIR &= ~0x01; // P6.0, i/p
P6SEL |= 0x01; // P6.0-ADC option select
P1DIR |= 0x01; // P1.0 output-LED

for (;;)
{
ADC12CTL0 |= ADC12SC; // Start convn, software controlled
_BIS_SR(CPUOFF + GIE); // LPM0, ADC12_ISR will force exit
}

}

#pragma vector=ADC12_VECTOR
__interrupt void ADC12_ISR (void)
{
if (ADC12MEM0 < 0x7FF)
P1OUT &= ~0x01; // Clear P1.0 LED off
else
P1OUT |= 0x01; // Set P1.0 LED on
_BIC_SR_IRQ(CPUOFF); // Clear CPUOFF bit from 0(SR)
}