MSP430G2553 ADC10四通道四次采樣

#include <msp430g2553.h>
unsigned int adc_temp[16];
unsigned int adc[4];
void init_adc()
{
    ADC10CTL0 &= ~ENC;
    ADC10CTL1 = CONSEQ_3 + INCH_3;
    ADC10CTL0 = ADC10SHT_3 + MSC + ADC10ON + ADC10IE;
    ADC10DTC1 = 0x10;
    ADC10AE0 |= BIT0+BIT1+BIT2+BIT3;
}
void main()
{
    char i;
    WDTCTL = WDTPW + WDTHOLD;
    init_adc();
    while(1)
    {
        ADC10CTL0 &= ~ENC;
        while (ADC10CTL1 & BUSY);
        ADC10SA = (unsigned int)adc_temp;
        ADC10CTL0 |= ENC + ADC10SC;
        __bis_SR_register(LPM0_bits + GIE);
        for(i=0;i<4;i++)
        adc[i]=(adc_temp[i]+adc_temp[i+4]+adc_temp[i+8]+adc_temp[i+12])>>2;
    }
}
#pragma vector=ADC10_VECTOR
__interrupt void adc_isr()
{
    __bic_SR_register_on_exit(LPM0_bits);
}