MSP430F149 ADC代码

以下是MSP430F149单片机ADC代码的示例：

#include <msp430f149.h>

void ADC_Init(void)
{
    ADC12CTL0 = ADC12ON + SHT0_2 + REFON + REF2_5V; //开启ADC12，设置采样保持时间，开启内部参考电压和2.5V参考电压
    ADC12CTL1 = SHP + CONSEQ_0 + ADC12DIV_0 + ADC12SSEL_0; //设置采样方式为单通道单次转换，时钟源为ADC12OSC，时钟分频为1
    ADC12MCTL0 = SREF_1 + INCH_0; //设置参考电压为AVCC和AVSS，选择A0通道作为输入
    ADC12IE = 0x01; //开启ADC12中断
    ADC12CTL0 |= ENC; //使能ADC12转换
}

#pragma vector=ADC12_VECTOR
__interrupt void ADC12_ISR(void)
{
    switch(__even_in_range(ADC12IV,34))
    {
        case  0: break;                           // Vector  0:  No interrupt
        case  2: break;                           // Vector  2:  ADC overflow
        case  4: break;                           // Vector  4:  ADC timing overflow
        case  6:                                  // Vector  6:  ADC12IFG0
            if(ADC12MEM0 > 0x7ff)                 //如果采样值大于2047
                P1OUT |= BIT0;                    //点亮LED
            else
                P1OUT &= ~BIT0;                   //熄灭LED
            __bic_SR_register_on_exit(LPM0_bits); //退出低功耗模式
            break;
        case  8: break;                           // Vector  8:  ADC12IFG1
        case 10: break;                           // Vector 10:  ADC12IFG2
        case 12: break;                           // Vector 12:  ADC12IFG3
        case 14: break;                           // Vector 14:  ADC12IFG4
        case 16: break;                           // Vector 16:  ADC12IFG5
        case 18: break;                           // Vector 18:  ADC12IFG6
        case 20: break;                           // Vector 20:  ADC12IFG7
        case 22: break;                           // Vector 22:  ADC12IFG8
        case 24: break;                           // Vector 24:  ADC12IFG9
        case 26: break;                           // Vector 26:  ADC12IFG10
        case 28: break;                           // Vector 28:  ADC12IFG11
        case 30: break;                           // Vector 30:  ADC12IFG12
        case 32: break;                           // Vector 32:  ADC12IFG13
        case 34: break;                           // Vector 34:  ADC12IFG14
        default: break;
    }
}

int main(void)
{
    WDTCTL = WDTPW + WDTHOLD; //停用看门狗定时器
    P1DIR |= BIT0;           //将P1.0设置为输出
    P1OUT &= ~BIT0;          //熄灭LED
    ADC_Init();              //初始化ADC
    while(1)
    {
        __delay_cycles(1000); //延时
        ADC12CTL0 |= ADC12SC; //开始采样
        __bis_SR_register(LPM0_bits + GIE); //进入低功耗模式并开启全局中断
    }
}