MSP430G2553 launchpad 口袋板 口袋实验平台 电压表 检测P1.4引脚电压显示到屏幕上 ADC

初始化ADC

    ADC10CTL0 = ADC10SHT_2 + ADC10ON + ADC10IE; // ADC10ON, interrupt enabled
    ADC10CTL1 = INCH_4;                       // input A4  1.4
    ADC10AE0 |= BIT4;                         // PA.4 ADC option select

开始转换和读取

 ADC10CTL0 |= ENC + ADC10SC;             // Sampling and conversion start
adtest = (float) ADC10MEM / 1024.0 * 3.3;