msp430ADC程序

上图是ADC的内部工作原理图，通过这个图，我们可以知道430有16个转化通道，16个转化结果寄存器和16个控制寄存器

其中ADC12MEMX与ADC12MCTLX是一一对应的，但是要注意的一点是通道Ax并不与ADC12MEMX相对应，也就是说A1的转化结果不一定非得放到ADC12MEM1当中，

ADC12MCTLX中的INCHx可以确定ADC12MEMX存放哪个通道的转化结果。

下面附一个单通道单次转化的程序：

#include  <msp430x14x.h>#include"lcd.h"void int2charsLcdshow(int value);void DelayXms(unsigned int i);  //delay about x ms   void main(void){  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT // LcdReset();  //LCD1602³õʼ»¯  ADC12CTL0 = SHT0_2 + ADC12ON;             // ÉèÖòÉÑù±£³ÖµÄʱ¼äΪ8¸ö£¨4n¸ö£©Ê±ÖÓÖÜÆÚ£¬´ò¿ªADC12  ADC12CTL1 = SHP;                          // ʹÓòÉÑù¶¨Ê±Æ÷¾ö¶¨²ÉÑùʱ¼ä  ADC12IE = 0x01;                           //   ADC12CTL0 |= ENC;                         // ADת»¯Ê¹ÄÜ  P6SEL |= BIT0;                            // P6.0 ×÷ΪADת»¯µÄA0  P2DIR |= BIT0;                            // P1.0 output    for (;;)  {    DelayXms(500);    ADC12CTL0 |= ADC12SC;                   // ¿ªÊ¼×ª»¯    _BIS_SR(CPUOFF + GIE);                  // LPM0, ADC12_ISR will force exit  }}// ADC12 interrupt service routine#pragma vector=ADC_VECTOR__interrupt void ADC12_ISR (void){  // int2charsLcdshow(ADC12MEM0);    if (ADC12MEM0 < 0x7FF)                   //×î´óÖµÊÇ0xFFF£¬ÔòËüµÄÒ»°ë¾ÍÊÇ0x7FF      P2OUT &= ~0x01;                       // Clear P1.0 LED off    else      P2OUT |= 0x01;                        // Set P1.0 LED on    _BIC_SR_IRQ(CPUOFF);                    // Clear CPUOFF bit from 0(SR)}void int2charsLcdshow(int value){   int bits=0,ten = 0,hundred = 0,thousand = 0;   //ÕâËÄλ·Ö±ð´æ´¢¸ö¡¢Ê®¡¢°Ù¡¢Ç§Î»¡£   thousand = value/1000;   hundred  = value%1000/100;   ten = value%100/10;   bits = value%10;   Disp1Char(0,0,thousand+'0');   Disp1Char(1,0,hundred+'0');   Disp1Char(2,0,ten+'0');   Disp1Char(3,0,bits+'0');}void DelayXms(unsigned int i){    unsigned int j;    for( ; i>0; i--){      for(j=0;j<200;j++);     }  }