[求助] MSP430疑似进不去中断，观测不到输出

GeorgeDong 2019-4-14 11:25 楼主

我想做一个通过MSP430F169片上ADC采样，并通过片上DAC输出的程序，参考了一些书，但是现在情况是DAC可以正常输出，但ADC那里无法确定是没有采集到信号，还是没有进入中断把程序输出出去。代码如下：
#include  "io430.h"
#include  "dac12.h"

typedef unsigned char uchar;
typedef unsigned int  uint;
//typedef unsigned int  result0;

#define Num_of_Results 15

static uint results[Num_of_Results]; //保存ADC转换结果的数组
void ADC_Init(void);

/************************主函数****************************/
void main(void)
{
  WDTCTL = WDTPW+WDTHOLD;                //关闭看门狗
/*下面六行程序关闭所有的IO口*/
  P1DIR = 0XFF;P1OUT = 0XFF;
  P2DIR = 0XFF;P2OUT = 0XFF;
  P3DIR = 0XFF;P3OUT = 0XFF;
  P4DIR = 0XFF;P4OUT = 0XFF;
  P5DIR = 0XFF;P5OUT = 0XFF;
  P6DIR = 0XFF;P6OUT = 0X00;
  ADC_Init();
  InitDac12();
  GoDac12(100,0); //打开DAC12通道0
  GoDac12(100,1); //打开DAC12通道1
  Dac12Write(0xFFF,1);
  //Dac12Write(0x0FF,0);
while (1)
  {
ADC12CTL0 |= ADC12SC;                // Start sampling/conversion
ADC12CTL0 |= ENC;
__bis_SR_register(LPM0_bits + GIE);    // LPM0, ADC12_ISR will force exit
__no_operation();                      // For debugger
  }
}

#pragma vector=ADC_VECTOR
__interrupt void ADC12ISR (void)
{
  static uint index = 0;

  results[index++] = ADC12MEM0;             // Move results
  if(index == Num_of_Results)
  {
      uchar i;
      unsigned long sum = 0;

      index = 0;
      for(i = 0; i < Num_of_Results; i++)
      {
         sum += results[i];
      }
      sum =sum/Num_of_Results;                         //除以15

      Dac12Write(sum,0);
  }
  __bic_SR_register_on_exit(LPM0_bits);
}

/*******************************************
函数名称：ADC_Init
********************************************/
void ADC_Init(void)
{
  ADC12CTL0 &= ~ENC;
  P6SEL |= 0x01;
  ADC12CTL0 = ADC12ON+SHT0_4+MSC+REFON+REF2_5V;
  ADC12CTL1 = SHP+CONSEQ_2;
  ADC12MCTL0 = INCH_0;
  ADC12IE = 0x01;
}

/*******************************配置DAC********************/
#include "io430.h"
#include "dac12.h"

void InitDac12()
{

//ADC12CTL0 = REF2_5V + REFON; //打开内部参考电压源，参考电压为2.5V
//设置DAC12通道0
//满量程为参考电压，中速度/电流输出，12位分辨率，Vref为参考电压，立即刷新输出
DAC12_0CTL = DAC12IR + DAC12AMP_5 + DAC12ENC + DAC12LSEL_1;
DAC12_0CTL |= DAC12CALON; //自动校准DA输出
//设置DAC12通道1
//满量程为参考电压的3倍，中速度/电流输出，12位分辨率，Vref为参考电压，立即刷新输出
DAC12_1CTL = DAC12IR + DAC12AMP_5 + DAC12ENC +DAC12LSEL_1;
DAC12_1CTL |= DAC12CALON; //自动校准DA输出
//等待校准结束
while(DAC12_0CTL & DAC12CALON == DAC12CALON);
while(DAC12_1CTL & DAC12CALON == DAC12CALON);
}

/**********************************************
打开或关闭DAC12
doit：0--关闭；  100：运行
which：打开或关闭。 0--DAC0；  1--DAC1；
**********************************************/
void GoDac12(unsigned char doit, unsigned char which)
{
if(doit == 0) //关闭DAC12
{
      if(which == 0)
         DAC12_0CTL &= ~DAC12ENC;
      else
         DAC12_1CTL &= ~DAC12ENC;
}
else if(doit == 100) //打开DAC12
{
      if(which == 0)
         DAC12_0CTL |= DAC12ENC;
      else
         DAC12_1CTL |= DAC12ENC;
}
}

/**********************************************
写输出值
dat：要输出的值，准备写入DA数据寄存器
which：写入哪个通道。 0--DAC0；  1--DAC1；
**********************************************/
void Dac12Write(unsigned int dat, unsigned char which)
{
if(which == 0)
      DAC12_0DAT = dat;
else
      DAC12_1DAT = dat;
}