Extreme point test

心在流浪

Extreme point test [Copy link]

Below is my program. The test program can enter interruption, but no data can be collected. Can you help me find the problem?

#include

#define n 36

int ADC_buf[n];

unsigned char j;

unsigned char i=0;

int  g_zhong,ADC_MAX;

float  MAX_true;

void init_TimerA(void)

{

  TA0CTL|=TASSEL_2+TACLR;//选择时钟为SMCLK,清除TAR

  TA0CCTL0|=CCIE;;//CCR0使能中断

  //TA0CCR0=40000;//频率为200Hz 8M/40000=200

  TA0CCR0=20000;//频率为40kHz 8M/200=40k

  TA0CTL|=MC0;//增计数模式

}

void init_ADC(void)

{

  ADC12CTL0&=~ADC12ENC;//允许转换位是零，不允许转换

  ADC12CTL1|=ADC12CSTARTADD_0;//多次转换的地址是ADC12MEM0

  ADC12MCTL0|=ADC12INCH_0;//模拟输入通道为A0

  ADC12CTL0|=ADC12SHT0_8 + ADC12ON;//ADC12ON:ADC12模块转换控制位，为一时打开该模块允许转换，

  ADC12CTL1|=ADC12CONSEQ_2;//单通道多次转换模式

  ADC12CTL1|=ADC12SSEL_2;//ADC12时钟源选择SMCLK

  ADC12CTL1|=ADC12DIV_0;//分频因子是1

  ADC12CTL1|=ADC12SHP;//Sampling signal source comes from timer

ADC12CTL1|=ADC12SHS_1;//Clock source selectionTA

ADC12CTL0|=ADC12ENC;//ENC: Conversion enable bit is temporarily allowed to be converted,

}

int main(void)

{

WDTCTL = WDTPW + WDTHOLD; // Stop WDT[/fontsize][/fontsize] ]

init_TimerA(); //Clock initialization

init_ADC();

P6SEL |= 0x01; // P6.0 ADC option select

P1DIR |= 0x01;

P1OUT &=~BIT0;[/ align]

P6DIR |= BIT1;

P6OUT |= BIT1;

_EINT();

while (1)

{ ADC_buf=ADC12MEM0;//读取转换结果

       i++;

       i=i%n;

     if(i==0)

     {

      for(j=1;j" color][="" color][color="#7F0055]if(ADC_buf[j-1]" font][="" size][="" {[="">ADC_buf[j])

    {

      g_zhong=ADC_buf[j-1];

      ADC_buf[j-1]=ADC_buf[j];

      ADC_buf[j]=g_zhong;

      }

        ADC_MAX=ADC_buf[n-1];

         }

       MAX_true=ADC_MAX*3.30/4095;

     }

  }

}

#pragmavector=TIMER0_A0_VECTOR

__interrupt void Timer_A(void)

{

     P6OUT^= BIT1;

     ADC12CTL0|= ADC12ENC+ADC12SC;

     _bic_SR_register(LPM0_bits);

}

freebsder

ADC_MAX = 0 ？

huo_hu

Because you didn't get the conversion result in your interrupt.

心在流浪

Can't read the result in the interrupt