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Block diagram ของฝั่งควบคุมอุณหภูมิ

Code Microcontroller (Temperature)

#include
#include
#include

#define NTIMER 4

//loop1:SW reading
//loop2:adc from sensors // feedback
//loop3:7segment
//loop4:stepping motor condition

volatile char TmrEnb[NTIMER] = {1, 1, 1, 1};
volatile char TmrMod[NTIMER] = {1, 1, 1, 1};
volatile int TmrRel[NTIMER] = {100, 50, 4, 150}; //0.5 ms
volatile int TmrCnt[NTIMER] = {100, 50, 4, 150};
volatile char TmrRdy[NTIMER] = {0, 0, 0, 0};
volatile char TmrErr[NTIMER] = {0, 0, 0, 0};

void Hardware_init(void);
void ADC_init(void);
void Timer1_init(void);

int main()
{
unsigned char segment_ndot[10] = {0x00,0x10,0x20,0x30,0x40,0x50,0x60,0x70,0x80,0x90};
//unsigned char step[4] = {0x03,0x18,0xC0,0x81};
unsigned char step[4] = {0x01,0x02,0x40,0x80};
unsigned char ch_adc=0,finish=0x00;
unsigned int temp=0,sumadc=0,avradc=0;
unsigned int adc[3];int nadc1 =0;
unsigned char bcd[3];

float real_temp=0;
float set_temp=0;
float dif_temp=0;
float cmp_temp=0;
int flag = 0x00;
int i=0;int j=0;int s=0;
int z=1;int y=7;int x=5;
int stepenable =0;
float adcback=0;

Hardware_init();
ADC_init();
Timer1_init();

sei();

while(1)
{
  ADMUX = (0<  ADCSRA = (1 << ADEN);
  ADCSRA |= (0 << ADPS2)|(1 << ADPS1)|(1 << ADPS0);

  cli();// disable interrupt
  if(TmrRdy[0] == 1)
  {
   TmrRdy[0] = 0;
   sei();

   if(stepenable==0)
   {
    if(((PINA&0x08)==0x08)&&(flag == 0x00))
    { flag = 0x01; }
    else if(((PINA&0x08)==0x00)&&(flag == 0x01))
    {
     flag = 0x00;
     x++;
     if(x>9)
     { x = 0;y++;
      if(y>9)
      { y=0;z++; }
     }
     else if(set_temp>244)
     { z=1;y=7;x=5; }
    }
    else if(((PINA&0x10)==0x10)&&(flag == 0x00))
    { flag = 0x02; }
    else if(((PINA&0x10)==0x00)&&(flag == 0x02))
    {
     flag = 0x00;
     y++;
     if(y>9)
     { y = 0;z++;if(z>2){z=1;} }
     else if(set_temp>235)
     { z=1;y=7;x=5; }
    }
    else if((PINA&0x20)==0x20)
    {
     stepenable=1;
    }
    else{ }
   }
   else if((PINA&0x80)==0x80)
   {
    stepenable =0;
   }
   else{ }

   set_temp = ((z*100)+(y*10)+x);
    }
  else if(TmrRdy[1] == 1)
  {
   TmrRdy[1]=0;

   sei();

   for(ch_adc=1;ch_adc<3;ch_adc++)
   {

ADMUX = (0< ADCSRA |= (1< while((ADCSRA&0x10)!=0x10);

     adc[ch_adc] = ADCW;
   }

   sumadc = sumadc + adc[1];
   nadc1++;
   if(nadc1==15) { nadc1=0; }
   else{ }

   if(nadc1==0)
   { avradc = sumadc/15;
    sumadc=0;
   }
   else{ }

   if(avradc>=204)
   { real_temp = (float)((float)(0.0609*avradc) - 12.439);
   }
   else
   { real_temp = 0;
   }
  }
  else if(TmrRdy[2] == 1)
  {
   TmrRdy[2] = 0;

   sei();

   temp=(unsigned int)(real_temp*10);

   for(i = 0; i < 3; i++)
   {
    bcd[i] = temp%10;
    temp = temp/10;
   }

   if(j == 0)
   {
    PORTB = 0b00000100|finish;
    PORTB |= segment_ndot[bcd[0]];
    PORTD = 0b00000100;
    PORTD |= segment_ndot[x];
    j++;
   }
   else if(j == 1)
   {
    PORTB = 0b00000010|finish;
    PORTB |= segment_ndot[bcd[1]];
    PORTD = 0b00001010;
    PORTD |= segment_ndot[y];
    j++;
   }
   else if(j == 2)
   {
    PORTB = 0b00000001|finish;
    PORTB |= segment_ndot[bcd[2]];
    PORTD = 0b00000001;
    PORTD |= segment_ndot[z];
    j=0;

   }
   else{}

   PORTC = sbi(PORTC,3);
  }
  else if(TmrRdy[3] == 1)
  {
   TmrRdy[3] = 0;

   sei();

   dif_temp = (float)(real_temp - (float)(set_temp/10));

   if(stepenable==1)
   {
    if((dif_temp>2.5)&&(dif_temp<=12.5))
    { cmp_temp = (float)(dif_temp*22.9376);
    }
    else if((dif_temp<=2.5)&&(dif_temp>0))
    { cmp_temp = 57.344; }
    else if(dif_temp<=0)
    { cmp_temp = 0;
     stepenable =2;
    }
    else if(dif_temp>12.5)
    { cmp_temp = 286.72;
    }
    else{}
   }
   else if(stepenable==0)
   { cmp_temp = 0;
    finish = 0x00;
   }
   else if(stepenable==2)
   {   cmp_temp =0;
    finish = 0x08;
   }

   adcback = adc[2];

   if(cmp_temp-5>adcback)
   { PORTC = step[s]|0x08;
    s++;
    if(s>3)
    { s=0; }
   }
   else if(cmp_temp+5   { PORTC = step[s]|0x08;
    s--;
    if(s<0)
    { s=3; }
   }
   else if((cmp_temp+5>=adcback)&&(cmp_temp-5<=adcback))
   { PORTC = 0x00; }
   else{}
  }
  else
  {
   sei();
  }
}
return 0;
}

void Hardware_init(void)
{
//PORTA is input
//PORTB PORTC PORTD is output
DDRA = 0x00;
DDRB = 0xFF;
DDRC = 0xFF;
DDRD = 0xFF;

//clear PORT
PORTB = 0x00;
PORTC = 0x00;
PORTD = 0x00;
}

void ADC_init(void)
{
ADMUX = (0< ADCSRA = (1 << ADEN);
ADCSRA |= (0 << ADPS2)|(1 << ADPS1)|(1 << ADPS0);
}

void Timer1_init(void)
{
//Mode : CTC
//TOP : OCR1A
TCCR1A = (0 << WGM11)|(0 << WGM10);
TCCR1B = (0 << WGM13)|(1 << WGM12);

//prescaler 8 010 001 = no prescaler
TCCR1B |= (0 << CS12)|(1 << CS11)|(0 << CS10);

//8 MHz / 8 = 1 MHz
//output compare interrupt is interval every 1 ms
//1 MHz /500 = 2kHz ==>> 0.5ms /// 1000= 0x03E8 (in hex)
OCR1AH = 0x01;
OCR1AL = 0xF4;

//Timer/Counter1 Output Compare A Match Interrupt Enable
TIMSK = (1 << OCIE1A);
}

ISR (TIMER1_COMPA_vect)
{
int k;
for(k=0; k {
  if(TmrEnb[k] == 1)
        {
   TmrCnt[k]--;
   if(TmrCnt[k] == 0)
   {
    if(TmrRdy[k] == 1)
    {
     TmrErr[k] = 0;
    }
    else
    {
     TmrRdy[k] = 1;
     TmrCnt[k] = TmrRel[k];
     if(TmrMod[k] == 0)
     {
      TmrEnb[k]=0;
     }
    }
   }
  }
}
}

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