// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2018-12-06 오후 4:55:04
// by Ok-Hyun Park
atmega128과 avr 트레이닝 키트를 이용해서
온도에 따라(25도를 기준으로)자동으로 선풍기(쿨링팬)가 꺼지고 켜지고 하도록 하고,
온도센서를 이용하여 온도가 7-segment에 표시 되도록 만드려고 합니다.
코드를 짜봤는데 온도가 7-segment에 표시되지 않고,
선풍기가 조건에 상관없이 돌아가기만 합니다.코드 보고 무엇이 문제인지 수정좀 해주세요..
//
#include <avr/io.h>
#include <util/delay.h>
//
#define PERIOD       50
#define DUTY_PERCENT 100
#define PERIOD_1SEC(1000000L/(PERIOD*DUTY_PERCENT))
//
#define X0 0
#define X1 1
#define X2 2
#define X3 3
#define X4 4
#define X5 5
#define X6 6
#define X7 7
//
unsigned int ADC_Temp=0;
unsigned int ADC_average=0;
int ADC_Temperature=250;
//
struct NTC{ int temp; unsigned long res; };
//
const struct NTC NTC10K[]={
  {-50,10240000},{-40,5120000},{-30,110881},{-25,86603},
  {-20,67683},{-19,64519},{-18,61519},{-17,58675},{-16,55976},
  {-15,53416},{-14,50986},{-13,48679},{-12,46488},{-11,44407},
  {-10,42431},{-9,40552},{-8,38766},{-7,37068},{-6,35454},
  {-5,33918},{-4,32456},{-3,31065},{-2,29741},{-1,28480},
  { 0,27280},{ 1,26135},{ 2,25045},{ 3,24006},{ 4,23016},
  { 5,22071},{ 6,21170},{ 7,20311},{ 8,19490},{ 9,18708},
  { 10,17960},{ 11,17247},{ 12,16565},{ 13,15914},{ 14,15291},
  { 15,14697},{ 16,14128},{ 17,13584},{ 18,13064},{ 19,12567},
  { 20,12091},{ 21,11636},{ 22,11200},{ 23,10782},{ 24,10382},
  { 25,10000},{ 26,9633},{ 27,9281},{ 28,8944},{ 29,8621},
  { 30,8312},{ 31,8015},{ 32,7730},{ 33,7456},{ 34,77194},
  { 35,6942},{ 36,6701},{ 37,6468},{ 38,6246},{ 39,6032},
  { 40,5826},{ 41,5628},{ 42,5438},{ 43,5256},{ 44,5080},
  { 45,4911},{ 46,4749},{ 47,4593},{ 48,4443},{ 49,4298},
  { 50,4159},{ 51,4025},{ 52,3896},{ 53,3771},{ 54,3652},
  { 55,3536},{ 56,3425},{ 57,3318},{ 58,3215},{ 59,3115},
  { 60,3019},{ 61,2917},{ 62,2838},{ 63,2752},{ 64,2669},
  { 65,2588},{ 66,2511},{ 67,2436},{ 68,2364},{ 69,2295},
  { 70,2227},{ 71,2162},{ 72,2100},{ 73,2039},{ 74,1980},
  { 75,1924},{ 76,1869},{ 77,1816},{ 78,1765},{ 79,1715},
  { 80,1668},{ 81,1621},{ 82,1576},{ 83,1533},{ 84,1491},
  { 85,1451},{ 86,1411},{ 87,1373},{ 88,1336},{ 89,1301},
  { 90,1266},{ 91,1232},{ 92,1200},{ 93,1168},{ 94,1138},
  { 95,1108},{ 96,1080},{ 97,1052},{ 98,1025},{ 99,999},
  { 100,974},{ 110,758},{ 120,597},{ 130,475}
};
//
unsigned char FND_Buffer[8];
//
unsigned char FND_Font[]={
  0B11111100,
  0B01100000,
  0B11011010,
  0B11110010,
  0B01100110,
  0B10110110,
  0B10111110,
  0B11100100,
  0B11111110,
  0B11110110
};
//------------------------------------------
void FND_Display(void){
  unsigned char i;
  for(i=0; i<8; i++){ PORTE=~(1<<i); PORTB=FND_Buffer[i]; _delay_us(100); }
}
//
void ADC_Read(unsigned char chn){
  ADMUX=(ADMUX&0B11100000)|chn;
  ADCSRA|=(1<<ADSC); while((ADCSRA&0X10)==0);
  ADC_Temp=(int)ADCL+((int)ADCH<<8);
}
//
unsigned int ADC_10Read(unsigned char chn){
  unsigned int cnt=0,average=0;
  for(cnt=0; cnt<10; cnt++){ ADC_Read(chn); average+=ADC_Temp; }
  average/=10;
  return average;
}
//
int ADC_CalTemp(unsigned long ADC_Value){
  static int dis_temp;
  unsigned char i;
  long res,res_div,dif_temp;
  if(ADC_Value<=50)ADC_Value=50;
  else if(ADC_Value>1022)ADC_Value=1023;
  res=(10000*ADC_Value)/(1024-ADC_Value);
  for(i=1; i<(sizeof(NTC10K)/ sizeof(struct NTC)); i++){
    if(NTC10K[i].res<res){
      res_div=(NTC10K[i-1].res-NTC10K[i].res)/ 10;
      dif_temp=(NTC10K[i-1].res-res)/ res_div;
      dis_temp=(NTC10K[i-1].temp)*10+dif_temp;
      return dis_temp;
    }
    else if(NTC10K[i].res==res){
      dis_temp=(NTC10K[i].temp)*10;
      return dis_temp;
    }
  }
  return dis_temp;
}
//
int main(void){
  unsigned char fan=0;
  DDRF=0B11111110;
  DDRE=0B11111111;
  DDRB=0B11111111;
  DDRA=0B11111111;
  ADMUX=(0<<REFS1)|(1<<REFS0);
  ADCSR=(1<<ADEN);
  ADCSR|=0x01;
  while(1){
    ADC_average=ADC_10Read(0);
    PORTA=~(ADC_average>>8);
    PORTC=~(ADC_average&0xFF);
    ADC_Temperature=ADC_CalTemp(ADC_average);
    //
    if(ADC_Temperature>=270){ fan=(0<<X5)|(1<<X4); fan|=(1<<X6); PORTA=fan; } // 25도
    else                    { fan&=~(1<<X6); PORTA=fan; }
    //
    if(ADC_Temperature<0){ ADC_Temperature=-ADC_Temperature; FND_Buffer[0]=0x02; }
    else                 { FND_Buffer[0]=0x00; }
    //
    FND_Buffer[1]=FND_Font[(ADC_Temperature%1000)/100];
    FND_Buffer[2]=FND_Font[(ADC_Temperature%100)/10]|1;
    FND_Buffer[3]=FND_Font[(ADC_Temperature%10)/1];
    FND_Display();
  }
  return 1;
}