پروژه راه اندازی سنسور دما LM35 با استفاده از مجموعه آموزشی AVR WIZARD به زبان C

				
					#include <mega16a.h>
 
#include <delay.h>
 
// Alphanumeric LCD functions
#include <alcd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// Declare your global variables here       
//unsigned  char temp[30];     
char i = 0;
char lm35[10];
float lm35_value = 0.00;
float lm35_av  = 0;
// Voltage Reference: AVCC pin
#define ADC_VREF_TYPE ((0<<REFS1) | (1<<REFS0) | (0<<ADLAR))
 
// Read the AD conversion result
unsigned int read_adc(unsigned char adc_input)
{
 
   // select the corresponding channel 0~7
  // ANDing with ’7' will always keep the value
  // of �ch’ between 0 and 7
  adc_input &= 0b00000111;  // AND operation with 7
  ADMUX = (ADMUX & 0xF8)|adc_input; // clears the bottom 3 bits before ORing
  
  // start single convertion
  // write ’1' to ADSC
  ADCSRA |= (1<<ADSC);
  
  // wait for conversion to complete
  // ADSC becomes ’0' again
  // till then, run loop continuously
  while(ADCSRA & (1<<ADSC));
  
  return (ADCW);
}
 
void main(void)
{
 
// Declare your local variables here
 
// Input/Output Ports initialization
// Port A initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRA=(0<<DDA7) | (0<<DDA6) | (0<<DDA5) | (0<<DDA4) | (0<<DDA3) | (0<<DDA2) | (0<<DDA1) | (0<<DDA0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
| (0<<PORTA1) | (0<<PORTA0);
 
// Port B initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRB=(0<<DDB7) | (0<<DDB6) | (0<<DDB5) | (0<<DDB4) | (0<<DDB3) | (0<<DDB2) | (0<<DDB1) | (0<<DDB0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTB=(0<<PORTB7) | (0<<PORTB6) | (0<<PORTB5) | (0<<PORTB4) | (0<<PORTB3) | (0<<PORTB2) | (0<<PORTB1) | (0<<PORTB0);
 
// Port C initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRC=(0<<DDC7) | (0<<DDC6) | (0<<DDC5) | (0<<DDC4) | (0<<DDC3) | (0<<DDC2) | (0<<DDC1) | (0<<DDC0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTC=(0<<PORTC7) | (0<<PORTC6) | (0<<PORTC5) | (0<<PORTC4) | (0<<PORTC3) | (0<<PORTC2) | (0<<PORTC1) | (0<<PORTC0);
 
// Port D initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRD=(0<<DDD7) | (0<<DDD6) | (0<<DDD5) | (0<<DDD4) | (0<<DDD3) | (0<<DDD2) | (0<<DDD1) | (0<<DDD0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTD=(0<<PORTD7) | (0<<PORTD6) | (0<<PORTD5) | (0<<PORTD4) | (0<<PORTD3) | (0<<PORTD2) | (0<<PORTD1) | (0<<PORTD0);
 
// ADC initialization
// ADC Clock frequency: 125.000 kHz
// ADC Voltage Reference: AVCC pin
// ADC Auto Trigger Source: ADC Stopped
ADMUX=ADC_VREF_TYPE;
ADCSRA=(1<<ADEN) | (0<<ADSC) | (0<<ADATE) | (0<<ADIF) | (0<<ADIE) | (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
SFIOR=(0<<ADTS2) | (0<<ADTS1) | (0<<ADTS0);
// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTB Bit 0
// RD - PORTB Bit 1
// EN - PORTB Bit 2
// D4 - PORTA Bit 4
// D5 - PORTA Bit 5
// D6 - PORTA Bit 6
// D7 - PORTA Bit 7
// Characters/line: 16
lcd_init(16);
// Global enable interrupts
#asm("sei")
 lcd_clear();
 lcd_putsf("   HI Welcome");   
 
while (1)
      {  
 
               for (i = 0 ; i<100;i++)                    //we want to sampelling 100 times
               {    
               lm35_value = read_adc(1);   
               lm35_av +=  lm35_value; 
               delay_ms(20);  
               }   
               lm35_av =lm35_av/100;                //average of 100 sample 
               lm35_value=lm35_value / 2.083;   //now we change to cantigerad
               ftoa(lm35_value,0,lm35);    
                lcd_gotoxy( 0 ,1); 
                lcd_putsf("LM35:"); 
                lcd_gotoxy(9 ,1);             
                lcd_puts(lm35);      
                lcd_gotoxy(12,1); 
                lcd_putsf("C");   
                delay_ms(5000); 
              
          }
 
 
}