Setting Validate Copy Format
/***** Project Header *****/
// Project Name: 
// Author: 
// Date: 21/10/2016  14:51
// Code auto-generated by systemdesignerjs
//      from www.techideas.co.nz

/***** Hardware defines *****/
//make sure this matches your oscillator setting 
#define F_CPU 16000000//crystal 

/***** Includes *****/
#include <avr/io.h> 
//#include <stdint.h> 
#include <util/delay.h>  
//#include <avr/interrupt.h>  
//#include <avr/eeprom.h>  
//#include <stdio.h>  
//#include <string.h>  
//#include <avr/pgmspace.h>  

/***** Hardware macros *****/
//Hardware macros for outputs
#define SET_FAN   PORTB |= (1<<PB3) 
#define CLR_FAN   PORTB &= ~(1<<PB3) 
//Hardware macros for inputs
//Hardware macros for ADC inputs
#define TEMPR_SENSOR 1     //macro to refer to ADC channel

/***** User macros *****/

#define READING_INTERVAL 5000 //5 seconds
#define VREF 1.1
#define MAX_ADC 255
#define RATE 100.0
#define MAX_FAN 69
#define MIN_FAN 54

/***** Declare & initialise global variables *****/


/***** Interrupt Service Routines *****/

/***** Prototypes for Functions *****/

uint8_t get_tempr(uint16_t adc_reading);
void control_fan(uint8_t tempr);

/***** Configure ADC *****/
void init_ADC() {
  //At 16MHZ set prescaler to 128 to get 125Khz clock
    ADCSRA |= ((1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0));
  //At 8MHz set prescaler to 64 to get 125Khz clock
    //ADCSRA |= ((1<<ADPS2)|(1<<ADPS1));
  //At 1MHz set prescaler to 8 to get 125Khz clock
    //ADCSRA |= ((1<<ADPS1)|(1<<ADPS0));
  //AVcc as voltage reference with external capacitor on ARef
    ADMUX |= (1<<REFS1);
  //uncomment this line for internal voltage
    ADMUX |= (1 << REFS0);
  ADCSRA |= (1 << ADEN);
  //Power on the ADC
    ADCSRA |= (1 << ADSC);
  //Start initial conversion
}
// get a single adc reading from one channel
uint16_t read_adc(uint8_t channel) {
  ADMUX &= 0xF0;
  //Clear previously read channel
    ADMUX |= channel;
  //Set to new channel to read
    ADCSRA |= (1 << ADSC);
  //Starts a new conversion
    while (ADCSRA & (1 << ADSC));
  //Wait until the conversion is done
    return ADCW;
  //Returns the value from the channel
}

/***** Main function *****/
int main(void) {
  /***** Initial hardware setups go here *****/
  init_ADC();
  //setup the ADC to work
    
    /***** IO Hardware Config *****/
    // Initially make all micro pins outputs
    DDRB = 0xff;
  //set as outputs
    DDRC = 0xff;
  //set as outputs
    DDRD = 0xff;
  //set as outputs
    // make these pins inputs
    DDRC &= ~ (1 << PC1);
  
  /***** Main variables go here *****/
  uint8_t tempr = 0;
  uint16_t tempr_sensor_val = 0;
  
  /***** Run once code goes here *****/
  /***** Loop code *****/
  while (1) {
    
    //DO NOT CHANGE THESE LINES OF CODE
      tempr_sensor_val = read_adc(1);
    // TEMPR_SENSOR_ 
      tempr = get_tempr(tempr_sensor_val);
    control_fan(tempr);
    _delay_ms(5000);
    // READING_INTERVAL_ 
  }
  //while end
}
//main end
/***** Functions *****/
uint8_t get_tempr(uint16_t adc_reading) {
  uint16_t read = (1.1 * adc_reading) / (255 / 100.0);
  // RATE_  MAX_ADC_  VREF_ 
    return read;
  // RATE_  MAX_ADC_  VREF_ return ((int)adc_reading*(int)1.1)/((int)255/(int)100.0);
  
  // ADD CODE HERE to convert the adc readng from the LM35 to degrees C
    // you must use only integer math and return an 8 bit unsigned value
    // the variable tempr must return the correct value from 0 to 99 degrees
}

void control_fan(uint8_t tempr) {
  if (tempr > 69) {
    // MAX_FAN_ 
      PORTB |= (1<<PB3);
    // SET_FAN_  SET_FAN_ 
  }
  if (tempr < 54) {
    // MIN_FAN_ 
      PORTB &= ~(1<<PB3);
    // CLR_FAN_ 
  }
  //ADD CODE HERE TO CONTROL THE FAN 
}
Setting Validate Copy Format