Task: By using interrupts, take analogue sensor value at portA and display 0-99 value on portA and 100-199 value on PortB and value greater than 200 on portD.

Potentiometer as Analogue Sensor is attached to AVR Atmega16. Conversion of analogue data to digital data using MUX within the Atmega is shown on Ports.Code for this compiled on Atmega Studio , Code shown below. Tutorial Video for this Task  will uploaded soon;

#include<avr/io.h>
#include<avr/interrupt.h>
unsigned char channel=0;
unsigned char adc_data[3];
int main()
{
SREG|=0b10000000; //enabling Global Interrupt
ADCSRA=0b10001110; //Enabling ADCs and setting Prescalar
//SFIOR&=0b00001111;
ADMUX|=0b01100000; //Vref=AVCC and data is left shift,,Channel 0
DDRB=0xFF; //configuring port B as output
DDRC=0XFF; //configuring port C as output
DDRD=0XFF; //configuring port D as output
ADCSRA|= 0b01000000; //starting conversion
// while loop and ISR
while(1){ PORTB=adc_data[0];
PORTC=adc_data[1];
PORTD=adc_data[2];}
return 0;
}
ISR(ADC_vect)
{   if ((ADCH >= 0x00) & (ADCH <= 0x63)){
adc_data[0]=ADCH;}
if ((ADCH >= 0x64) & (ADCH <= 0xC7)){
adc_data[1]=ADCH;
}
if (ADCH > 0xC7){
adc_data[2]=ADCH;
}
ADCSRA|=0x40; //starting adc conversion
}