#include<io.h> #include<delay.h> int AD_volt=0; int position=0,BJT[4]={0xFE,0xFD
ID: 3902632 • Letter: #
Question
#include<io.h>
#include<delay.h>
int AD_volt=0;
int position=0,BJT[4]={0xFE,0xFD,0xFB,0xF7};
int number=0,segment[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};
int msec=0, sec=0, min=0;
void delay(int i) //time delay function
{
while(i--);
}
void main()
{
ADMUX=0x00;
ADCSRA=0x87;
delay_ms(5);
DDRE=0x03;
DDRC=0xFF; //LED control
PORTC=0xFF; //
DDRD=0x00; //
DDRG=0xFF; //setting speaker a
DDRA=0xFF;
PORTA=0XFF;
DDRB=0xFF;
PORTB=0xFF;
DDRD=0x00;
TCCR0=0x04;
TIMSK=0x01;
SREG=0x80;
while(1){
PORTE=0x01;
delay_ms(5000);
PORTE=0x00;
delay_ms(5000);
PORTE=0x02;
delay_ms(5000);
PORTE=0x00;
delay_ms(5000);}
}
interrupt[TIM0_OVF]void timer0_ovf_isr()
{
TCNT0=0x06;
if(PIND==0xFC)
{
AD_volt=(ADCL)+(ADCH<<8); //
ADCSRA=0xC7;
PORTC=(AD_volt>>2);
PORTA=BJT[position]; //this time clock source
if(position==0)number=sec%10;
if(position==1)number=sec/10;
if(position==2)number=min%10;
if(position==3)number=min/10;
PORTB=segment[number];
position++;
if(position>3)position=0;
msec++;
if(msec==1000)
{
msec=0;
sec++;
}
if(sec==60)
{
sec=0;
min++;
}
if(min==60)min=0;
}
//there 8 switch if i press switch 7 then led light on and speaker is on (do)
if (PIND==(0x7F))
{PORTC=0x7F;
PORTG=0x00;
delay(3906*0.5); //Do (sound scale of C is 3906)
PORTG=0x01;
delay(3906*0.5);
}
if (PIND==0xBF)
{
PORTC=0xBF;
PORTG=0x00;
delay(3906*0.5333);
PORTG=0x01;
delay(3906*0.5333);
}
if (PIND==0xDF)
{
PORTC=0xDF;
PORTG=0x00;
delay(3906*0.6);
PORTG=0x01;
delay(3906*0.6);
}
if (PIND==0xEF)
{
PORTC=0xEF;
PORTG=0x00;
delay(3906*0.6666);
PORTG=0x01;
delay(3906*0.6666);
}
if (PIND==0xF7)
{
PORTC=0xF7;
PORTG=0x00;
delay(3906*0.75);
PORTG=0x01;
delay(3906*0.75);
}
if (PIND==0xFB)
{
PORTC=0xFB;
PORTG=0x00;
delay(3906*0.8);
PORTG=0x01;
delay(3906*0.8);
}
if (PIND==0xFD)
{
PORTC=0xFD;
PORTG=0x00;
delay(3906*0.8888);
PORTG=0x01;
delay(3906*0.8888);
}
if (PIND==0xFE)
{
PORTC=0xFE;
PORTG=0x00;
delay(3906);
PORTG=0x01;
delay(3906);
}
}
Explanation / Answer
Sol: Try this. It should work.
#include<io.h>
#include<delay.h>
int AD_volt=0;
int position=0,BJT[4]={0xFE,0xFD,0xFB,0xF7};
int number=0,segment[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};
int msec=0, sec=0, min=0;
void delay(int i) //time delay function
{
while(i--);
}
void main()
{
ADMUX=0x00;
ADCSRA=0x87;
delay_ms(5);
DDRE=0x03;
DDRC=0xFF; //LED control
PORTC=0xFF; //
DDRD=0x00; //
DDRG=0xFF; //setting speaker a
DDRA=0xFF;
PORTA=0XFF;
DDRB=0xFF;
PORTB=0xFF;
DDRD=0x00;
TCCR0=0x04;
TIMSK=0x01;
SREG=0x80;
while(1){
PORTE=0x01;
delay_ms(5000);
PORTE=0x00;
delay_ms(5000);
PORTE=0x02;
delay_ms(5000);
PORTE=0x00;
delay_ms(5000);}
}
interrupt[TIM0_OVF]void timer0_ovf_isr()
{
TCNT0=0x06;
if(PIND==0xFC)
{
AD_volt=(ADCL)+(ADCH<<8); //
ADCSRA=0xC7;
PORTC=(AD_volt>>2);
PORTA=BJT[position]; //this time clock source
if(position==0)number=sec%10;
if(position==1)number=sec/10;
if(position==2)number=min%10;
if(position==3)number=min/10;
PORTB=segment[number];
position++;
if(position>3)position=0;
msec++;
if(msec==1000)
{
msec=0;
sec++;
}
if(sec==60)
{
sec=0;
min++;
}
if(min==60)min=0;
}
//there 8 switch if i press switch 7 then led light on and speaker is on (do)
if (PIND==(0x7F))
{PORTC=0x7F;
PORTG=0x00;
delay(3906*0.5); //Do (sound scale of C is 3906)
PORTG=0x01;
delay(3906*0.5);
}
if (PIND==0xBF)
{
PORTC=0xBF;
PORTG=0x00;
delay(3906*0.5333);
PORTG=0x01;
delay(3906*0.5333);
}
if (PIND==0xDF)
{
PORTC=0xDF;
PORTG=0x00;
delay(3906*0.6);
PORTG=0x01;
delay(3906*0.6);
}
if (PIND==0xEF)
{
PORTC=0xEF;
PORTG=0x00;
delay(3906*0.6666);
PORTG=0x01;
delay(3906*0.6666);
}
if (PIND==0xF7)
{
PORTC=0xF7;
PORTG=0x00;
delay(3906*0.75);
PORTG=0x01;
delay(3906*0.75);
}
if (PIND==0xFB)
{
PORTC=0xFB;
PORTG=0x00;
delay(3906*0.8);
PORTG=0x01;
delay(3906*0.8);
}
if (PIND==0xFD)
{
PORTC=0xFD;
PORTG=0x00;
delay(3906*0.8888);
PORTG=0x01;
delay(3906*0.8888);
}
if (PIND==0xFE)
{
PORTC=0xFE;
PORTG=0x00;
delay(3906);
PORTG=0x01;
delay(3906);
}
}
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