#include <avr/io.h>
#define F_CPU 8000000UL
#include <util/delay.h>
#include <avr/interrupt.h>
uint32_t t,pr=0,cnt=0,time1cnt=0;
uint32_t time,time1,time2,time3;

void lcdinit()
{
cmd(0×38);
cmd(0x0C);
cmd(0×01);
_delay_ms(1000);
}

void cmd(unsigned char c)
{
PORTC=c;//??
PORTA=0×20; //rw high?
_delay_ms(1);
PORTA=0×00;
_delay_ms(1);

}

void data(unsigned char c)
{
PORTC=c;//??
PORTA=0XA0; //rs high coz we hav accept data nt comand
_delay_ms(1);
PORTA=0×40;
_delay_ms(1);
cmd(0×06);

}

void string(char p)
{
while(p) data(*p++);
}

uint16_t get_adc(unsigned char ch)
{
ADMUX=0×40|ch;
ADCSRA=0xC5;
while(!ADIF);
_delay_ms(50);
return(ADC);
}

unsigned char keypad()
{
while((PINB & 0b00001111)!=0b00001111);

PORTB=0X7f; _delay_ms(10);
    if (PINB==0B01110111)           {/*data('1');*/     return '1';}
    else if (PINB==0B01111011)      {data('2');     return '2';}
    else if (PINB==0B01111101)      {data('3');     return '3';}
    else if (PINB==0B01111110)      {data('A');     return 'A';}
    PORTB=0XBf; _delay_ms(10);
    if (PINB==0B10110111)           {data('4');     return '4';}
    else if (PINB==0B10111011)      {data('5');     return '5';}
    else if (PINB==0B10111101)      {data('6');     return '6';}
    else if (PINB==0B10111110)      {data('B');     return 'B';}
    PORTB=0XDf; _delay_ms(10);
    if (PINB==0B11010111)           {data('7');     return '7';}
    else if (PINB==0B11011011)      {data('8');     return '8';}
    else if (PINB==0B11011101)      {data('9');     return '9';}
    else if (PINB==0B11011110)      {   return 'C';}
    PORTB=0XEf; _delay_ms(10);
    if (PINB==0B11100111)           {   return '*'; }
    else if (PINB==0B11101011)      {data('0');     return '0';}
    else if (PINB==0B11101101)      {   return '#';}
    else if (PINB==0B11101110)      {               return 'D';}

    return 0;
}

ISR(TIMER1_CAPT_vect)
{

t=ICR1;


    if(cnt==9)
    {
    cli();
    cmd(0X01);_delay_ms(10);
    uint32_t temp1;
    unsigned char temp;
    /*pr=t;*/
    pr=(uint32_t)(pr/9);
    pr=(uint32_t)(60000000/pr);
    pr=(uint32_t)(pr/128);          //rpm
    temp1=pr%1000;

    temp=(unsigned char)temp1;
    data((temp/100)+48);
    temp=(unsigned char)temp%100;
    data((temp/10)+48);
    temp=(unsigned char)temp%10;
    data(temp+48);
    string(" rpm");

    cmd(0xc0);
    pr=(uint32_t)(pr*60);
    pr=(uint32_t)(pr*22);
    pr=(uint32_t)(pr/1000);     //kms per hour

    temp1=pr%1000;

    temp=(unsigned char)temp1;
    data((temp/100)+48);
    temp=(unsigned char)temp%100;
    data((temp/10)+48);
    temp=(unsigned char)temp%10;
    data(temp+48);
    string(" kmph");
    cnt=0;
    pr=0;


    if(temp1<50)
    {
        time=0;
    }
    else if(temp1<170)
    {
        time1=time+pr;
        if (time1>4294967296)
        {
            time1cnt++;
            time1=0;
        }

    }
    else if (temp1>=170)
    {
        cmd(0x88);
        temp=(unsigned char)time1cnt%1000;
        data((temp/100)+48);
        temp=(unsigned char)temp%100;
        data((temp/10)+48);
        temp=(unsigned char)temp%10;
        data(temp+48);

        cmd(0xc9);
        string("a:");
        time1=time1/1000000;
        time1=time1*128;
        time1=time1%1000;

        temp=(unsigned char)time1;
        data((temp/100)+48);
        temp=(unsigned char)temp%100;
        data((temp/10)+48);
        temp=(unsigned char)temp%10;
        data(temp+48);
        data('s');
    }
    sei();
    }
    else
    {
    pr=pr+t;
    cnt++;
    }
TCNT1=0;

}
void delay_ms(uint32_t delay)
{
while(delay)
{
_delay_ms(1);
delay–;
}
}
int main(void)
{
DDRB=0XF0;
PORTB=0X0F;

DDRA=0XF0;
DDRC=0XFF;

DDRD=0B10111111;
PORTD|=0B01000000;
lcdinit();
// string(” VEHICLE TESTER”);
TCNT1H=0×00;
TCNT1L=0×00;
TCCR1B=0X45;
TIMSK|=(1<<5);

unsigned char key,x,y,z;
uint16_t adcval,temp;
int acc,decc;
uint32_t del;
sei();

PORTD&=~0b00010000;
while(1)
{
    key=keypad();
    if(key=='1')
    {
        sei();
        key=0;
        del=100;
        while(del)
        {
            PORTD&=0b11101111;
            PORTD|=0b00100000;
            delay_ms(del);
            PORTD&=0b11011111;
            delay_ms(del);
            del--;
        }
        cli();
        //cmd(0x01);_delay_ms(100);
        //data(acc)
    }
    if (key=='2')
    {
        cmd(0x01);
        adcval=get_adc(0);
        adcval=1023;
        temp=((adcval/1023)*100);
        temp=temp%1000;
        x=(temp/100)+48;
        data(x);
        temp=temp%100;
        y=(temp/10)+48;
        data(y);
        temp=temp%10;
        z=temp+48;
        data(z);
        string(" %");
    }
}
}