void err(unsigned int id, char *str) {
transmit_str(STDERR, str);
_terminate(id);
}
int main( void )
{
system_init();
lcd_init();
uart_init();
timer_init();
DDRA_Bit3=1;
PORTA_Bit3=0;
__enable_interrupt();
write_str(" Traffic counter Nagy Krisztina 2013");
d_1s();
d_1s();
d_1s();
ptr_lcd=0;
write_str("People IN: ");
write_str(" ");
write_str("Total traffic: ");
write_str(" ");
while(1)
{
if(flag1==1)
{
timer1=1000;
flag1=0;
}
if(flag2==1)
{
timer2=1000;
flag2=0;
}
if((timer1>0 && timer2>0) && (timer2 > timer1))
{
people_in++;
people_all++;
flag1=0;
flag2=0;
timer1=0;
timer2=0;
/*write to LCD*/
write_num_on_lcd();
}
if((timer1>0 && timer2>0) && (timer1 > timer2))
{
if(people_in)
{
people_in--;
}
flag1=0;
flag2=0;
timer1=0;
timer2=0;
/*write to LCD*/
write_num_on_lcd();
}
if(flag_button1==1)
{
people_in=0;
write_num_on_lcd();
flag_button1=0;
}
if(flag_button2==1)
{
transmit_str("Number of people in the room:");
transmit_char(lcd[16]);
transmit_char(lcd[17]);
transmit_char(lcd[18]);
transmit_char(lcd[19]);
transmit_char((char)13);
transmit_str("Total traffic:");
transmit_char(lcd[36]);
transmit_char(lcd[37]);
transmit_char(lcd[38]);
transmit_char(lcd[39]);
transmit_char((char)13);
flag_button2=0;
}
}
}
int main(void)
{
DDRB=0x00;
USART_Init(51);
TCCR1B=0x04; // setting falling edge trigger(bit 6) and pre-scaler to 256
long int a,b,c,x,duty,rise,fal,tot;
while(1)
{
TCNT1=0;
// this detects the first falling edge
while(!(TIFR&(1<<ICF1)));
TCCR1B|=0x40; // setting rising edge triggering
TIFR|=(1<<ICF1); // reseting input capture flag
// here we detecting rising edge
while(!(TIFR&(1<<ICF1)));
TIFR|=(1<<ICF1); // reseting input capture flag
TCCR1B&=0x0f; // setting falling edge triggering
a=ICR1; // saving value of ICR1(TCNT1 stored at edge trigger) in variable
// here we detecting falling edge
while(!(TIFR&(1<<ICF1)));
TIFR|=(1<<ICF1); // reseting input capture flag
TCCR1B|=0x40; // setting rising edge triggering
b=ICR1;
// here we detecting rising edge
while(!(TIFR&(1<<ICF1)));
TIFR|=(1<<ICF1); // reseting input capture flag
TCCR1B&=0x0f; // setting falling edge triggering
c=ICR1;
// we are using rising falling rising format with variables as a b c respectively
tot=c-a;
rise=b-a;
fal=c-b;
duty=(rise*100)/tot;
transmit_str("duty rate:");
x=(duty/10)+48;
USART_Transmit(x);
x=(duty%10)+48;
USART_Transmit(x);
USART_Transmit('%');
USART_Transmit(' ');
USART_Transmit(' ');
rise=rise*32000;
transmit_str("Rise time: 0.");
x=(rise/100000000)+48;
USART_Transmit(x);
rise=rise%100000000;
x=(rise/10000000)+48;
USART_Transmit(x);
rise=rise%10000000;
x=(rise/1000000)+48;
USART_Transmit(x);
rise=rise%1000000;
x=(rise/100000)+48;
USART_Transmit(x);
rise=rise%100000;
x=(rise/10000)+48;
USART_Transmit(x);
rise=rise%10000;
x=(rise/1000)+48;
USART_Transmit(x);
rise=rise%1000;
x=(rise/100)+48;
USART_Transmit(x);
rise=rise%100;
x=(rise/10)+48;
USART_Transmit(x);
x=(rise%10)+48;
USART_Transmit(x);
transmit_str("sec");
USART_Transmit(' ');
USART_Transmit(' ');
fal=fal*32000;
transmit_str("Fall time: 0.");
x=(fal/100000000)+48;
USART_Transmit(x);
fal=fal%100000000;
x=(fal/10000000)+48;
USART_Transmit(x);
fal=fal%10000000;
x=(fal/1000000)+48;
USART_Transmit(x);
fal=fal%1000000;
x=(fal/100000)+48;
USART_Transmit(x);
fal=fal%100000;
x=(fal/10000)+48;
USART_Transmit(x);
fal=fal%10000;
x=(fal/1000)+48;
USART_Transmit(x);
fal=fal%1000;
x=(fal/100)+48;
USART_Transmit(x);
fal=fal%100;
x=(fal/10)+48;
USART_Transmit(x);
x=(fal%10)+48;
USART_Transmit(x);
transmit_str("sec");
USART_Transmit(' ');
USART_Transmit(' ');
}
}
