PROGRAMMING Atmega 16.. Doubts

[Muralikrishna R]

i got a sensor which measures speed from TYRE and give out different digital pulses at different speeds(ie frequency is different as speed changes=Pwm). MY INTENTION is,for a particular frequency (coreponding to a specified speed) say 20Hz,i need to make an output pin HIGH. I wrote the program for TIMER COUNT, and to make the output high.

NOW, I WANNA know to which pin i should give the SENSOR OUTPUT ie the pwm signal, which is the input to my ATMEGA 16. Through Input capture pin? If so,how do i configure it.

Please do help.

my code so far: all i need is an input pwm to ATMEGA 16

 

#include <avr/io.h>

 

int main (void)

{

DDRB |= (1 << 0); // Set LED as output

 

TCCR1B |= (1 << CS10); // Set up timer

 

for (;

{

// Check timer value in if statement, true when count matches 1/20 of a second

if (TCNT1 >= 49999)

{

PORTB ^= (1 << 0); // Toggle the LED

 

TCNT1 = 0; // Reset timer value

}

}

}

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