projector - delay function screws rpm measurement

Forum 2005-2010 (read only) General Frequently-Asked Questions
6

Tried to paste the first 3 lines , and got "timsk1 was not declared in scope..."

also I assume "SET_PULSE_HIGH(OutPort, OutBit); " is a leftover from some other code..?

#include <stdint.h>
#include <avr/interrupt.h>
#include <avr/io.h>
#include <avr/pgmspace.h>


 volatile byte rpmcount;


 void rpm_fun()
 {
   rpmcount++;
   //Each rotation, this interrupt function is run 
 }


 void setup()
 {
   Serial.begin(19200);
   attachInterrupt(0, rpm_fun, FALLING);
   
  TCCR1A = 0x00;      // COM1A1=0, COM1A0=0 => Disconnect Pin OC1 from Timer/Counter 1 -- PWM11=0,PWM10=0 => PWM Operation disabled 
  TCCR1B = 0x02;      // 16MHz clock with prescaler means TCNT1 increments every .5 uS (cs11 bit is set)
  TIMSK1 = 0x00;      // Timer1 interrupts off  
   
 }




 void loop()
 {  
 }