Getting Started

Chapter 7: Microcontroller Interrupts and Timers

:

;

0xFF;

reach the count

R2 && (1<<OCF2A)) );

er:

set our temp variable to 0xFFFF.

if ( (TIFR1 && (1<<TOV1)) )

{

FF

temp = (temp << 8);

Disable global interrupts:

cli();

Clear the timer interrupt flags

TIFR1 = 0xFF

TIFR2 =

Clear the timer counts:

TCNT1H = 0;

TCNT1L = 0;

TCNT2 = 0;

Wait for the timer to

while ( !(TIF

Stop the tim

TCCR1B = 0;

Enable global interrupts

sei();

Has Timer/Counter1 overflowed? If so

temp = 0xFFFF;//if timer1 overflows, set the temp to 0xFF

}

Otherwise read the timer1 counter value into the temp variable

else
{
tempL = TCNT1L;
temp = TCNT1H;