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;