diff options
Diffstat (limited to 'irsndmain.c')
| -rw-r--r-- | irsndmain.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/irsndmain.c b/irsndmain.c index 213a4f8..ff4838c 100644 --- a/irsndmain.c +++ b/irsndmain.c @@ -30,18 +30,18 @@ void
timer1_init (void)
{
-#if defined (__AVR_ATtiny85__) // ATtiny85:
- OCR1A = (F_CPU / (2 * F_INTERRUPTS) / 2) - 1; // compare value: 1/28800 of CPU frequency, presc = 2
- TCCR1 = (1 << CTC1) | (1 << CS11); // switch CTC Mode on, set prescaler to 2
-#else // ATmegaXX:
- OCR1A = (F_CPU / (2 * F_INTERRUPTS)) - 1; // compare value: 1/28800 of CPU frequency
- TCCR1B = (1 << WGM12) | (1 << CS10); // switch CTC Mode on, set prescaler to 1
+#if defined (__AVR_ATtiny45__) || defined (__AVR_ATtiny85__) // ATtiny45 / ATtiny85:
+ OCR1A = (F_CPU / F_INTERRUPTS / 4) - 1; // compare value: 1/15000 of CPU frequency, presc = 4
+ TCCR1 = (1 << CTC1) | (1 << CS11) | (1 << CS10); // switch CTC Mode on, set prescaler to 4
+#else // ATmegaXX:
+ OCR1A = (F_CPU / F_INTERRUPTS) - 1; // compare value: 1/15000 of CPU frequency
+ TCCR1B = (1 << WGM12) | (1 << CS10); // switch CTC Mode on, set prescaler to 1
#endif
#ifdef TIMSK1
- TIMSK1 = 1 << OCIE1A; // OCIE1A: Interrupt by timer compare
+ TIMSK1 = 1 << OCIE1A; // OCIE1A: Interrupt by timer compare
#else
- TIMSK = 1 << OCIE1A; // OCIE1A: Interrupt by timer compare
+ TIMSK = 1 << OCIE1A; // OCIE1A: Interrupt by timer compare
#endif
}
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