X-Git-Url: http://cloudbase.mooo.com/gitweb/irmp.git/blobdiff_plain/83b279abfd3c6d7efc7764287c99f078b5843109..0f700c8ea4b0e9729805828c4fab5ab0fe2b6443:/main.c

diff --git a/main.c b/main.c
index 28bbe14..4e666da 100644
--- a/main.c
+++ b/main.c
@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2009-2011 Frank Meyer - frank(at)fli4l.de
  *
- * $Id: main.c,v 1.11 2011/09/20 10:45:28 fm Exp $
+ * $Id: main.c,v 1.12 2012/02/13 10:59:07 fm Exp $
  *
  * ATMEGA88 @ 8 MHz
  *
@@ -33,8 +33,15 @@ void
 timer1_init (void)
 {
 #if defined (__AVR_ATtiny45__) || defined (__AVR_ATtiny85__)                // ATtiny45 / ATtiny85:
+
+#if F_CPU >= 16000000L
+    OCR1C   =  (F_CPU / F_INTERRUPTS / 8) - 1;                              // compare value: 1/15000 of CPU frequency, presc = 8
+    TCCR1   = (1 << CTC1) | (1 << CS12);                                    // switch CTC Mode on, set prescaler to 8
+#else
     OCR1C   =  (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
+#endif
+
 #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