X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/39f1c0c136520a3f4746ad6381d1242979125ff3..refs/heads/master:/firmware/clock.h

diff --git a/firmware/clock.h b/firmware/clock.h
index 0183297a5..38e4331f8 100644
--- a/firmware/clock.h
+++ b/firmware/clock.h
@@ -11,9 +11,11 @@
 #ifndef __clock_h_included__
 #define	__clock_h_included__
 
+#ifndef F_CPU
 #define F_CPU           12000000L   /* 12MHz */
+#endif
 #define TIMERVALUE      TCNT0
-#define CLOCK_T_320us	60
+#define CLOCK_T_320us	(320 * (F_CPU/1000000L) / 64)
 
 #ifdef __AVR_ATmega8__
 #define TCCR0B  TCCR0