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-rw-r--r--avr/Tupfile3
1 files changed, 1 insertions, 2 deletions
diff --git a/avr/Tupfile b/avr/Tupfile
index 68a6ae0..2e9cae8 100644
--- a/avr/Tupfile
+++ b/avr/Tupfile
@@ -38,8 +38,7 @@ else
DEFS += -DMCU_STRING=\"ATmega2561\"
endif
-F_CPU = 18432000UL
-DEFS += -DF_CPU=$(F_CPU)
+DEFS += -DF_CPU=@(F_CPU)
INCLUDES += -I$(TOP)/include