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-rw-r--r--src/arch/stm32f446re-nucleo/Makefile.inc6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/arch/stm32f446re-nucleo/Makefile.inc b/src/arch/stm32f446re-nucleo/Makefile.inc
index 8dfaecd..31d6015 100644
--- a/src/arch/stm32f446re-nucleo/Makefile.inc
+++ b/src/arch/stm32f446re-nucleo/Makefile.inc
@@ -55,6 +55,12 @@ ifneq ($(findstring counter,${arch_drivers}), )
CXX_TARGETS += src/arch/stm32f446re-nucleo/driver/counter.cc
endif
+ifneq (${cpu_freq}, )
+ COMMON_FLAGS += -DF_CPU=${cpu_freq}UL
+else
+ COMMON_FLAGS += -DF_CPU=168000000UL
+endif
+
OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o} ${ASM_TARGETS:.S=.o}