Commit 531e1e0e authored by Daniel Friesel's avatar Daniel Friesel
Browse files

stm32f446re: configurable clock speed

parent 7b962b22

src/arch/stm32f446re-nucleo/Makefile.inc

+6 −0
Original line number Diff line number Diff line
@@ -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}

src/arch/stm32f446re-nucleo/arch.cc

+10 −1
Original line number Diff line number Diff line
@@ -10,8 +10,17 @@ 


void Arch::setup(void)

{

	// NUCLEO-F443RE uses 8MHz STLINK clock as input

	// NUCLEO-F443RE uses 8MHz STLINK clock (MCO from STLINK MCU) as input

	// (it is connected to OSC_IN -> HSE OSC)

#if F_CPU == 180000000UL

	rcc_clock_setup_pll(&rcc_hse_8mhz_3v3[RCC_CLOCK_3V3_180MHZ]);

#elif F_CPU == 168000000UL

	rcc_clock_setup_pll(&rcc_hse_8mhz_3v3[RCC_CLOCK_3V3_168MHZ]);

#elif F_CPU == 84000000UL

	rcc_clock_setup_pll(&rcc_hse_8mhz_3v3[RCC_CLOCK_3V3_84MHZ]);

#else

#error Unsupported F_CPU

#endif



	// counter

	rcc_periph_clock_enable(RCC_TIM2);