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stm32/f0: enable clocking from HSE crystal

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The following four new functions enable clocking SoC from HSE crystal:
	rcc_clock_setup_in_hse_8mhz_out_{8,16,32,48}mhz

These functions start HSE as external clock and feed its output to PLL
if higher frequency is needed.

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Reviewed-by: Karl Palsson <karlp@tweak.net.au>
 -> Dropped 8,16,32Mhz functions as superfluous.
This commit is contained in:
Sergey Matyukevich
2016-12-17 22:21:41 +03:00
committed by Karl Palsson
parent ef668edef6
commit 7cacbbfb8d
2 changed files with 28 additions and 0 deletions
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include/libopencm3/stm32/f0/rcc.h
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@@ -525,6 +525,7 @@ void rcc_set_hpre(uint32_t hpre);
void rcc_set_prediv(uint32_t prediv);
enum rcc_osc rcc_system_clock_source(void);
enum rcc_osc rcc_usb_clock_source(void);
void rcc_clock_setup_in_hse_8mhz_out_48mhz(void);
void rcc_clock_setup_in_hsi_out_8mhz(void);
void rcc_clock_setup_in_hsi_out_16mhz(void);
void rcc_clock_setup_in_hsi_out_24mhz(void);