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stm32: added peripheral clock get helpers for all stm32 platforms.

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Allows for abstraction for code that's dependent on knowing the source clock
for a peripheral. Implemented a few core peripherals that tend to have clock
tree differences between platforms (USART, timers, I2C, SPI).
This commit is contained in:
Brian Viele
2020-03-06 00:57:21 -05:00
committed by Karl Palsson
parent df55d45cc1
commit e41ac6ea71
24 changed files with 860 additions and 94 deletions
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include/libopencm3/stm32/f7/rcc.h
+9
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@@ -646,6 +646,10 @@
#define RCC_DCKCFGR2_UART2SEL_SHIFT 2
#define RCC_DCKCFGR2_UART1SEL_MASK 0x3
#define RCC_DCKCFGR2_UART1SEL_SHIFT 0
#define RCC_DCKCFGR2_UARTxSEL_PCLK 0
#define RCC_DCKCFGR2_UARTxSEL_SYSCLK 1
#define RCC_DCKCFGR2_UARTxSEL_HSI 2
extern uint32_t rcc_ahb_frequency;
extern uint32_t rcc_apb1_frequency;
@@ -986,6 +990,11 @@ void rcc_set_main_pll_hse(uint32_t pllm, uint32_t plln, uint32_t pllp,
uint32_t rcc_system_clock_source(void);
void rcc_clock_setup_hse(const struct rcc_clock_scale *clock, uint32_t hse_mhz);
void rcc_clock_setup_hsi(const struct rcc_clock_scale *clock);
uint32_t rcc_get_usart_clk_freq(uint32_t usart);
uint32_t rcc_get_timer_clk_freq(uint32_t timer);
uint32_t rcc_get_i2c_clk_freq(uint32_t i2c);
uint32_t rcc_get_spi_clk_freq(uint32_t spi);
END_DECLS
/**@}*/