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#pragma once
#include <stdint.h>
enum clock_selection {
CLOCK_SELECTION_PLL = 0,
CLOCK_SELECTION_LSE,
CLOCK_SELECTION_LSI,
CLOCK_SELECTION_HSE,
};
typedef struct {
enum clock_selection sel;
union {
/* Divisor for the PLL. If set to 0, the default value of 5 is used. */
uint8_t pll_clock_divisor;
/* Divisor for the HSE. If set to 0, the default value of 5 is used. */
uint8_t hse_clock_divisor;
};
} clock_cfg_t;
// Called when the system clock is changed.
typedef struct {
void (*on_clk_change)(const clock_cfg_t* cfg);
} clock_chg_evt_listener_t;
/* Set the system clock configuration. */
int set_system_clock(const clock_cfg_t* clk_cfg);
/* Returns the clock configuration the system is currently in. */
int get_system_clock(clock_cfg_t* out);
/* Returns the frequency for the provided clock config. */
uint32_t get_clock_freq(const clock_cfg_t* clk_cfg);
void configure_lse(void);
#define on_system_clock_changed(name) \
void on_system_clock_changed__##name(const clock_cfg_t*); \
__attribute__(( \
__section__(".clock_change_listeners"))) clock_chg_evt_listener_t name = \
((clock_chg_evt_listener_t){.on_clk_change = \
on_system_clock_changed__##name}); \
void on_system_clock_changed__##name
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