timer.h

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#ifndef __TIMER_H__
#define __TIMER_H__

#define MAX_TIMER_CNT 8

typedef uint16_t clockid_t;

typedef struct
{
    void (*user_timer_handler)(void);             // user task
    uint8_t timer;                                // user task enabled ?
} TIMERS;

#ifndef SYSTEM_TASK_HZ
#error #define SYSTEM_TASK_HZ 1000L
#endif

#define SYSTEM_TASK_TIC_NS ( 1000000000L / SYSTEM_TASK_HZ )
#define SYSTEM_TASK_TIC_US ( 1000000L / SYSTEM_TASK_HZ )

#define CLOCK_HZ SYSTEM_TASK_HZ
#define CLOCK_TIC_NS SYSTEM_TASK_TIC_NS
#define CLOCK_TIC_US SYSTEM_TASK_TIC_US

/* timer.c */
MEMSPACE int set_timers ( void (*handler )(void ), int timer );
MEMSPACE int kill_timer ( int timer );
MEMSPACE void delete_all_timers ( void );
MEMSPACE void subtract_timespec ( ts_t *a , ts_t *b );
MEMSPACE char *ts_to_str ( ts_t *val );
MEMSPACE void display_ts ( ts_t *val );
MEMSPACE void clock_elapsed_begin ( void );
MEMSPACE void clock_elapsed_end ( char *msg );
MEMSPACE void clock_clear ( void );
MEMSPACE void disable_timers ( void );
MEMSPACE void enable_timers ( void );
void execute_timers ( void );
MEMSPACE void clock_init ( void );
void clock_task ( void );
MEMSPACE void init_timers ( void );
MEMSPACE int clock_getres ( clockid_t clk_id , struct timespec *res );
MEMSPACE int clock_settime ( clockid_t clk_id , const struct timespec *ts );

extern MEMSPACE int clock_gettime ( clockid_t clk_id , struct timespec *ts );
/* timer_hal.c */
MEMSPACE void disable_system_task ( void );
MEMSPACE void enable_system_task ( void );
MEMSPACE void install_timers_isr ( void );

#endif   // _TIMER_H_