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#ifndef TIMER_H_
#define TIMER_H_
#include "util.h"
#ifndef TIMER_CPS
# define TIMER_CPS 1000
#endif
#define TIMERCPS ((_timcnt_t)(TIMER_CPS))
#ifndef TIMER_BITLEN
# define TIMER_BITLEN 16
#endif
#if TIMER_BITLEN == 16
typedef uint16_t _timcnt_t;
typedef int16_t _signed_timcnt_t;
#elif TIMER_BITLEN == 24
typedef uint24_t _timcnt_t;
typedef int24_t _signed_timcnt_t;
#elif TIMER_BITLEN == 32
typedef uint32_t _timcnt_t;
typedef int32_t _signed_timcnt_t;
#else
# error "Invalid TIMER_BITLEN"
#endif
struct timer {
_timcnt_t count;
};
_timcnt_t _timer_get_now(void);
static inline _signed_timcnt_t _timer_ms_to_count(int32_t millisec)
{
return (_signed_timcnt_t)sdiv_round_up((int32_t)TIMERCPS * millisec,
(int32_t)1000);
}
static inline int32_t _timer_count_to_ms(_signed_timcnt_t count)
{
return sdiv_round((int32_t)count * (int32_t)1000,
(int32_t)TIMERCPS);
}
static inline _signed_timcnt_t _timer_count_since(const struct timer *timer)
{
return (_signed_timcnt_t)(_timer_get_now() - timer->count);
}
static inline int32_t timer_ms_since(const struct timer *timer)
{
return _timer_count_to_ms(_timer_count_since(timer));
}
bool timer_expired(const struct timer *timer);
static inline void timer_arm(struct timer *timer, int32_t millisec)
{
timer->count = (_timcnt_t)(_timer_get_now() +
(_timcnt_t)_timer_ms_to_count(millisec));
}
static inline void timer_set_now(struct timer *timer)
{
timer->count = _timer_get_now();
}
static inline void timer_add(struct timer *timer, int32_t millisec)
{
timer->count = (_timcnt_t)(timer->count +
(_timcnt_t)_timer_ms_to_count(millisec));
}
void timer_init(void);
#endif /* TIMER_H_ */
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