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#ifndef _TIMER_H
#define _TIMER_H
/* updates 18.2 times per second */
extern volatile uint32_t ticks;
void timer_init();
void timer_free();
void timer_user_fn(void (*fn)(void));
/* countdown clock */
void timer_start(uint8_t secs, volatile uint8_t *updated);
uint8_t timer_value();
void timer_stop();
void timer_resume();
#endif /* _TIMER_H */
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