include/timer_tc.h

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#ifndef TIMER_H_INCLUDED
#define TIMER_H_INCLUDED

#include <types.h>
#include <assert.h>
#include <interrupt.h>
#include <irq_handler.h>

typedef uint32_t counter_t;

typedef uint16_t counter_high_t;
#define TIMER_MAX_DELAY         (1UL << ((8*sizeof(counter_t))-1))

typedef void (*timer_callback_t)(void *data);

struct timer_task {
        struct timer *timer;
        counter_t time_stamp;
        timer_callback_t callback;
        void *data;
        struct timer_task *next;
};

struct timer {
        void *port;
        uint32_t frequency;
        counter_high_t counter_high;
        bool action_pending;
        bool is_running;
        struct timer_task *first_task;
};


#ifdef __cplusplus
extern "C" {
#endif

static inline uint32_t timer_get_frequency(struct timer *timer)
{
        assert(timer);
        return timer->frequency;
}

static inline struct timer *timer_task_get_timer(struct timer_task *task)
{
        assert(task);
        return task->timer;
}

static inline void *timer_task_get_data(struct timer_task *task)
{
        assert(task);
        return task->data;
}

static inline void timer_reset_task(struct timer_task *task)
{
        assert(task);

        /* Clear next pointer to indicate unused item */
        task->next = NULL;
}

static inline void timer_init_task(
                struct timer_task *task,
                timer_callback_t callback,
                void *data)
{
        timer_reset_task(task);

        task->callback = callback;
        task->data = data;
}

void timer_init(struct timer *timer, void *port, uint32_t resolution);

extern counter_t timer_convert_us(struct timer *timer, uint32_t us);

void timer_add_task_ticks(
                struct timer *timer,
                struct timer_task *task,
                counter_t delay);

static inline void timer_add_task_us(
                struct timer *timer,
                struct timer_task *task,
                uint32_t delay_us)
{
        timer_add_task_ticks(timer, task, timer_convert_us(timer, delay_us));
}


#ifdef __cplusplus
} /* extern "C" */
#endif

#endif // TIMER_H_INCLUDED

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