timer_cm3.h

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#ifndef TIMER_CM3_H
#define TIMER_CM3_H

#include "cfg/cfg_timer.h"     /* CONFIG_TIMER */

#include <cpu/detect.h>
#include <cpu/irq.h>

#if CPU_CM3_LM3S
    #include <io/lm3s.h>
#elif CPU_CM3_STM32
    #include <io/stm32.h>
#elif CPU_CM3_SAM3
    #include <io/sam3.h>
/*#elif  Add other families here */
#else
    #error Unknown CPU
#endif

#define TIMER_ON_GPTM  1

#define TIMER_DEFAULT  TIMER_ON_GPTM ///< Default system timer

#if (CONFIG_TIMER == TIMER_ON_GPTM)
    /* Ticks frequency (HZ) */
    #define TIMER_TICKS_PER_SEC 1000

    /* Frequency of the hardware high-precision timer. */
    #define TIMER_HW_HPTICKS_PER_SEC (CPU_FREQ)

    /* Maximum value of the high-precision hardware counter register */
    #define TIMER_HW_CNT (CPU_FREQ / TIMER_TICKS_PER_SEC)

    typedef uint32_t hptime_t;
    #define SIZEOF_HPTIME_T 4

    /* Timer ISR prototype */
    ISR_PROTO_CONTEXT_SWITCH(timer_handler);
    #define DEFINE_TIMER_ISR DECLARE_ISR_CONTEXT_SWITCH(timer_handler)

    INLINE void timer_hw_irq(void)
    {
    }


    INLINE bool timer_hw_triggered(void)
    {
        return true;
    }

    INLINE hptime_t timer_hw_hpread(void)
    {
        return (TIMER_HW_CNT - NVIC_ST_CURRENT_R);
    }

#else

    #error Unimplemented value for CONFIG_TIMER
#endif /* CONFIG_TIMER */

void timer_hw_init(void);
void timer_hw_exit(void);

#endif /* TIMER_CM3_H */