timer_lpc2.h

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#ifndef DRV_LPC2_TIMER_H
#define DRV_LPC2_TIMER_H

#include <hw/hw_cpufreq.h>     /* CPU_FREQ */

#include "cfg/cfg_timer.h"     /* CONFIG_TIMER */
#include <cfg/compiler.h>      /* uint8_t */
#include <cfg/macros.h>        /* BV */

#include <io/lpc23xx.h>

#define TIMER0_COMPARE0 0  ///< System timer on Timer0 Compare match0

#define TIMER_DEFAULT TIMER0_COMPARE0  ///< Default system timer

/*
 * Hardware dependent timer initialization.
 */
#if (CONFIG_TIMER == TIMER0_COMPARE0)
    ISR_PROTO_CONTEXT_SWITCH(timer_handler);
    #define DEFINE_TIMER_ISR     DECLARE_ISR_CONTEXT_SWITCH(timer_handler)

    #define TIMER_TICKS_PER_SEC  1000
    #define TIMER_HW_CNT         (CPU_FREQ / TIMER_TICKS_PER_SEC - 1)

    #define TIMER_HW_HPTICKS_PER_SEC (CPU_FREQ)

    typedef uint32_t hptime_t;
    #define SIZEOF_HPTIME_T 4

    INLINE void timer_hw_irq(void)
    {
        /* Reset The match0 irq flag */
        T0IR = 0x01;
        /* Signal the VIC we have completed the ISR */
        VICVectAddr = 0;    
    }

    INLINE bool timer_hw_triggered(void)
    {
        return true;
    }

    INLINE hptime_t timer_hw_hpread(void)
    {
        return T0TC;
    }

#else

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

void timer_hw_init(void);


#endif /* DRV_LPC2_TIMER_H */