/*
 * System.h
 *
 *  Created on: 10.02.2013
 *      Author: skuser
 */

#ifndef SYSTEM_H
#define SYSTEM_H

#include <avr/io.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <stddef.h>
#include <stdbool.h>
#include "Common.h"

#define F_RTC   1000
#define SYSTEM_MILLISECONDS_TO_RTC_CYCLES(x) \
    ( (uint16_t) ( (double) F_RTC * x / 1E3 + 0.5) )

//    Tick about 120ms
#define SYSTEM_TICK_WIDTH	7 /* Bits */
#define SYSTEM_TICK_PERIOD    106        /* (1<<7) */
#define SYSTEM_TICK_MS		(SYSTEM_TICK_PERIOD)
#define SYSTEM_TICK_FREQ	(1000 / SYSTEM_TICK_PERIOD)

#define SYSTEM_SMODE_PSAVE	SLEEP_SMODE_PSAVE_gc
#define SYSTEM_SMODE_IDLE	SLEEP_SMODE_IDLE_gc

/* Use GPIORE and GPIORF as global tick register */
#define SYSTEM_TICK_REGISTER	(*((volatile uint16_t*) &GPIORE))

void SystemInit(void);
void SystemReset(void);
void SystemEnterBootloader(void);
void SystemStartUSBClock(void);
void SystemStopUSBClock(void);
void SystemInterruptInit(void);
bool SystemTick100ms(void);

INLINE void SystemTickClearFlag(void) {
    while (RTC.STATUS & RTC_SYNCBUSY_bm)
        ;

    RTC.INTFLAGS = RTC_COMPIF_bm;
}

INLINE uint16_t SystemGetSysTick(void) {
    return SYSTEM_TICK_REGISTER | RTC.CNT;
}

#endif /* SYSTEM_H */