System.h

/*
 * 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) )

#define SYSTEM_TICK_WIDTH   7 /* Bits */
#define SYSTEM_TICK_PERIOD  (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);
INLINE bool SystemTick100ms(void);

INLINE bool SystemTick100ms(void) {
    if (RTC.INTFLAGS & RTC_COMPIF_bm) {
        while (RTC.STATUS & RTC_SYNCBUSY_bm)
            ;

        RTC.INTFLAGS = RTC_COMPIF_bm;
        return true;
    }

    return false;
}

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 */