portable/GCC/AVR_Mega0/porthardware.h

#ifndef PORTHARDWARE_H
#define PORTHARDWARE_H

#include "FreeRTOSConfig.h"

/*-----------------------------------------------------------*/

#define CLR_INT(FLAG_REG, FLAG_MASK) \
        asm volatile( \
            "push r16\n\t" \
            "ldi r16, %1\n\t" \
            "sts %0, r16\n\t" \
            "pop r16\n\t" \
            : \
            : "i"(_SFR_MEM_ADDR(FLAG_REG)),"i"((uint8_t)(FLAG_MASK)) \
        );

#if ( configUSE_TIMER_INSTANCE == 0 )

    #define TICK_INT_vect       TCB0_INT_vect
    #define INT_FLAGS           TCB0_INTFLAGS
    #define INT_MASK            TCB_CAPT_bm

    #define TICK_init()         { \
                                TCB0.CCMP    = configCPU_CLOCK_HZ / configTICK_RATE_HZ; \
                                TCB0.INTCTRL = TCB_CAPT_bm; \
                                TCB0.CTRLA   = TCB_ENABLE_bm; \
                                }

#elif ( configUSE_TIMER_INSTANCE == 1 )

    #define TICK_INT_vect       TCB1_INT_vect
    #define INT_FLAGS           TCB1_INTFLAGS
    #define INT_MASK            TCB_CAPT_bm

    #define TICK_init()         { \
                                TCB1.CCMP    = configCPU_CLOCK_HZ / configTICK_RATE_HZ; \
                                TCB1.INTCTRL = TCB_CAPT_bm; \
                                TCB1.CTRLA   = TCB_ENABLE_bm; \
                                }

#elif ( configUSE_TIMER_INSTANCE == 2 )

    #define TICK_INT_vect       TCB2_INT_vect
    #define INT_FLAGS           TCB2_INTFLAGS
    #define INT_MASK            TCB_CAPT_bm

    #define TICK_init()         { \
                                TCB2.CCMP    = configCPU_CLOCK_HZ / configTICK_RATE_HZ; \
                                TCB2.INTCTRL = TCB_CAPT_bm; \
                                TCB2.CTRLA   = TCB_ENABLE_bm; \
                                }

#elif ( configUSE_TIMER_INSTANCE == 3 )

    #define TICK_INT_vect       TCB3_INT_vect
    #define INT_FLAGS           TCB3_INTFLAGS
    #define INT_MASK            TCB_CAPT_bm

    #define TICK_init()         { \
                                TCB3.CCMP    = configCPU_CLOCK_HZ / configTICK_RATE_HZ; \
                                TCB3.INTCTRL = TCB_CAPT_bm; \
                                TCB3.CTRLA   = TCB_ENABLE_bm; \
                                }

#elif ( configUSE_TIMER_INSTANCE == 4 )

    #define TICK_INT_vect       RTC_CNT_vect
    #define INT_FLAGS           RTC_INTFLAGS
    #define INT_MASK            RTC_OVF_bm

    /* Hertz to period for RTC setup */
    #define RTC_PERIOD_HZ(x)    ( 32768 * ( ( 1.0 / x ) ) )
    #define TICK_init()         { \
                                while (RTC.STATUS > 0); \
                                RTC.CTRLA    = RTC_PRESCALER_DIV1_gc | 1 << RTC_RTCEN_bp; \
                                RTC.PER      = RTC_PERIOD_HZ(configTICK_RATE_HZ); \
                                RTC.INTCTRL  |= 1 << RTC_OVF_bp; \
                                }

#else
    #undef TICK_INT_vect
    #undef INT_FLAGS
    #undef INT_MASK
    #undef TICK_init()
    #error Invalid timer setting.
#endif

/*-----------------------------------------------------------*/

#endif /* PORTHARDWARE_H */