Code

inline void isr_code(void)
{
// Reinitialize Timer4's value
     TCNT4 = 0xff06;
     // TODO: Add your code here
     //wdt_reset();
     timer4_ticker_1kHz++;   
}

ISR(TIMER4_OVF_vect)
{
   isr_code();          
}
 

Code

#if defined(__DOXYGEN__)
/** \def ISR(vector [, attributes])
    \ingroup avr_interrupts

    \code #include <avr/interrupt.h> \endcode

    Introduces an interrupt handler function (interrupt service
    routine) that runs with global interrupts initially disabled
    by default with no attributes specified.

    The attributes are optional and alter the behaviour and resultant
    generated code of the interrupt routine. Multiple attributes may
    be used for a single function, with a space seperating each
    attribute.

    Valid attributes are ISR_BLOCK, ISR_NOBLOCK, ISR_NAKED and
    ISR_ALIASOF(vect).

    \c vector must be one of the interrupt vector names that are
    valid for the particular MCU type.
*/
#  define ISR(vector, [attributes])
#else  /* real code */

#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
#  define __INTR_ATTRS used, externally_visible
#else /* GCC < 4.1 */
#  define __INTR_ATTRS used
#endif

#ifdef __cplusplus

#  define ISR(vector, ...)            \
    extern "C" void vector (void) __attribute__ ((signal,__INTR_ATTRS)) __VA_ARGS__; \
	void vector (void)

#else

#  define ISR(vector, ...)            \
    void vector (void) __attribute__ ((signal,__INTR_ATTRS)) __VA_ARGS__; \
    void vector (void)
#endif

#endif /* DOXYGEN */