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 * enabled, but global interrupts need to be enabled by the application.
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 * enabled, but global interrupts need to be enabled by the application.
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 */
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 */
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void Timebase_Init() {
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void Timebase_Init() {
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    #if defined(__AVR_ATmega8__)
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    #if defined(__AVR_ATmega8__)
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    #if TIMEBASE_PRESCALE = 64
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    #if TIMEBASE_PRESCALE == 64
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    TCCR0 = (1<<CS01) | (1<<CS00);  // prescaler: 64
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    TCCR0 = (1<<CS01) | (1<<CS00);  // prescaler: 64
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    #elif TIMEBASE_PRESCALE = 256
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    #elif TIMEBASE_PRESCALE == 256
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    TCCR0 = (1<<CS02);              // prescaler: 256
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    TCCR0 = (1<<CS02);              // prescaler: 256
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    #endif
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    #endif
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    TCNT0 = TIMEBASE_RELOAD; // set initial reload-value
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    TCNT0 = TIMEBASE_RELOAD; // set initial reload-value
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    TIFR  |= (1<<TOV0);  // clear overflow int.
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    TIFR  |= (1<<TOV0);  // clear overflow int.
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    TIMSK |= (1<<TOIE0); // enable overflow-interrupt
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    TIMSK |= (1<<TOIE0); // enable overflow-interrupt