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Rev 274 Rev 296
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        PORTC &= ~(1<<PORTC7);
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        PORTC &= ~(1<<PORTC7);
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        #endif
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        #endif
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        // Timer/Counter 0 Control Register A
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        // Timer/Counter 0 Control Register A
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        // Waveform Generation Mode is Fast PWM (Bits WGM02 = 0, WGM01 = 1, WGM00 = 1)
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    // Clear OC0A on Compare Match, set OC0A at BOTTOM, noninverting PWM (Bits COM0A1 = 1, COM0A0 = 0)
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    // Clear OC0B on Compare Match, set OC0B at BOTTOM, (Bits COM0B1 = 1, COM0B0 = 0)
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    TCCR0A &= ~((1<<COM0A0)|(1<<COM0B0));
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        // Waveform Generation None (Bits WGM02 = 0, WGM01 = 0, WGM00 = 0)
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    TCCR0A |= (1<<COM0A1)|(1<<COM0B1)|(1<<WGM01)|(1<<WGM00);
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    TCCR0A &= ~((1<<COM0A0)|(1<<COM0B0)|(1<<COM0A1)|(1<<COM0B1)|(1<<WGM01)|(1<<WGM00));
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        // divider 8 (Bits CS02 = 0, CS01 = 1, CS00 = 0)
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        // divider 8 (Bits CS02 = 0, CS01 = 1, CS00 = 0)
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        TCCR0B &= ~((1<<FOC0A)|(1<<FOC0B)|(1<<WGM02));
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        TCCR0B &= ~((1<<FOC0A)|(1<<FOC0B)|(1<<WGM02));
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    TCCR0B = (TCCR0B & 0xF8)|(0<<CS02)|(1<<CS01)|(0<<CS00);
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        // initialize the Output Compare Register A & B used for PWM generation on port PB3 & PB4
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    OCR0A =  0;  // for PB3
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    OCR0B = 120; // for PB4
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    TCCR0B = (TCCR0B & 0xF8)|(0<<CS02)|(1<<CS01)|(0<<CS00);
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        // init Timer/Counter 0 Register
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        // init Timer/Counter 0 Register
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    TCNT0 = 0;
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    TCNT0 = 0;