// backlight PWM generation
// use timer 2 in fast PWM mode for this
PORTB.7 != PORTB.7; // clear port before enable
DDRB.7 |= DDRB.7; // will be used for OC2, must be output
TCCR2 = (1 << WGM21) | (1 << WGM20) | (1 << COM21) | (1 << CS20);
TCNT2=0x00;
OCR2=120;