init register TCCR1A to phase correct 8 Bit pwm mode
init register TCCR1A to phase correct 8 Bit pwm mode; now really
improve stability of pulse lengths; trigger setup routine even after brown-out because if vcc is plugged in, a brown-out is detected and setup is never entered; calculate a separate scaling factor for ahead and astern
improve timer compare register calculation
Merge branch 'phase_correct_pwm'