DirA:        0*L->H,        1*H->L
    DirB:        1*L->H,        0*H->L
 EnableA:        0*L->H,        0*H->L
 EnableB:        0*L->H,        0*H->L
   StepA:   234999*L->H,   234999*H->L, Max High=10us Total High=923957us
   StepB:        2*L->H,        2*H->L, Max High=12us Total High=25us
Position[A]=37271

Position[B]=2

Time in FillISR  max=776 us, total=1220640 us

Time in StepA  max=10 us, total=923957 us

Time in StepB  max=12 us, total=25 us

Time in StepISR  max=6 us, total=894406 us