Ya delayu proshe 4em Atmel: Nu na vxode estestvenno filtruesh' spikes (xotya bi i tak kak u Atmel) a zatem prosto formiryu A/B rise/fall edges event pulses i elementarno logu4eski iz A,B,A_rise,A_fall,B_rise,B_fall signals drive up/down events for postion counter...(voobshe ne lublu state mashins, prosto ne perevarivayu)