aaah! not have put librarys ... now undestand, I think there was there ... I did not know that some should be added..
ok its work !
can you explain me this part " FreqCounter::f_comp= 8; // Set compensation to 12 " what does?
now how can i make the calibration for the anemometer ? i have disk with rays and its work, i can see on display the changes (00101010001) how can i make a programme after on cycle or some time (may be 1 sec or lower is pretty ?) to telling me the speed of anemometer?