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Hello all, I am trying to interface rotary encoder with Spartan 3 E-board to generate a phase shift between two signals based on the count. It is interesting that it works some time and some time it does not show any shift. "theta" is the phase shift in the attached code and the four signals ar G1, G2, G3 and G4 as shown in the .png diagram. I would appreciate getting some guidance with the code in order to successfully generate phase shift. Thank you