2 Replies Latest reply on Mar 29, 2016 12:03 AM by rfc_1549836

    Frequency counter

    rfc_1549836

      I've built a frequency counter on PSOC 4 (CY8CKIT-49-42XX), starting from one example found on Internet.
      I'm using UDB block just to learn to use them. (May be simplest?)
      The project seem to work , but the frequency shown on LCD isn't precise. The readouts on display oscillate  around 6 -7 % lower, from the correct value (compared with external frequency meter and oscilloscope).
      I'm not sure why, may be the clock reference? This clock is precise within 1% (as declared on composer), so I doen't aspect  a so large oscillation.
      Where is my mistake? Can the clock reference be the cause my error, or is something on my implementation?
      Better if I use an external clock?

         

      Attached the project.

         

      Thanks for help,
      Fabrizio