Precision frequency count with UDB counter

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stfrc_907376
Level 1
Level 1

Trying to capture a precise frequency count using an accurate hardware enable signal.  But the captured count is very unstable even with very accurate and stable inputs.  Is it possible to do this?

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NoriTan
Employee
Employee
25 sign-ins 5 questions asked 10 sign-ins

I have created a frequency counter on the PSoC 3 evaluation kit.  Please refer following github repository.

GitHub - noritan/Design275: Frequency counter revised - "CY8C3866AXI-040" on "CY8CKIT-030"

This project was developed on PSoC Creator 3.3 SP 2.3  So many components must be updated.

Following is a BLOG entry describing the project written in Japanese.  Please refer this page too.

PSoC 3 で作る周波数カウンタ:新適当マイコン電子工作研究所:So-net blog

Regards,

Noriaki

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Ekta_N
Moderator
Moderator
Moderator
750 replies posted First like given 250 solutions authored

Hello Steve,

Please have a look at the following document: Frequency measurement using Counter in PSoC 3 / PSoC 5

https://www.cypress.com/file/144696/download

The above project is used for measuring frequency of square wave. When the input is of some other waveform that does not have a rising edge (for example, sine wave or ramp), you must convert the input wave to square wave before giving it to the counter. The other waveforms can be converted to square wave using a comparator.

Also if possible can you please share your project.

Best Regards

Ekta

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