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Altera_Forum
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9 years ago

Incremental Motor Encoder -- How Best to Count Transitions

I need to count the transitions (high and low) of a incremental motor encoder. I wrote a simple async counter, using only the encoder output signal as the my stimulus (i.e. always @ (posedge ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

The fmax should be reported in the compilation report as it is a seperate clock. The fmax is then the frequency of the counter, but also keep an eye on the duty cycle. I assume it cannot be too high or low. I have absolutely no idea about the minimum pulse width.

Also don't forget to implement a synchroniser between the two clock domains. Unsynchronised data transfers could result in strange behaviour.

I don't know about any IP for this.