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VLadw's avatar
VLadw
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6 years ago

I have a cyclone 5 gx starter kit where i am trying to create a hardware that counts number of pulses generated by a source? according to logic count should increase every negative edge by one but actually it increases by 7 or 8.

pulses are generated by a speed encoder that gives one pulse per revolution. input is taken by GPIO header pin 2 i.e. pin D26 on my FPGA Board device : 5CGXFC5C6F27C7 cyclone 5 family code used: ...
Rahul_S_Intel1's avatar
Rahul_S_Intel1
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6 years ago

Hi ,

Code is generic, but do check exact physical data is coming to the GPIO pin

VLadw's avatar
VLadw
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6 years ago

Sir i tested and made sure that the inputs to the pin is a perfect wave and according to your comment i can conclude code is good. so last thing only stays may be when there is no signal on pin it toggles itself so adding a pull-up might work i guess. thanks you very much for clearing my doubts towards the code i am actually new to this and started developing since last few days.

will highlight if found any solution

thank u for the response.