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Honored Contributor
Honored ContributorHelp me about measure clock on osciloscope.
Hi everyone, I have project on board DE2. I use PLL in megafunction to create the clock 500MHz from 50MHz. Then i use clock counter to decrease the clock from 500MHz to clock_out 250KHz, 125KHz, 6...
Altera_ForumHonored Contributor
Honored ContributorI understand, that you already did some basic timing checks with your design, as you reported it "failed at 500 MHz". The classical timing analyzer would be sufficient for this simple purpose. You can also expect, that Quartus doesn't allow assignment of "unreachable" pins or similar. In so far, only a few basic issues, that can't be checked by Quartus, may explain the said problem:
- you specified a clock input, that isn't actually connected to a DE2 clock oscillator - you send the output to a Cyclone II pin other than connected to the expected GPIO - you generated an output signal, that's too short to be viewed by your equipment - you didn't manage to downlöoad the correct configuration - your DE2 board isn't working correctly Please apologize that I consider such basic issues, but they happen every day.
