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in another tutorial I also learned how to simulate the Nios behavior running C code.
But as I mentioned I need to talk to my component through C code running on Nios
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Take the project that you learned how to simulate NIOS running C code, and just add your component and change your C code. It should be very simple to do.
Regarding your PLL simulation problem, I'm not sure what that is, but for what it's worth: try to avoid adding PLL's in your simulation-only-projects. Just declare new Clock Source's with your defined frequencies and let Qsys take care of it (instead of having Modelsim simulate PLL logic).
Honored Contributor
