How to create sine and cos waves of different frequencies using Cyclone III(VHDL)

Hi Tricky,

I have learnt VHDL and I suppose I have some knowledge of this language.

But just for this application, I have not clear idea to achieve this.

In my mind, I want to use Look up table, due to the ADA board is 14 bits, and I have generated the different values in Excel for one cycle, I am not sure should I generate all 2^14 values or not.

Thanks for your reply.

Best wishes,

peipei

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If you have no VHDL knowledge, my first suggestion would be to find a good tutorial and get yourself familiar with the language.

As for the sin waves, sine and cosine are identical, but with a phase shift. It would be easy enough to build a ROM of sin values in VHDL and just read them out.

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