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Altera_Forum's avatar
Altera_Forum
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15 years ago

Cosine and Sine lookup table in vhdl

Hi i'm new to vhdl and I need a cosine and sine lookup table file in vhdl file already DONE.. because I don't have much time.. please help! thanks.
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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Attached a direct LUT in vhdl

The input theta_in is the address, you can increment it as you wish to skip samples e.g. increment by 1 to use full table or by 2 to use half table or by 4 to use quarter table and so on.

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:D Helo!!! could you tell me, how to use this table?? the input theta is in dreegres?? and, how I have to interpret the outputs.

thanks