lookup table using vhdl:

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sai geethika

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Hai! How to convert binary bits (eg."00") to digital symbols(eg."1/sqrt(2) ) using lookup tables in vhdl coding? Can anyone help me out please
 

Arithmetic functions (e.g. sqrt, division) are operating on numbers, not bits. These numbers have a digital representation. The first point, when thinking about lookup tables, is to specify numeric ranges and resolutions, then about a suitable numeric format, mostly fixed point.

There's a large amount of contributions related to lookup tables, see the similar threads tab as a first hint. Instead of making edaboard members retelling the stuff that have been already written, you should consult these previous threads. And come back with a more specific question, if necessary.
 

I need a help regarding a bit of lookup table program provided below:

case theta_int is

when 45 => sin_data_int <= to_signed(99,12); cos_data_int <= to_signed(1439,12);

what is the significance of "to_signed(99,12) and to_signed(1439,12)" ? I am unable to understand that one. Can anyone help me?
 

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