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Altera_Forum
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8 years ago

how to calculate sin inverse (ARCSIN) in VHDL?

I am using altera de0 nano soc fpga, and quartus 16.1 lite edition. I found that to calculate sin, cos and atan Altera's CORDIC IP core can be used.or lookup table (LUT) can be used for sin or cos .b...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

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You can calculate the table initialization in VHDL, using ieee.math_real.arcsin.

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I made a lookup table using excel and i put values in to switch case. and i get overlaps when accessing sin inverse. because when getting inverse of sine we point to a place at sin wave and get the phase of it. since sin wave is increasing and decreasing uniquely i get same amplitude levels twice when it increasing and decreasing. how to solve this. ?