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Altera_Forum
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8 years ago

Simulation of Cordic sincos IP core: Wrong signals for negative input signals

Hi, i have problems with the Cordic sincos IPcore (https://www.altera.com/en_US/pdfs/literature/ug/ug_cordic.pdf). When i do the simulation, for positive signals i get the right signals but f...
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Altera_Forum
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8 years ago

I solved the problem, i just made a beginner failure. My problem was that i didnt know how to depict a negativ binary representation right.

For example the input value above representing -pi is wrong, the right representation for -pi is: 1001101101111000000100101100 (1 sign bit, two integer bits, 25 fractional bits)

Therefore i wasn't able to evaluate the simulation right. So everything is working fine.