HDL Coder atan / atan2

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TS
TS el 23 de Jun. de 2017
Comentada: TS el 5 de Jul. de 2017
Hi, I want to implement an algorithm containing atan2 in HDL with the HDL Coder. The trigonomic function block is supported (hdllib). Atan2 is avaiable for use with CORDIC and fixed point, yet the HDL Coder states that the Block is not supportet. How so?
If the block realy is not supportet, what are my options to implement atan2 or at least atan in HDL using the HDL Coder?

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Kiran Kintali
Kiran Kintali el 23 de Jun. de 2017
currently, atan2 is supported with single inputs.
CORDIC Atan2 with fixpt inputs is on the roadmap. What is the fixpt input wordlength you expect to use? if it is small wordlength you can use a lookup table. if it is large you are better off using the single precision solution which supports a large dynamic range.
thanks

Más respuestas (2)

Bharath Venkataraman
Bharath Venkataraman el 23 de Jun. de 2017
You can use the Complex To Magnitude Angle block which does atan2 using CORDIC.
  1 comentario
TS
TS el 5 de Jul. de 2017
Thanks for this idear. Works well

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TS
TS el 23 de Jun. de 2017
Hi, Thanks for the quick answer. And atan is also not supported for fixed point implementation? Please note that im on 2016a so i cant use native floating point support. Is there an integrated way in matlab to generate a lookup table in my desired fixed point format (fixed 16,10)

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