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Altera_Forum
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14 years ago

VHDL Math Real & Quartus

I've been using the VHDL package ieee.math_real to declare parameters, the idea being to condense as much information in a design file as possible. in particular, for fixed point operations in feedba...
Altera_Forum's avatar
Altera_Forum
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14 years ago

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Right, that was what FVM was getting at. You can clear that particular error by using 'constant RecipFactor' instead of 'variable RecipFactor'.

Cheers,

Dave

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James' question was why he got an error for the 'variable' construct not whether his code was any good. He specifically wanted to show the '1/sqrt(3)' in his equation instead of an obscure 0.577350269, which is a sound idea. There are workarounds where he wouldn't have to use a division ( pow(sqrt(3.0), -1.0) , but again that would be not pure ...

Of course Frank's remark stays valid.

But judging by his silence James has found what he was looking for?