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Altera_Forum
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14 years ago

Floating Point atan Megafunction

Hi everyone, I'm building a range finding system and i'm trying to build an I/Q demodulator in order to get the phase of an input signal. I'm using an Cyclone III FPGA on a developement Kit. In...
Altera_Forum's avatar
Altera_Forum
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14 years ago

I found, that the altfp_atan has a bug in Quartus V11.0, that clk_en erroneously defaults to '0'. So if you don't use and enable the clk_en port in the MegaFunction instance, the atan function is disabled.

I agree however with dsl, that it seems more appropriate to write a fixed point implementation, due to the huge resource consumption of the float version.