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kamwad
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Registered: ‎06-17-2008

Data type Real

Hi there,

I am trying to implement an IIR filter in VHDL.

I have managed to generate the HDL code through SIMULINK FDA tool.

Now, this code has got a data type 'Real' and It gives an error message in Xillinx.

Does anyone know if 'Real' is supported data type in VHDL (for synthesis as well)?

I have decided to deal with fixed point numbers but still i need to represent the real numbers.

As, I need the Real numbers for my filter coefficients of the filter, any suggestions how to represent such numbers?

And it can be a signed number as well like -2.3, 32.465 2.01E-5 etc.

And these numbers can be taken as input from the user in the test bench as well.

Any other suggestions regarding the IIR filter are welcome as well.

Kind Regards,

Kamran

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