Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

How to implement a code that uses floating-point?

Hello, How should I do to implement in VHDL, a code that calculates the following equation: u(k) = 622,5u(k-1) + 0,6279u(k-2) + 651,2e(k) + 0,000814e(k-1) - 651,2e(k-2). I am a beginner in VHDL and d...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

--- Quote Start ---

fixed point representation uses as many bits as you require. The beauty of fixed point is that it is just an integer offset by 2^n, so you can use the multipliers on the FPGA and the latency is really small (is its just integer arithmatic).

Also, with a massive range of co-efficients, do you really need such small ones? will they really have much of an effect on the output?

--- Quote End ---

I really need the small values, because they are part of an equation of the controller. Sorry, but What you mean by that "with a massive range of co-efficients" ???