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Altera_Forum's avatar
Altera_Forum
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15 years ago

Float to Fixed Point in FPGA

Hi there. I have DSP code in C with floating point, now I try to convert to FPGA to use fixed point. Can you guys show me how to do it? I did little research document from http://www.vh...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

you need to scale according to your target range. If a signal is swinging say +/-1 then to scale it for 10 bit signed you need the max value of 1 = 511 and so on:

value = round(511*signal/max(abs(signal)));

You may go lower for any other reason.