Forum Discussion
New ContributorFloating point representations in VHDL
I am using MAX10 FPGA for closed-loop control of the DC-DC Converter with PI implemented in MAX10 using VHDL. I wanted to know how to represent floating-point(decimal for e.g. 1.23, 0.31) values in FPGA using VHDL for the parameters of PI Controller.
5 Replies
SyafieqSSuper Contributor
Hi Kousik,
You can refer to FP mega function as link below.
Hopefully it helps
https://www.intel.cn/content/dam/altera-www/global/zh_CN/pdfs/literature/ug/ug_altfp_mfug.pdf
FvMHello,
I doubt that's a good idea to use actual floating point numbers for your PI controller. Quartus floating point IP (FP mega function) is useful, if your application needs to expose a floating point data interface to communication partners. To represent fractional decimal numbers like 1.23, 0.31, almost every FPGA application uses integer numbers with an implied power of 2 scaling factor. You use VHDL fixed_pkg or own methods with similar functionality.
Frank- SyafieqS
Thank you FvM and that make sense, I thought he was looking for any IP that need to use floating function. If that's so, Kousik, you can use VHDL predefined package (use ieee.float_pkg.all), may refer to link below for details
- SyafieqS
Kousik,
Let me know if there is any update
- SyafieqS
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