convert of floating point number to binary in VHDL

[mariajohn]

hai

i need to knw is it possible to convert a floating point number to binary representation and vice versa....
im using xilinx ise 9.2i....
plz help.....

 

[farhada]

convert of floating point number to binary

Can you explain what you really mean? I am sure you will find your answer on WiKiPedia:
https://en.wikipedia.org/wiki/Floating_point

Best regards,
/Farhad Abdolian

 

[mariajohn]

hai
im doing my project which deals with implementing a PID controller in FPGA...
im currently writing its coding considering integer inputs....
but i want to give floating point and fixed numbers as input....
so is it posiible to do the floating point operations in VHDL????

im using xilinx ise 9.2i.....
thanks and regards
maria

 

[farhada]

HI Maria,
I would really recommend you read the following papers:

**broken link removed**

You can also find an open source FPGA library at this company's web site:

**broken link removed**

Reading that paper will give you a good understanding of what can be done inside an FPGA, and for implementation, you can use the codes in the library of OPTNGN site.

Hope it helps,

Best regards,
/Farhad Abdolian

 

[mariajohn]

thank you very much
i was not able to get that site at first,but today i got that...
thank you once again

 

[Aser]

3 topics may be.
1. You have to design the application specific processor which deals with the high-speed floating point.
Then you would better take the IP core. Core from Xilinx Coregen would do.
2. The usual processor.
Then you make a subprogram for your microcontroller using the usual algorithm.
3. You have to test your project with a test vectors which are float numbers.
Then you write the usual type transform function call like
Ystdv<=conv_std_logic_vector(integer(Data_in*ScaleCoef),32);