FPGA Type Cast U32 to SGL

[JCC_(SK)]

In LabVIEW 2012 you could use Single-Precision Floating-Point Data Type

In my project I needed to type cast same U32 data to SGL type DMA stream (to CPU), but LabVIEW FPGA doesn't support this type cast. I have to create my own U32 to SGL Type Cast.

I used IP Integration Node and VHDL code to create Type Cast U32 number to SGL.

--------------------------------------

-- typecast from U32 to SGL

--

-- two descriptions provided

--------------------------------------

library ieee;

use ieee.std_logic_1164.all;

--------------------------------------

entity typecastU32_to_SGL_ent is

port(    u32: in std_logic_vector(31 downto 0);

    sgl: out std_logic_vector(31 downto 0)

);

end typecastU32_to_SGL_ent; 

---------------------------------------

architecture typecastU32_to_SGL_arch of typecastU32_to_SGL_ent is

begin

    process(u32)

    begin

        sgl <= u32;

    end process;

end typecastU32_to_SGL_arch;

architecture typecastU32_to_SGL_beh of typecastU32_to_SGL_ent is

begin

    sgl <= u32;

end typecastU32_to_SGL_beh;

---------------------------------------

Licence: Copyleft

Version: 1.0

LabVIEW FPGA 2012

Enjoy

Peter

[Craig_]

Did you try using the "To Single Precision Float" Conversion Function?

[JCC_(SK)]

Sorry, but I was interested in Type Cast not in Number conversion.

[Jon_Kokott]

Why does using this require compilation tools when I'm using cloud compile?

It would be nice if labview supported type casting for data types.

[T-REX$]

Hey Jon,

The NI LabVIEW FPGA Floating Point Library does provide a 'sgl to u32' and 'u32 to sgl' cast that should work without the local compilation tools being required. It can also be found in VI package manager.