How to store a negative fractional number to a memory or variable

[Praseetha]

Hi all
In vhdl coding, i have used sfixed(16 downto -12) type.
but while compiling it is shown that sfixed is not declared.
Can anyone plz help me to resolve this problem.

 

[K-J]

Hi all
In vhdl coding, i have used sfixed(16 downto -12) type.
but while compiling it is shown that sfixed is not declared.
Can anyone plz help me to resolve this problem.

You have to include the fixed point package with a 'use' statement, just like you would any other package.

 

[Praseetha]

Fixed point package in vhdl

Hi
i am using Actel libero 9.0.0.15 version. I have to use sfixed or ufixed types to represent some of my coefficients of filter like 0.0125, -0.125, 3.125 etc. But the problem is that while i am using this type error is showing while compiling the hdl file. the error shown is "sfixed is not declared". I used library ieee_proposed and the package fixed_pkg.
How can i resolve this issue. Please someone help me.
thanking You

 

[FvM]

Depending on the library configuration of your tool, it may be necessary to compile the packages explicitely into your project.