Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

how to write verilog coding for decimal value

Status
Not open for further replies.
siva_7517

siva_7517

Full Member level 2
Joined
Jan 16, 2006
Messages
138
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,296
Activity points
2,401
variable real verilog

Hi,

I am currently designing a fast fourier transform (FFT) chip. Meanwhile, I have across with decimal value while doing the calculation on FFT. Example :

x(1) = a - 0.707c + 0.707d

How can i represent the value 0.707 in verilog coding?

thanx
 

real variable verilog

real delta;//define a real variable
initial
begin
delta=707e-3; //delta assigned in scientific notation.
delta=0.707; //delat assigned a value 0.707
end
 

how to represent real values in verilog

i think you should transfer the decimal to binary.
x(1) = a - 0.707c + 0.707d
example if your define a reg [15:0] para to keep 0.707
0.707 =>65536*0.707 =46333.952=46334.
when you finished your compute , you can right shift 16 bit
 
  • Like
Reactions: dipin

    D

    dipin

    Points: 2
    Helpful Answer Positive Rating
verilog decimal

Hi,

But this coding below is non-synthesizeable. I think this coding is used for testbench.
Correct me if im wrong.

real delta;//define a real variable
initial
begin
delta=707e-3; //delta assigned in scientific notation.
delta=0.707; //delat assigned a value 0.707
end

Thanks
 

handling real values in verilog

you can use
1000*x(1) = 1000*a - 707c + 707d
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top