Can you recommend a website for vhdl source codes?

Question

I want a VHDL source codes website that provide a ready to use component source code.

for example: full adder vhdl source code.

Answer 1

Check out opencores.org.

Answer 2

Also, you can check out http://www.freemodelfoundry.com/ for VHDL and Verilog modules.

Just for the full adder I can write it right here ;)

entity full_adder is
    port(
        a, b, cin: in BIT;
        sum, cout: out BIT);
end full_adder;

architecture gate_level of full_adder is
begin
    sum <= (a xor b) xor cin;
    cout <= ((a and b) or (a and cin)) or (b and cin);
end gate_level;

UPDATE: such tool as Aldec Active-HDL has IP-Core generator. You can select different cores, input parameters and get ready-to-use VHDL or Verilog component. Aldec provides student licenses for free. Check out http://www.aldec.com/Company/University.aspx

Answer 3

As David says, opencores.org is a good starting point. Another interesting project is the LEON3 processor and its related Gaisler library, available as open-source project from http://www.gaisler.com

Philippe