Ubuntu on Mac, yay :)

Now I have Ubuntu 10.04 Lucyd Lynx running on my Mac, and I can compile VHDL with GHDL and also use GTKWave. Yay! 🙂

Thanks to VirtualBox and the one who recommends it 🙂

Half-adder in VHDL

Yay. My first code in VHDL.

library ieee;
use ieee.std_logic_1164.all;

entity ha_CG is
Port ( X : in std_logic;
Y : in std_logic;
Sum : out std_logic;
Carry : out std_logic);
end ha_CG;

architecture Behavioral of ha_CG is
begin
Sum <= X xor Y;
Carry <= X and Y;
end Behavioral;


Happy enough to successfully compile it with GHDL and Wine.

GHDL is a compiler. It does not generate netlist.

Like has been said here:

Unlike some other simulators, GHDL is a compiler: it directly translates a VHDL file to machine code, using the GCC back-end and without using an intermediary language such as C or C++. Therefore, the compiled code should be faster and the analysis time should be shorter than with a compiler using an intermediary language.

Compiling VHDL with GHDL on Mac OS

1. Download GHDL for Mac OS download here
2. Put the whole directory in the home directory
3. Type a simple .vhdl code from here
   
   -- Hello world program.
   use std.textio.all; -- Imports the standard textio package.

   -- Defines a design entity, without any ports.
   entity hello_world is
   end hello_world;

   architecture behaviour of hello_world is
begin
process
variable l : line;
begin
write (l, String'("Hello world!"));
writeline (output, l);
wait;
end process;
end behaviour;


4. Compile the file:  wine ghdl.exe -a hello_world.vhdl
5. Build an executable file:  wine ghdl.exe -e hello_world
6. Run the code:  wine ghdl.exe -r hello_world or wine ./hello_world

Notes:

the working directory is : /Users/chika/.wine/drive_c/Program Files/Ghdl/bin

Installing Wine on Mac OS

I have to install Wine, because I want to use GHDL to compile VHDL.

Useful links:

1. http://davidbaumgold.com/tutorials/wine-mac/
2. http://wiki.winehq.org/MacOSX
3. http://wiki.winehq.org/MacOSX/Installing

But before installing Wine I had to installed Macports for Snow Leopard, downloaded from here.