Question

I am trying to make a ROM in VHDL language, I am using this template I found on http://www.edaboard.com/thread38052.html :

library ieee;
use ieee.std_logic_1164.all;

entity ROM is
port ( address : in std_logic_vector(3 downto 0);
     data : out std_logic_vector(7 downto 0) );
end entity ROM;

architecture behavioral of ROM is
type mem is array ( 0 to 2**4 - 1) of std_logic_vector(7 downto 0);
constant my_Rom : mem := (
0  => "00000000",
1  => "00000001",
2  => "00000010",
3  => "00000011",
4  => "00000100",
5  => "11110000",
6  => "11110000",
7  => "11110000",
8  => "11110000",
9  => "11110000",
10 => "11110000",
11 => "11110000",
12 => "11110000",
13 => "11110000",
14 => "11110000",
15 => "11110000");
begin
process (address)
begin
 case address is
   when "0000" => data <= my_rom(0);
   when "0001" => data <= my_rom(1);
   when "0010" => data <= my_rom(2);
   when "0011" => data <= my_rom(3);
   when "0100" => data <= my_rom(4);
   when "0101" => data <= my_rom(5);
   when "0110" => data <= my_rom(6);
   when "0111" => data <= my_rom(7);
   when "1000" => data <= my_rom(8);
   when "1001" => data <= my_rom(9);
   when "1010" => data <= my_rom(10);
   when "1011" => data <= my_rom(11);
   when "1100" => data <= my_rom(12);
   when "1101" => data <= my_rom(13);
   when "1110" => data <= my_rom(14);
   when "1111" => data <= my_rom(15);
   when others => data <= "00000000";
 end case;
  end process;
  end architecture behavioral;

Well, the problem is that I want to put in my ROM 2000 values. So I was wondering how to make the next using python:

Imagine you have in a .txt file this data in the next format:

0  45
1  56
2  78
3  98

So the program would do this with the data:

0 => "00101101"
1 => "00111000"
2 => "01001110"
3 => "01100010"

Well these values “00101101”,”00111000″,”01001110″,”01100010″ are the respectives values for the binary representation of 45,56,78 y 89.
So, you get the idea…

There is a small detail, it is needed to specify the number of bits for the representation:
If you don´t you could get this:

0 => "101101"
1 => "111000"
2 => "1001110"
3 => "1100010"

Thank you so much to all possible pieces of code to do this program

Answer 1

for line in open('your_file.txt'):
    s = line.strip().split("  ") # two spaces are for split
    p = '{} => "{:0{min_bits}b}"'.format(s[0], int(s[1]), min_bits=10)
    print p