storing .txt file in an array..

[chat]

hi all !
i have made a part of a program to read a text file from a specified location , and i want to store it an array .. i don't know how to do this...please help me..

here is the code for reading a file..

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.std_logic_textio.all;

Port ( adr: in std_logic_vector(7 downto 0);
data : out std_logic_vector(11 downto 0);
clk: in std_logic);
end rom;

architecture Behavioral of rom is
	file datafile: text is "c:\read.txt";
	type memorytype is array(0 to 255) of std_logic_vector(11 downto 0);
	signal rom: memorytype;
	signal integer_address: integer range 0 to 255;

begin
	clkedge: process(clk)
		begin
			if rising_edge(clk) then
				integer_address <= to_integer(adr);
			end if;
	end process clkedge;

end Behavioral;

 

[TrickyDicky]

first of all it depends how the data is stored in the text file. Is it binary or hex or integer?

 

[chat]

its in bit form like

0001
0011
0111
.....etc.

 

[TrickyDicky]

to read a text file, you need to use the textio library:

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_textio.all;

use std.textio.all;

.......

process
  file datafile : text open READ_MODE is "c:\read.txt";
  variable inline : line;
begin
  
  for i in memorytype'range loop
    readline(datafile, inline);
    read(inline, (memorytype(i));
  end loop;
end process;

This code assumes there are 12 bits on each line to fill each std_logic_vector.

 

[chat]

hi tricky this program runs fine but i want to use an array...

 

[TrickyDicky]

This is reading the text file directly into your array.

 

[chat]

ok.. what will be the modifications in writing ?