在 VHDL 测试平台中读取文本文件

本文介绍了在 VHDL 测试平台中读取文本文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个文件 source.txt，它看起来像这样:

I have a file source.txt, it looks like this:

00660066006700670067006800680069006B006D006E
00660066006700670067006800680069006B006D006E
00660066006700670067006800680069006B006D006E
00660066006700670067006800680069006B006D006E
00660066006700670067006800680069006B006D006E
0065006500660067006700690069006A006B006C006E
00650065006600670067006700680069006A006C006D
00650065006600670067006600660068006A006B006D
006500650066006700670065006600670069006B006D
00650065006600670067006600670068006A006C006D
0065006500660067006700690069006A006B006C006E
*

每一行后面都有一个隐藏的换行符'\n'.星号*"是我可见的文件结尾字符.

After each line there is the hidden newline character '\n'.The asterix '*' is my visible end-of-file character.

我如何在 VHDL 中编写一个测试平台来执行以下操作:

How do I write a testbench in VHDL that does the following:

读取文件
在向量中存储一行
将该向量写入新的 target.txt

推荐答案

使用 VHDL-2008，并显示正在进行的 std_logic_vector，代码可以是:

Using VHDL-2008, and showing the std_logic_vector underway, the code can be:

library ieee;
use ieee.std_logic_1164.all;
use std.textio.all;

entity tb is
end entity;

architecture syn of tb is
begin
  process is
    variable line_v : line;
    file read_file : text;
    file write_file : text;
    variable slv_v : std_logic_vector(44 * 4 - 1 downto 0);
  begin
    file_open(read_file, "source.txt", read_mode);
    file_open(write_file, "target.txt", write_mode);
    while not endfile(read_file) loop
      readline(read_file, line_v);
      hread(line_v, slv_v);
      report "slv_v: " & to_hstring(slv_v);
      hwrite(line_v, slv_v);
      writeline(write_file, line_v);
    end loop;
    file_close(read_file);
    file_close(write_file);
    wait;
  end process;
end architecture;

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