南山网站多少钱,企业免费招聘人才网站,如何做网站模特,wordpress主题免费中文版使用FPGA进行图像处理时#xff0c;通常需要将TXT文件中的图像数据读出到TestBench中#xff0c;并将仿真的结果写入到TXT文件中#xff0c;用于确认图像处理的结果是否正确。
VHDL中TXT文件的读写操作如下所示#xff0c;
--------------------------------------------…使用FPGA进行图像处理时通常需要将TXT文件中的图像数据读出到TestBench中并将仿真的结果写入到TXT文件中用于确认图像处理的结果是否正确。
VHDL中TXT文件的读写操作如下所示
----------------------------------------------------------------------------------
-- Company:
-- Engineer:
--
-- Create Date: 2025/04/18 21:34:38
-- Design Name:
-- Module Name: tb_txt_rdwr - Behavioral
-- Project Name:
-- Target Devices:
-- Tool Versions:
-- Description:
--
-- Dependencies:
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
----------------------------------------------------------------------------------library IEEE;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
use ieee.std_logic_textio.all;
use std.textio.all;-- testio程序包是std库的一部分-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--use IEEE.NUMERIC_STD.ALL;-- Uncomment the following library declaration if instantiating
-- any Xilinx leaf cells in this code.
--library UNISIM;
--use UNISIM.VComponents.all;entity tb_txt_rdwr is
-- Port ( );
end tb_txt_rdwr;architecture Behavioral of tb_txt_rdwr isconstant clk_period : time : 10 ns; signal clk : std_logic;
signal rst : std_logic;signal wrdata : std_logic_vector(3 downto 0);
signal wren : std_logic;
signal wrdone : std_logic;signal rddata : std_logic_vector(3 downto 0);
signal rden : std_logic;
signal rddone : std_logic;begin-----------------------------------
--生成时钟复位信号
process
beginclk 0; wait for clk_period/2;clk 1; wait for clk_period/2;
end process;process
beginrst 1;wait for clk_period*200;rst 0;wait ;
end process;-----------------------------------
--生成要写入TXT文件中的二进制数据
process
beginwrdata (others0);wren 0;wrdone 0;wait until falling_edge(rst);wait until rising_edge(clk);wait until rising_edge(clk);wait until rising_edge(clk);for i in 15 downto 0 loop wren 1;wait until rising_edge(clk);wrdata wrdata x1;end loop;wren 0; wait until rising_edge(clk);wait until rising_edge(clk);wait until rising_edge(clk); wrdone 1;wait until rising_edge(clk);wrdone 0;wait ;
end process;-----------------------------------
--写数据到TXT文件中
process(clk,rst)file v_file : text;variable v_line : line;variable v_data : std_logic_vector(3 downto 0);
beginif rst1 thenfile_open(v_file,E:\forsim\txt_from_vhdl_tb.txt,write_mode);elsif rising_edge(clk) thenif wren1 thenv_data : wrdata;write(v_line,v_data);writeline(v_file,v_line);elsif wrdone1 thenfile_close(v_file);end if;end if;
end process;-----------------------------------
--生成TXT文件的读使能信号和读结束信号
process
beginrden 0;rddone 0;wait until falling_edge(wrdone); --检测到TXT文件写操作结束后从TXT文件中读出写入的数据wait until rising_edge(clk);wait until rising_edge(clk);wait until rising_edge(clk);for i in 15 downto 0 loop rden 1;wait until rising_edge(clk);end loop;rden 0;wait until rising_edge(clk);wait until rising_edge(clk);wait until rising_edge(clk);rddone 1;wait until rising_edge(clk);rddone 0;wait ;
end process;-----------------------------------
--从TXT文件中读出数据并赋值到rdtata
process(clk,rst)file v_file : text;variable v_line : line;variable v_data : std_logic_vector(3 downto 0);
beginif rst1 thenfile_open(v_file,E:\forsim\txt_from_vhdl_tb.txt,read_mode);rddata (others0);elsif rising_edge(clk) thenif rden1 thenreadline(v_file,v_line);read(v_line,v_data);rddata v_data;elsif rddone1 thenfile_close(v_file);end if;end if;
end process;end Behavioral;
