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  • HDL Coder Generate Verilog and VHDL code for FPGA and ASIC designs HDL Coder generates portable, synthesizable Verilog and VHDL code from MATLAB functions, Simulink models, and Stateflow charts....
  • 1位全加器接口有:A被加数输入端,为加数输入端,C进位输入端,CO进位输出端,S和数输出端。1位全加器表达式如下:S=A xor B xor C, CO=(AB)+(AC)...本文用VHDL语言的GENERATE语句用四个一位全加器实现一个四位全加器。

    1位全加器

    在这里插入图片描述  1位全加器接口如上图所示,A为被加数输入端,B为加数输入端,C为进位输入端,CO为进位输出端,S为和数输出端。1位全加器表达式如下:S=ABCS =A \bigoplus B\bigoplus CCO=(AB)+(AC)+(BC)CO =(A \cdot B)+(A \cdot C)+(B \cdot C)
    1位全加器VHDL代码:

    --ADD1.vhd
    LIBRARY IEEE;
    USE IEEE.STD_LOGIC_1164.ALL;
    ENTITY ADD1 IS
    	PORT(
    		A,B,C: IN STD_LOGIC;
    		S: OUT STD_LOGIC;
    		CO:OUT STD_LOGIC
    	);
    END ADD1;
    ARCHITECTURE BHV OF ADD1 IS
    BEGIN
    	S <= A XOR B XOR C;
    	CO <= (A AND C)OR(B AND C)OR(A AND B);
    END BHV;
    

    4位全加器

      4位全加器是将低位的1位全加器的CO端接高位的1位全加器的C端,最低位的1位全加器的C端作为4位全加器的进位输入端,最高位的1位全加器的CO端作为1位全加器的进位输出端,4个1位全加器的A端和B端分别作为4位被加数和4位加数的输入端。4位全加器的RTL图如下图所示:
    在这里插入图片描述
    4位全加器VHDL代码:

    --ADD_N.vhd
    LIBRARY IEEE;
    USE IEEE.STD_LOGIC_1164.ALL;
    ENTITY ADD_N IS
    	GENERIC(N : INTEGER:=4);--改这个N的值可以实现其他位数的全加器
    	PORT(
    		A,B: IN STD_LOGIC_VECTOR(N-1 DOWNTO 0);
    		CI: IN STD_LOGIC;
    		S: OUT STD_LOGIC_VECTOR(N-1 DOWNTO 0);
    		CO: OUT STD_LOGIC
    	);
    END ADD_N;
    ARCHITECTURE RTL OF ADD_N IS
    	COMPONENT ADD1
    	PORT(
    		A,B,C: IN STD_LOGIC;
    		S: OUT STD_LOGIC;
    		CO:OUT STD_LOGIC
    	);
    	END COMPONENT;
    	SIGNAL TEMP: STD_LOGIC_VECTOR(N DOWNTO 0);
    BEGIN
    	TEMP(0) <= CI;
    	CO <= TEMP(N);
    	G: FOR I IN 0 TO N-1 GENERATE
    			U: ADD1 PORT MAP(A=>A(I),B=>B(I),C=>TEMP(I),S=>S(I),CO=>TEMP(I+1));
    		END GENERATE;
    END RTL;
    

    功能仿真波形:
    在这里插入图片描述

    展开全文
  • <div><p>VHDL file with a process in if-generate clause is not correctly parsed. <pre><code> Count_2 : if Counters_g = true generate --! diagram Test2b : process(Clock_in, ResetRx_in) --...
  • m using VHDL 2008, according to the standard the keyword <code>generate</code> is required. So we can't do <code>end ShiftStages</code> for example. Unless I'm misreading or misunderstanding ...
  • 【FPGA学习笔记】VHDL:GENERATE语句

    千次阅读 2020-03-23 18:12:06
    generate 是一种可以**建立重复结构**或者是**在多个模块的表示形式之间进行选择**的语句。由于生成语句**可以用来产生多个相同的结构**,因此使用生成语句就可以**避免多段相同结构的VHDL程序的重复书写。**

    generate语句

    是一种可以建立重复结构或者是在多个模块的表示形式之间进行选择的语句。由于生成语句可以用来产生多个相同的结构,因此使用生成语句就可以避免多段相同结构的VHDL程序的重复书写。
    有两种用途:
    1、生成相同的元件,多次例化

    --异步加法计数器
    LIBRARY IEEE;
    USE IEEE.STD_LOGIC_1164.ALL;
    
    ENTITY DFFR IS                       --定义一个D触发器DFFR
    	PORT(clk , clr, d : IN STD_LOGIC;
    		Q ,BQ : OUT STD_LOGIC);
    END DFFR;
    ARCHITECTURE art OF DFFR IS
    	SIGNAL Q_IN :STD_LOGIC;
    BEGIN
    	Q <= Q_IN;
    	BQ <= NOT Q_IN;
    	PROCESS(clk,clr)
    	BEGIN
    		IF (clr = '1')THEN
    			Q_IN <= '0';
    		ELSIF (clk'EVENT AND clK = '1')
    			Q_IN <= d;
    		END IF;
    	END PROCESS;
    END art;
    
    ENTITY rplcounter IS
    	PORT(clK,clr : IN STD_LOGIC;
    		count :OUT STD_LOGIC_VECTOR(7 DOWNTO 0));
    END rplcounter;
    ARCHITECTURE art1 OF DFFR IS
    	SIGNAL COUNT_IN : STD_LOGIC_VECTOR(7 DOWNTO 0);
    	COMPONENT DFFR                        --说明元件
    		PORT(clk , clr, d : IN STD_LOGIC;
    		Q ,BQ : OUT STD_LOGIC);
    	END COMPONENT;
    BEGIN
    	COUNT_IN(0) <= clK;
    	GEN1: FOR i IN 0 TO 3 GENERATE--元件例化并定义引脚连接:低位触发器的输出作为下一级的时钟信号
    		U:DFFR PORT MAP
    		(clK => COUNT_IN(i);
    		 clr => clr;
    		 d => COUNT_IN(i+1);
    		 Q => COUNT_IN(i);
    		 BQ => COUNT_IN(i+1));
    	END GENERATE;
    END art1;
    

    2、生成结构相同的多次赋值、组合逻辑;

    FOR i IN 0 TO 99 GENERATE
    
    a(i)<=b(i)+c(i);
    
    END GENERATE;
    
    展开全文
  • VHDL_BaseGrammer

    2021-02-23 09:34:11
    VHDL_BaseGrammer 百度文库 ...VHDL基础——阿傥的博客csdn ...VHDL 中Others 的用法 ...VHDL generate 语句使用 VHDL 属性语句之attribute 请问在VHDL里将一个信号置为open是什么意思? FOR...

     

    VHDL_BaseGrammer 百度文库

     

     

     

     

     

     

     

     

     

     

    VHDL基础——阿傥的博客csdn

     

    TYPE 数据类型 

    VHDL 中Others 的用法

     

    VHDL  event  属性 

     

     

     

    VHDL generate 语句使用

    VHDL 属性语句之attribute 

    请问在VHDL里将一个信号置为open是什么意思?

    FOR LOOP 语句

     

     

    vhdl  reverse_range

     

    VHDL中assert是什么

    VHDL断言语句与报告语句

     

     

    展开全文
  • <div><p>该提问来源于开源项目:geany/geany</p></div>
  • ISE for VHDL

    2011-04-12 02:08:00
    1. generate testbench   <br />Project --> New Source Select VHDL TestBench Associate it with your top level module    

    1. generate testbench

     

    Project --> New Source

    Select VHDL TestBench

    Associate it with your top level module

     

     

    展开全文
  • vhdl按键消抖

    2013-05-10 19:35:15
    关于vhdl的消抖程序, library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_arith.all; use ieee.std_logic_unsigned.all; entity shift is port(sin,cp:in std_logic;f:out std_logic); end shift; ...
  • VHDL 入门 01编程步骤

    2020-09-26 22:40:49
    VHDL Language Structural Modeling Step1 Generate top-level entity declaration entity my_compare is port( A_IN : in std_logic_vector(2 downto 0) ; B_IN : in std_logic_vector(2 downto 0) ; EQ_OUT : ...
  • VHDL保留字(Reserved Words)

    千次阅读 2017-02-24 16:32:20
    VHDL保留字(Reserved Words) abs 取绝对值 case 分支语句 generate 生成 map 映射 package 包 select 选择 unaffected 无影响 access 访问类型 component 元件 gene
  • HDL coder帮助文档的解读 ...Generate VHDL and Verilogcode for FPGA and ASIC designs HDL Coder™ generates portable, synthesizable VHDL® andVerilog® code from MATLAB® functions,Simulink® models,
  • VHDL.............................................................................................................................................................7 1.5 Synthesis.........................
  • verilong generate语句用法

    千次阅读 2016-02-19 15:21:24
    Verilog-2001之generate...而在Verilog-2001里,新增加的generate语句拓展了这种用法(其思想来源于VHDL语言)。除了允许复制产生primitive和module的多个实例化,同时也可以复制产生多个net、reg、parameter、assign、
  • VHDL N位 除法器

    2011-09-21 00:20:34
    已调试通过 修改GENERATE 就可以实现N位除法
  • If a constant value is given as an argument that is then assigned to a signal in an enclosed process, conversion to VHDL will generate a VHDL constant for that variable. If this function is recursive,...
  • <div><p>As you know it would be hard to convert people from Verilog or VHDL (talking about companies) but using Python to formal verify existing VHDL and Verilog codes would be awesome. I've used ...
  • 基于VHDL语言的CPU设计

    2009-04-11 15:44:26
    This CPU has basic instruction set, and we will utilize its instruction set to generate a very simple program to verify its performance. At least four parts constitute a simple CPU: the control unit,...
  • I really liked so far, but I just discovered a strange (and a little bit scary) bug with the VHDL conversion when tried to generate a simple RAM. <p>For make things easier I copied the code from the...
  • <p>I know I can directly use your project at ISE or Vivado(riscv_vhdl/rocket_soc/prj/) but I want to synthesis in vivado by myself at xilinx VCU118 Board. Can you tell me which vhdl files need to add ...
  • 1.4 VHDL.............................................................................................................................................................7 1.5 Synthesis......................
  • EE323 DSD Project Report Introduction: In this project, we review ...Then we use MATLAB to generate the filter coefficients and convert them into binary. We use some added sin wave with different frequ
  • vhdl COCOTB_LOG_LEVEL=DEBUG COCOTB_SCHEDULER_DEBUG=1 all </code></pre> <p>I am getting the following output: <pre><code> 0.00ns DEBUG cocotb.regression regression.py:555 in generate_tests ...
  • http://www.stack.nl/~dimitri/... Doxygen is a documentation system for C++, C, Java, Objective-C, Python, IDL (Corba and Microsoft flavors), Fortran, VHDL, PHP, C#, and to some extent D. It can...
  • <p>When I try to generate the HDL, I get a pretty generic error: 'Error during export to VHDL.' I have narrowed it down to having any output connected to a pin control through a splitter. The ...
  • -- Generate serial clock (max 20MHz) ---------------------------------------------------------------------------------------------------- process (clk) -- Divide by 2^4 = 16, CLKmax = 16 x 20MHz...

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