LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; USE IEEE.STD_LOGIC_ARITH.ALL; ENTITY tong IS PORT( Vin : IN STD_LOGIC_VECTOR(7 DOWNTO 0); shift : IN STD_LOGIC_VECTOR(2 downto 0); Vo : OUT STD_LOGIC_VECTOR(7 DOWNTO 0) ); END tong; ARCHITECTURE behavior OF tong IS BEGIN process(shift,Vin) VARIABLE temp1:STD_LOGIC_VECTOR(7 DOWNTO 0); VARIABLE temp2:STD_LOGIC_VECTOR(7 DOWNTO 0); VARIABLE temp3:STD_LOGIC_VECTOR(7 DOWNTO 0); begin -- 第一级移位操作 IF(shift(0)='0') THEN temp1 := Vin; ELSE temp1(0):='0'; for i IN 1 to Vin'HIGH LOOP temp1(i):=Vin(i-1); END LOOP; END IF; -- 第二级移位操作 IF(shift(1)='0') THEN temp2:=temp1; ELSE temp2(0 to 1):="00"; -- 清零前两位 for i IN 2 to Vin'HIGH LOOP temp2(i):=temp1(i-2); END LOOP; END IF; -- 第三级移位操作 IF(shift(2)='0') THEN temp3:=temp2; ELSE temp3(0 to 2):="000"; -- 清零前三位 for i IN 3 to Vin'HIGH LOOP temp3(i):=temp2(i-3); END LOOP; END IF; Vo<=temp3; -- 输出结果 end process; END behavior;将这个代码改成右移的桶式移位寄存器VHDL版

library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL entity display is port( clock: in std_logic; reset: in std_logic; input: in std_logic_vector(3 downto 0); output: out std_logic_vector(7 downto 0) ); end display;检验这个代码的正确性

- clock: 输入时钟信号，类型为 std_logic - reset: 输入复位信号，类型为 std_logic - input: 输入数据信号，类型为长度为 4 的 std_logic_vector 向量 - output: 输出数据信号，类型为长度为 8 的 std_logic_...

library ieee; use ieee.std_logic_1164.all; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; entity key is PORT ( clk : IN STD_LOGIC; keyin : in STD_LOGIC; keyout : OUT STD_LOGIC) ; end key ; ARCHITECTURE behav OF key IS signal cnt: std_logic_vector(31 downto 0); signal key_scan:std_logic; signal key_scan_r:std_logic; BEGIN keyout <= key_scan_r and (not key_scan); PROCESS(clk)BEGIN if(clk'event AND clk='1')then if(cnt = x"000F423F")then --20ms cnt <= (others => '0'); key_scan <= keyin; else cnt <= cnt + '1'; key_scan <= key_scan; end if; key_scan_r <= key_scan; end if; END PROCESS ; END behav;

这是一个 VHDL 代码段，描述了一个键盘扫描的模块。它包含一个输入时钟信号 clk，一个输入键盘扫描...需要注意的是，这段代码中使用了 STD_LOGIC_ARITH 和 STD_LOGIC_UNSIGNED 两个库来支持算术运算和无符号逻辑运算。

LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY con_out IS PORT ( OE: IN STD_LOGIC; A: IN STD_LOGIC_VECTOR(7 DOWNTO 0); Y: OUT STD_LOGIC_VECTOR(7 DOWNTO 0)); END ENTITY con_out; ARCHITECTURE behav OF con_out IS BEGIN PROCESS ( OE,A ) BEGIN IF OE='0' THEN Y<=A; ELSE Y<="ZZZZZZZZ"; END IF; END PROCESS; END ARCHITECTURE behav;

这段代码定义了一个名为 con_out 的...在这个实体中使用了两个 IEEE 标准的库，IEEE.STD_LOGIC_1164.ALL 和 IEEE.STD_LOGIC_UNSIGNED.ALL。这些库中包含了许多常用的数据类型和操作符，可以方便地进行逻辑设计。

library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity divide_25 is port(clk_in : in std_logic; clk_out : out std_logic); end; architecture fenpin of divide_25 is signal cnt :integer range 0 to 24; signal clk_tmp : std_logic; begin process(clk_in) begin if(clk_in'event and clk_in='1')then if cnt=24 then cnt<=0; clk_tmp<=not clk_tmp; else cnt<=cnt+1; end if; end if; end process; clk_out<=clk_tmp; end;翻译

代码中使用了IEEE标准库中的std_logic_1164和std_logic_unsigned库。在architecture部分，定义了一个计数器cnt，范围为0到24，用来计数分频比。同时，定义了一个辅助时钟信号clk_tmp，用来生成分频后的时钟信号。在...

解释代码：LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY lockcontrol IS PORT( FEEDBACK,RESET:IN STD_LOGIC; Y:OUT STD_LOGIC); END lockcontrol; ARCHITECTURE bhv OF lockcontrol IS BEGIN PROCESS(FEEDBACK,RESET) BEGIN Y <= '1'; IF FEEDBACK = '0' THEN Y <= '0'; END IF; IF RESET = '1' THEN Y <= '1'; END IF; END PROCESS; END bhv;

这是一个简单的锁控制电路的VHDL代码，它的功能是控制一个输出信号Y来...该代码中使用了VHDL标准库中的两个包：IEEE.STD_LOGIC_1164.ALL和IEEE.STD_LOGIC_UNSIGNED.ALL，这两个包分别定义了标准逻辑类型和无符号类型。

library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity cnt4 is port(clk : in std_logic; q : buffer std_logic_vector(3 downto 0)); end cnt4; architecture behave of cnt4 is begin process(clk) begin if clk'event and clk = '1' then if q = 15 then q <= "0000"; else q <= q+1; end if; end if; end process; end behave;解释一下这个vhdl代码

这段代码实现了一个4位计数器（cnt4），其中包括一个时钟输入（clk）和一个4位输出（q）。在行为架构（behave）中，定义了一个进程（process）来响应时钟的上升沿事件（clk'event and clk = '1'），也就是时钟信号...

library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity SaveNum IS port(d:in std_logic_vector(7 downto 0 ); OE,CLK:in std_logic; q:buffer std_logic_vector(7 downto 0 ) ); end SaveNum; architecture Spro of SaveNum is begin process(CLK,OE) begin if(OE='0') then if(rising_edge(CLK)) then q<=d; else q<=q; end if; else q<="11111111"; end if; end process; process(d) begin end process; end Spro; 解释一下这个vhdl代码

这是一个 VHDL 实体和体系结构描述的例子，名称为 SaveNum。该实体包含四个端口：d、OE、CLK 和 q，其中 d 是 8 位输入数据，OE 和 CLK 作为控制信号输入，q 作为8位双向缓冲器输出。实体的行为是在一个由 CLK 和 ...

补全以下代码 LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY con_cnt IS PORT ( CLK : IN STD_LOGIC; AIN,BIN,CIN,DIN : IN STD_LOGIC; Q: OUT STD_LOGIC_VECTOR (7 DOWNTO 0)); END ENTITY con_cnt; ARCHITECTURE behav OF con_cnt IS COMPONENT con_en PORT ( --补充 ); END COMPONENT ; COMPONENT con_out PORT ( --补充 ); END COMPONENT ; SIGNAL EN : STD_LOGIC; SIGNAL R: STD_LOGIC_VECTOR(7 DOWNTO 0); BEGIN u1 : con_en PORT MAP ( ); --例化 u2 : con_out PORT MAP ( ); --例化 PROCESS ( CLK,EN ) BEGIN --补充计数器程序 END PROCESS; END ARCHITECTURE behav;

USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY con_cnt IS PORT ( CLK : IN STD_LOGIC; AIN, BIN, CIN, DIN : IN STD_LOGIC; Q: OUT STD_LOGIC_VECTOR (7 DOWNTO 0) ); END ENTITY ...

这是我写的UART的VHDL文件：library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_arith.all; use ieee.std_logic_unsigned.all; entity my_uart is port(clk_in:in std_logic; rx:in std_logic; tx:out std_logic; tcmd:in std_logic; tx_done:out std_logic; rx_ready:out std_logic; t_data:in std_logic_vector(7 downto 0); r_data:out std_logic_vector(7 downto 0)); end my_uart; architecture beheavior of my_uart is component baud is port(clk:in std_logic; bclk:out std_logic); end component; component rxd is port(bclk_in,rxd_in:in std_logic; rx_ready:out std_logic; rx_buffer:out std_logic_vector(7 downto 0)); end component; component txd is port(bclk_in:in std_logic; tx_cmd:in std_logic; txd_out:out std_logic; txd_done:out std_logic; tx_buffer:in std_logic_vector(7 downto 0)); end component; signal baud_clk:std_logic; begin B:baud port map(clk_in,baud_clk); R:rxd port map(baud_clk,rx,rx_ready,r_data); T:txd port map(baud_clk,tcmd,tx,tx_done,t_data); end beheavior;帮我写一个test benche文件，基于Modelsim进行仿真，以验证它的接受与发射功能

use ieee.std_logic_1164.all; entity tb_my_uart is end tb_my_uart; architecture behavior of tb_my_uart is -- Component declaration for DUT component my_uart is port( clk_in : in std_logic; rx : ...

LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY counter1 IS PORT(clr,en,clk: IN STD_LOGIC; Q : OUT STD_LOGIC_VECTOR(4 DOWNTO 0)); END counter1; ARCHITECTURE count OF counter1 IS SIGNAL count: STD_LOGIC_VECTOR(3 DOWNTO 0); BEGIN PROCESS(clk,clr) BEGIN IF(clr='1') THEN count<=(others=>'0'); ELSIF(rising_edge(clk)) THEN IF(en='1') THEN IF(count="1011") THEN count="0000"; ELSE count=count+'1'; END IF; END IF; END PROCESS; Q<=count; END counter1;找出里面的错误并更改

USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY counter1 IS PORT( clr, en, clk: IN STD_LOGIC; Q: OUT STD_LOGIC_VECTOR(4 DOWNTO 0) ); END counter1; ARCHITECTURE count OF ...

library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.NUMERIC_STD.ALL; entity jsq is Port ( clk : in STD_LOGIC; rst : in STD_LOGIC; count : out STD_LOGIC_VECTOR (3 downto 0)); end jsq; architecture Behavioral of jsq is signal cnt : integer range 0 to 15 := 0; begin process(clk) begin if rising_edge(clk) then if rst = '1' then cnt <= 0; elsif cnt = 15 then cnt <= 0; else cnt <= cnt + 1; end if; end if; end process; count <= std_logic_vector(to_unsigned(cnt, 4)); end Behavioral;详细一条一条解释

use IEEE.NUMERIC_STD.ALL; 这三行代码引用了VHDL的标准库和数字库，以便在代码中使用标准逻辑类型和数字类型。 2. entity jsq is Port ( clk : in STD_LOGIC; rst : in STD_LOGIC; count : out STD_LOGIC_...

library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity pipo is port ( dcc1: in std_logic_vector(4 downto 1); clk : in std_logic; data_out:out std_logic_vector(3 downto 0)); end pipo; architecture pipo of pipo1 is signal dc0,dc1,dc2,dc3:std_logic_vector(3 downto 0); begin process(clk,clr) begin if(clr='0') then dc0<="0000"; dc1<="0000"; dc2<="0000"; dc3<="0000"; data_out<="0000"; elsif(clk'event and clk='1') then dc0<=dcc1; dc1<=dc0; dc2<=dc1; dc3<=dc2; end process ; end pipo；

这段代码是一个 VHDL 代码，描述了一个基本的 4 位向右移位寄存器（PIPO，即“Parallel-In Parallel-Out”）。它包含一个 4 位的输入...这段代码中使用了 IEEE 标准库，包括 std_logic_1164 和 std_logic_unsigned。

解释这段代码：LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY codeset IS PORT(ENABLE:IN STD_LOGIC; PASSWORD:IN STD_LOGIC_VECTOR(7 DOWNTO 0); Q:OUT STD_LOGIC_VECTOR(7 DOWNTO 0)); END codeset; ARCHITECTURE bhv OF codeset IS BEGIN PROCESS(ENABLE,PASSWORD) BEGIN IF ENABLE = '1' THEN Q(7) <= PASSWORD(7); Q(6) <= PASSWORD(6); Q(5) <= PASSWORD(5); Q(4) <= PASSWORD(4); Q(3) <= '0'; Q(2) <= '0'; Q(1) <= '0'; Q(0) <= '0'; END IF; END PROCESS; END bhv;

该电路包含一个输入端口 ENABLE 和 PASSWORD，以及一个输出端口 Q。当 ENABLE 为高电平时，该电路会将 PASSWORD 的高四位复制到 Q 的高四位，同时将 Q 的低四位设置为 0。具体来说，Q(7) 对应 PASSWORD 的最高位，Q...

library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; use ieee.std_logic_arith.all; -- 50Mhz -- 任意Hz分频器 entity divide is generic ( n:integer:=10; --n分频 m:integer:=3 --高电平 ); port ( clkin:in std_logic; --时钟输入 clkout: out std_logic --时钟输出 ); end divide; -- ************************************************************* architecture fenpin of divide is signal count:integer range 0 to n-1; -- 计数值 begin process(clkin) begin if(clkin' event and clkin= '1')then if(count<n-1) then count<=count+1; else count<=0; end if; end if; end process; clkout<='1' when count<m else '0'; end fenpin;分析代码

这段代码是一个任意频率分频器的 VHDL 实现。...需要注意的是，这段代码中使用了 std_logic_1164、std_logic_unsigned 和 std_logic_arith 这三个库，分别用于定义信号类型、无符号算术运算和有符号算术运算。

给以下vhdl代码添加注释：library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; use ieee.std_logic_arith.all; entity adder_4bit is port ( ain1,bin1,cin1,ain2,bin2,ain3,bin3,ain4,bin4:in std_logic; so1,so2,so3,so4,co5:out std_logic ); end adder_4bit; architecture hav of adder_4bit is component adder_1bit port (bin: IN STD_LOGIC; cin: IN STD_LOGIC; ain: IN STD_LOGIC; so :OUT STD_LOGIC; co :OUT STD_LOGIC); end component; signal cin2,cin3,cin4,cin5:std_logic; begin u1:adder_1bit port map(ain=>ain1,bin=>bin1,cin=>cin1,co=>cin2,so=>so1); u2:adder_1bit port map(ain=>ain2,bin=>bin2,cin=>cin2,co=>cin3,so=>so2); u3:adder_1bit port map(ain=>ain3,bin=>bin3,cin=>cin3,co=>cin4,so=>so3); u4:adder_1bit port map(ain=>ain4,bin=>bin4,cin=>cin4,co=>cin5,so=>so4); end architecture;

-- This is a VHDL code for a 4-bit adder -- The code defines an entity named "adder_4bit" with 9 input ports and 5 output ports -- The entity uses 4 instances of a component named "adder_1bit" to ...

LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; use ieee.std_logic_arith.all; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY YMQ IS PORT(AIN4 : IN STD_LOGIC_VECTOR(3 DOWNTO 0); DOUT7 :OUT STD_LOGIC_VECTOR(6 DOWNTO 0)); END YMQ; ARCHITECTURE ART OF YMQ IS BEGIN PROCESS(AIN4) BEGIN CASE AIN4 IS WHEN "0000"=>DOUT7<="1111110"; WHEN "0001"=>DOUT7<="0110000"; WHEN "0010"=>D0UT7<="1101101"; WHEN "0011"=>DOUT7<="1111001"; WHEN "0100"=>D0UT7<="0110011"; WHEN "0101"=>DOUT7<="1011011"; WHEN "0110"=>DOUT7<="1011111"; WHEN "0111"=>D0UT7<="1110000"; WHEN "1000"=>DOUT7<="1111111"; WHEN "1001"=>DOUT7<="1111011"; WHEN OTHERS=>DOUT7<="0000000"; END CASE; END PROCESS; END ART;

USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_ARITH.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY YMQ IS PORT(AIN4 : IN STD_LOGIC_VECTOR(3 DOWNTO 0); DOUT7 : OUT STD_LOGIC_VECTOR(6 DOWNTO 0)); ...

修正以下代码LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY kkjsq IS PORT ( CLK : IN STD_LOGIC; AIN,BIN,CIN,DIN : IN STD_LOGIC; Q: OUT STD_LOGIC_VECTOR (7 DOWNTO 0)); END ENTITY kkjsq; ARCHITECTURE behav OF kkjsq IS COMPONENT con_en PORT ( EN : IN STD_LOGIC; Q : OUT STD_LOGIC_VECTOR(7 DOWNTO 0) --补充 ); END COMPONENT ; COMPONENT kkjsq2 PORT ( D : IN STD_LOGIC_VECTOR(7 DOWNTO 0); CLK : IN STD_LOGIC; Q : OUT STD_LOGIC_VECTOR(7 DOWNTO 0) --补充 ); END COMPONENT ; SIGNAL EN : STD_LOGIC; SIGNAL R: STD_LOGIC_VECTOR(7 DOWNTO 0); BEGIN u1 : con_en PORT MAP ( EN => EN, Q => R ); --例化 u2 : kkjsq2 PORT MAP ( D => R, CLK => CLK, Q => Q ); --例化 PROCESS ( CLK,EN ) BEGIN --补充计数器程序 IF (EN = '1') THEN R <= R + 1; END IF; END PROCESS; END ARCHITECTURE behav;

USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; ENTITY kkjsq IS PORT ( CLK : IN STD_LOGIC; AIN,BIN,CIN,DIN : IN STD_LOGIC; Q: OUT STD_LOGIC_VECTOR (7 DOWNTO 0) ); END ENTITY kkjsq;...

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library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL entity display is port( clock: in std_logic; reset: in std_logic; input: in std_logic_vector(3 downto 0); output: out std_logic_vector(7 downto 0) ); end display;检验这个代码的正确性

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