logic 【7:0】 data_out【1:0】
时间: 2024-01-11 15:37:58 浏览: 134
这段代码定义了一个二维数组`data_out`,其中每个元素都是一个8位的逻辑类型`logic [7:0]`。该数组有2个维度,第一个维度的范围是1到0,第二个维度的范围是7到0。这意味着`data_out`数组有2行8列,每个元素的位宽为8位。注意,`logic`是SystemVerilog中的一种数据类型,如果你在使用Verilog,需要使用`wire`或`reg`代替`logic`。
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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
好的,以下是一个简单的 test bench 文件,可以用于验证你的 UART 模块的接收与发送功能。请将该代码保存为 tb_my_uart.vhd 文件,与你的 my_uart.vhd 文件一起在 ModelSim 中进行仿真。
```
library ieee;
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 : 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 component;
-- Inputs
signal clk_in : std_logic := '0';
signal rx : std_logic := '0';
signal tcmd : std_logic := '0';
signal t_data : std_logic_vector(7 downto 0) := (others => '0');
-- Outputs
signal tx : std_logic;
signal tx_done : std_logic;
signal rx_ready : std_logic;
signal r_data : std_logic_vector(7 downto 0);
-- Clock period definitions
constant clk_period : time := 10 ns;
begin
-- Instantiate the DUT
uut: my_uart port map (
clk_in => clk_in,
rx => rx,
tx => tx,
tcmd => tcmd,
tx_done => tx_done,
rx_ready => rx_ready,
t_data => t_data,
r_data => r_data
);
-- Clock process definitions
clk_process :process
begin
clk_in <= '0';
wait for clk_period/2;
clk_in <= '1';
wait for clk_period/2;
end process;
-- Stimulus process
stim_proc: process
begin
-- Send a test character
t_data <= "01010101";
tcmd <= '1';
wait for 500 ns;
tcmd <= '0';
wait for 1000 ns;
-- Send another test character
t_data <= "10101010";
tcmd <= '1';
wait for 500 ns;
tcmd <= '0';
wait for 1000 ns;
-- Wait for a received character
wait until rx_ready = '1';
assert r_data = "11110000" report "Received incorrect data" severity error;
wait;
end process;
end behavior;
```
请注意,该 test bench 只是一个简单的示例,可能需要根据你的具体需求进行修改。在仿真过程中,你可以观察模拟波形,以验证你的 UART 模块是否正常工作。
用vhdl语言写一个uart的传输程序,其中具体框架为library IEEE; use IEEE.STD_LOGIC_1164.ALL; entity UART_TX is port ( Clk : in std_logic; Reset : in std_logic; Go : in std_logic; Data : in std_logic_vector(7 downto 0); Tick : in std_logic; Tx : out std_logic ); end entity; architecture RTL of UART_TX is begin end architecture;
好的,我会尽力回答您的问题。不过,对于您提出的这个问题,需要详细的代码实现才能给出具体的答案。以下是一个简单的UART TX代码实现,您可以参考一下:
```vhdl
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity UART_TX is
port (
Clk : in std_logic;
Reset : in std_logic;
Go : in std_logic;
Data : in std_logic_vector(7 downto 0);
Tick : in std_logic;
Tx : out std_logic
);
end entity;
architecture RTL of UART_TX is
signal Count : integer range 0 to 11 := 0;
signal Shift : std_logic_vector(10 downto 0) := (others => '0');
begin
process (Clk, Reset)
begin
if Reset = '1' then
Count <= 0;
Shift <= (others => '0');
Tx <= '1';
elsif rising_edge(Clk) then
if Go = '1' then
case Count is
when 0 =>
Shift <= "0101010101" & Data & '0';
Count <= Count + 1;
when 1 to 10 =>
Shift <= '0' & Shift(10 downto 1);
Count <= Count + 1;
when 11 =>
Tx <= Shift(0);
Count <= 0;
end case;
else
Count <= 0;
Shift <= (others => '0');
Tx <= '1';
end if;
end if;
end process;
end architecture;
```
以上代码实现了一个带有时钟、复位、数据输入和输出的UART TX模块。当Go信号为高电平时,模块会将数据按照UART通信协议进行编码并输出,输出的波特率为时钟频率的1/10。当Go信号为低电平时,模块会将输出信号置为高电平,并重置所有状态。请注意,这只是一个简单的实现,并且可能需要根据具体的需求进行调整。
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