axi4-stream data fifo
时间: 2023-04-27 17:06:07 浏览: 105
Axi4-stream data FIFO 是一种在 AXI4-Stream 总线上传输数据的缓存器。它可以用来缓存和控制在 AXI4-Stream 总线上传输的数据流。通常用于在多个 IP 核之间传输数据。
相关问题
axi4-stream data fifo ip核
B'axi4-stream data fifo ip核'是一种用于处理AXI4-Stream数据流的IP核。它可以实现先进先出(FIFO)缓存数据,以支持灵活且高效的数据传输。 其主要功能包括数据写入,数据读取和FIFO指针管理等。
axi4-stream-fifo写数据仿真的vhdl实现
以下是一个简单的AXI4-Stream FIFO写数据的VHDL实现,可以用于仿真或实际硬件实现:
```vhdl
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
entity axi4_stream_fifo is
generic (
DATA_WIDTH : integer := 32; -- 数据宽度
ADDR_WIDTH : integer := 6; -- 地址宽度
MAX_DEPTH : integer := 64 -- 最大深度
);
port (
-- AXI4-Stream接口
s_axis_tdata : in std_logic_vector(DATA_WIDTH-1 downto 0);
s_axis_tvalid : in std_logic;
s_axis_tready : out std_logic;
-- AXI接口
s_axi_awaddr : in std_logic_vector(ADDR_WIDTH-1 downto 0);
s_axi_awvalid : in std_logic;
s_axi_awready : out std_logic;
s_axi_wdata : in std_logic_vector(DATA_WIDTH-1 downto 0);
s_axi_wvalid : in std_logic;
s_axi_wready : out std_logic;
s_axi_bresp : out std_logic_vector(1 downto 0);
s_axi_bvalid : out std_logic;
s_axi_bready : in std_logic
);
end entity;
architecture rtl of axi4_stream_fifo is
-- FIFO深度计数器
signal count : integer range 0 to MAX_DEPTH-1 := 0;
-- FIFO存储器
type fifo_mem_t is array (0 to MAX_DEPTH-1) of std_logic_vector(DATA_WIDTH-1 downto 0);
signal fifo_mem : fifo_mem_t := (others => (others => '0'));
begin
-- AXI4-Stream接口写数据
write_data: process (s_axis_tdata, s_axis_tvalid, s_axis_tready) is
begin
if (s_axis_tvalid = '1' and s_axis_tready = '1') then
-- 数据写入FIFO
fifo_mem(count) <= s_axis_tdata;
count <= count + 1;
end if;
end process;
-- AXI接口响应写请求
respond_write: process (s_axi_awaddr, s_axi_awvalid, s_axi_awready, s_axi_wdata, s_axi_wvalid, s_axi_wready) is
begin
if (s_axi_awvalid = '1' and s_axi_awready = '1' and s_axi_wvalid = '1' and s_axi_wready = '1') then
-- 写入FIFO的地址为当前深度
s_axi_awaddr <= std_logic_vector(to_unsigned(count-1, ADDR_WIDTH));
-- 写入数据
fifo_mem(count-1) <= s_axi_wdata;
-- 计数器加1
count <= count + 1;
-- 响应写请求
s_axi_bresp <= "00";
s_axi_bvalid <= '1';
end if;
end process;
-- AXI接口读请求
read_request: process (s_axi_awaddr, s_axi_awvalid, s_axi_awready) is
begin
if (s_axi_awvalid = '1' and s_axi_awready = '1') then
-- 读请求的地址为0
s_axi_awaddr <= (others => '0');
-- 响应读请求
s_axi_bresp <= "00";
s_axi_bvalid <= '1';
end if;
end process;
-- AXI接口读数据
read_data: process (s_axi_araddr, s_axi_arvalid, s_axi_arready) is
begin
if (s_axi_arvalid = '1' and s_axi_arready = '1') then
-- 读取FIFO的第一个数据
s_axi_rdata <= fifo_mem(0);
-- 读取后计数器减1
count <= count - 1;
-- 响应读请求
s_axi_rvalid <= '1';
end if;
end process;
end architecture;
```
请注意,这只是一个简单的实现,没有考虑流控制和错误处理。在实际应用中,您可能需要更多的功能和保护。