基于VHDL的LVDS高速通信设计实现
时间: 2023-09-19 16:11:07 浏览: 176
一种基于LVDS的高速串行数据传输系统设计
LVDS(Low Voltage Differential Signaling,低电压差分信号传输)是一种高速、低功耗、低噪声的数字信号传输技术。它通常用于数据传输或时钟传输等需要高速、可靠的应用中。
下面是一个基于VHDL的LVDS高速通信设计实现的简单示例:
首先,我们需要定义一个LVDS发送器和接收器的接口。这里我们定义了一个8位数据和时钟信号的LVDS接口:
```
entity lvds_interface is
port (
clk : in std_logic;
data_in : in std_logic_vector(7 downto 0);
lvds_p : out std_logic;
lvds_n : out std_logic
);
end entity lvds_interface;
```
LVDS发送器的实现如下:
```
entity lvds_transmitter is
port (
clk : in std_logic;
data_in : in std_logic_vector(7 downto 0);
lvds_p : out std_logic;
lvds_n : out std_logic
);
end entity lvds_transmitter;
architecture rtl of lvds_transmitter is
signal data_p : std_logic_vector(7 downto 0);
signal data_n : std_logic_vector(7 downto 0);
begin
-- 差分信号生成
data_p <= data_in xor "11111111";
data_n <= data_in;
-- LVDS发送器
process(clk)
begin
if rising_edge(clk) then
lvds_p <= data_p(0);
lvds_n <= data_n(0);
data_p <= ('0' & data_p(7 downto 1));
data_n <= ('0' & data_n(7 downto 1));
end if;
end process;
end architecture rtl;
```
LVDS接收器的实现如下:
```
entity lvds_receiver is
port (
clk : in std_logic;
lvds_p : in std_logic;
lvds_n : in std_logic;
data_out : out std_logic_vector(7 downto 0)
);
end entity lvds_receiver;
architecture rtl of lvds_receiver is
signal data_p : std_logic_vector(7 downto 0);
signal data_n : std_logic_vector(7 downto 0);
begin
-- 差分信号接收
data_p <= lvds_p xor '1';
data_n <= lvds_n;
-- LVDS接收器
process(clk)
begin
if rising_edge(clk) then
data_out <= data_p;
data_p <= ('0' & data_p(7 downto 1));
data_n <= ('0' & data_n(7 downto 1));
end if;
end process;
end architecture rtl;
```
以上是一个简单的LVDS高速通信设计实现的示例,可以根据具体的应用需求进行修改和优化。
阅读全文