使用tri mode Ethernet mac 调试网口的VHDL代码
时间: 2024-01-08 10:04:22 浏览: 44
以下是使用tri mode Ethernet mac调试网口的VHDL代码示例:
```
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity tri_mode_eth_mac is
port (
-- Clock and reset signals
clk_i : in std_logic;
rst_i : in std_logic;
-- Tri mode Ethernet mac interface
gmii_rx_clk_i : in std_logic;
gmii_rx_dv_i : in std_logic;
gmii_rx_er_i : in std_logic;
gmii_rx_data_i : in std_logic_vector(3 downto 0);
gmii_tx_clk_i : in std_logic;
gmii_tx_en_o : out std_logic;
gmii_tx_er_o : out std_logic;
gmii_tx_data_o : out std_logic_vector(3 downto 0);
-- Other interface signals
reset_n_o : out std_logic;
led_o : out std_logic_vector(3 downto 0)
);
end entity tri_mode_eth_mac;
architecture rtl of tri_mode_eth_mac is
-- Internal signals
signal clk_125 : std_logic;
signal reset_n : std_logic;
signal gmii_rx_data : std_logic_vector(47 downto 0);
signal gmii_tx_data : std_logic_vector(47 downto 0);
signal tx_en : std_logic;
signal tx_er : std_logic;
signal tx_data : std_logic_vector(47 downto 0);
signal rx_data : std_logic_vector(47 downto 0);
signal led : std_logic_vector(3 downto 0);
begin
-- Clock divider for 125MHz clock
clk_125_div : entity work.clock_divider
generic map (
CLK_DIVIDE => 2
)
port map (
clk_i => clk_i,
rst_i => rst_i,
clk_o => clk_125
);
-- Clock and reset signals for tri mode Ethernet mac
clock_reset : entity work.clock_reset
generic map (
CLOCK_DIVIDE => 4,
RESET_ASSERT_CYCLES => 10
)
port map (
clk_i => clk_125,
rst_i => rst_i,
clk_o => gmii_rx_clk_i,
reset_n_o => reset_n
);
-- Tri mode Ethernet mac instance
tri_mode_eth_mac_inst : entity work.tri_mode_eth_mac_inst
port map (
gmii_rx_clk_i => gmii_rx_clk_i,
gmii_rx_dv_i => gmii_rx_dv_i,
gmii_rx_er_i => gmii_rx_er_i,
gmii_rx_data_i => gmii_rx_data_i,
gmii_tx_clk_i => gmii_tx_clk_i,
gmii_tx_en_o => gmii_tx_en_o,
gmii_tx_er_o => gmii_tx_er_o,
gmii_tx_data_o => gmii_tx_data_o
);
-- LED output
led <= gmii_rx_data(3 downto 0) when gmii_rx_dv_i = '1' else "1111";
led_o <= led;
-- GMII receive path
gmii_rx_data <= gmii_rx_data_i & gmii_rx_data_i & gmii_rx_data_i & gmii_rx_data_i;
rx_data <= gmii_rx_data(47 downto 0) when gmii_rx_dv_i = '1' else (others => '0');
-- GMII transmit path
tx_en <= '1' when tx_data /= (others => '0') else '0';
tx_er <= '0';
gmii_tx_en_o <= tx_en;
gmii_tx_er_o <= tx_er;
gmii_tx_data_o <= std_logic_vector(resize(unsigned(tx_data), 4));
-- Loopback mode
tx_data <= rx_data;
-- Reset signal
reset_n <= not rst_i;
end architecture rtl;
```
这个示例代码包含一个tri mode Ethernet mac控制器实例和一些辅助逻辑,可以实现简单的循环回环测试。在接收到数据时,将数据显示在4个LED灯上,并将数据通过循环回环方式发送回去。请注意,此代码仅供参考,具体实现可能因平台和需求而异。