top.vhd

串口驱动以及串口调试的源代码

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
 
entity top is
    Port (clk32mhz,reset,rxd,xmit_cmd_p_in:   in std_logic;        --总的输入输出信号的定义
          txdbuf_in:    in std_logic_vector(7 downto 0);
          rec_ready,txd_out,txd_done_out:out std_logic;
          rec_buf:out std_logic_vector(7 downto 0));              
end top;
 
architecture behavioral of top is
component reciever
    Port (bclkr,resetr,rxdr:in std_logic;
          r_ready:out std_logic;
          rbuf:out std_logic_vector(7 downto 0));
end component;

component transfer
    Port (bclkt,resett,xmit_cmd_p:in std_logic;
          txdbuf:in std_logic_vector(7 downto 0);
          txd:out std_logic;
          txd_done:out std_logic);
end component;

component baud
    Port (clk,resetb:in std_logic;
          bclk:out std_logic);
end component;

signal b:std_logic;

begin
u1:baud port map(clk=>clk32mhz,resetb=>reset,bclk=>b);             --顶层映射
u2:reciever port map(bclkr=>b,resetr=>reset,rxdr=>rxd,r_ready=>rec_ready,
                     rbuf=>rec_buf);
u3:transfer port map(bclkt=>b,resett=>reset,xmit_cmd_p=>xmit_cmd_p_in,
                     txdbuf=>txdbuf_in,txd=>txd_out,txd_done=>txd_done_out);
 
end behavioral;