ps2_mouse9.vhd

PS2键盘鼠标接口控制实现电子琴功能

LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
use	ieee.std_logic_arith.all;
use	ieee.std_logic_unsigned.all;

 ENTITY ps2_mouse9 IS                                      -- 顶层设计
    PORT (       CLK1 : IN STD_LOGIC;
               CODE1  : OUT std_logic_vector(3 downto 0);
                SPKS  : OUT STD_LOGIC  ;

               reset  :   in std_logic;
		       clk    :   in std_logic;		-- 750kHz
	     	 ps2_clk  :  INOUT  STD_LOGIC;
		     ps2_data :  INOUT  STD_LOGIC;
-------------------------------------------------
           ps2_clk00  :  INOUT  STD_LOGIC;
		   ps2_data00 :  INOUT  STD_LOGIC;
    -------------------------------------------
          enk_1       :  out  std_logic;   
        ---------------------------------------
           ps2_data2  :  out  std_logic_vector(7 downto 0);
          ---------------------------------------------------------
          ps2_data2A  :  out  std_logic_vector(7 downto 0);
       ps2_data3A  :  out  std_logic_vector(7 downto 0)
      			 );
  END ps2_mouse9;

ARCHITECTURE bdf_type OF ps2_mouse9 IS 
---------------------------------------------------------------
COMPONENT PS2
port
	(   reset0	 :   in std_logic;
		clk0	     :   in std_logic;		-- 750kHz
		ps2_clk0  :  INOUT  STD_LOGIC;
		ps2_data0 :  INOUT  STD_LOGIC;
    -------------------------------------------
       ps2_data20  :  out  std_logic_vector(7 downto 0);
       ps2_data30  :  out  std_logic_vector(7 downto 0)
           			 );
	  END COMPONENT;
      SIGNAL   DATA0 : std_logic_vector(7 downto 0);
     
---------------------------------------------------------------  
  SIGNAL   PreCLK , FullSpkS : STD_LOGIC;
  signal  TONE :  INTEGER RANGE 0 TO 16#7FF#;

  signal	  senddata    :  STD_LOGIC_VECTOR(11 DOWNTO 0);
  constant    ps2_f4      : std_logic_vector(10 downto 0) := B"10_11110100_0";
  signal    ps2_data_s    : std_logic;
  signal    ps2_clk_s     : std_logic;
  signal      enk         : std_logic;
  signal     lowtimecount : std_logic_vector(6 downto 0);
  signal     ps2_clk_r    : std_logic;
-----------------------------------------------------
  signal  flag            :   std_logic;
-----------------------------------------------------
 signal   always_one  :  std_logic; 
 signal   q_data1_x   :   std_logic_vector(8 downto 0);
 signal   q_data2_x   :   std_logic_vector(8 downto 0);
 signal   q_data3_x   :   std_logic_vector(8 downto 0);
 signal   q_data4_x   :   std_logic_vector(8 downto 0);
 signal   q_data1     :   std_logic_vector(7 downto 0);
 signal   q_data2     :   std_logic_vector(7 downto 0);
 signal   q_data3     :   std_logic_vector(7 downto 0);
 signal   q_data4     :   std_logic_vector(7 downto 0);

 signal   count         :   std_logic_vector(3 downto 0);
----------------------------------------------
 type statetype is ( m2_st0,m2_new,m2_st1,m2_st2,m2_st3,m2_st4,m2_st5,m2_st6,m2_st7,m2_st8,m2_st9,
             m2_st10,m2_st11,m2_st12,m2_st13,m2_st14,m2_st15,m2_st16,m2_st17,m2_st18,m2_st19,
             m2_st20,m2_st21,m2_st22,m2_st23,m2_st24,m2_st25,m2_st26,m2_st27,m2_st28,m2_st29,
             m2_st30,m2_st31,m2_st32,m2_st33,m2_st34,m2_st35,m2_st36,m2_st37,m2_st38,m2_st39,
                     m2_st40,m2_st41,m2_st42,m2_st43,m2_st44,m2_st45,m2_st46); 
 signal  m2_state,m2_nexts  :  statetype;

    SIGNAL Tone2  : INTEGER RANGE 0 TO 16#7FF#;
    SIGNAL INDEXV : STD_LOGIC_VECTOR(3 DOWNTO 0);

  -----------------------------------
   BEGIN 

    
  ps2_data_s <= senddata(0);

  ps2_clk <= '0' when ps2_clk_s = '0' else  'Z';
	
  ps2_data <= '0' when ps2_data_s = '0' else  'Z';
  enk_1<= not enk;
--------------------------------------------------------
  process(reset)  begin
       if  reset'event and reset='0'  then  flag<='1';
                            end if;
         end process;
----------------------------------------------------------
u1: process(clk,reset) begin
	  if reset = '1' then
		 lowtimecount <= (others => '0');
		 enk <= '0';
		 ps2_clk_s <= '1';
	  elsif falling_edge(clk) then
---------------------- 
if  flag='1'  then
---------------------
		 if lowtimecount < 100 then
			lowtimecount <= lowtimecount + 1;
			ps2_clk_s <= '0';
		 elsif lowtimecount <120 then
			lowtimecount <= lowtimecount + 1;
			enk <= '1';
		 else
			ps2_clk_s <= '1';
			enk <= '0';
		end if;
	end if;
end if;
    end process;

u2:process(clk) begin
	if falling_edge(clk) then
		ps2_clk_r <= ps2_clk;
	end if;
    end process;

u3:process(ps2_clk_r,enk) begin
     if enk = '1' then 
		senddata <= '1' & ps2_f4 ;
	 elsif falling_edge(ps2_clk_r) then
  	    senddata(11 downto 0) <= '1' & senddata(11 downto 1);
	 end if;
   end process;

------------------------------------------------Receve part--------------------------
    con: process( enk,ps2_clk_r)   
         begin
          if enk='1' then
             count<=(others=>'0');   --count
          elsif(ps2_clk_r'event and ps2_clk_r='0') then         --receive at rising_edfe
             if count<15 then
                count<=count+1;
             end if;
          end if;
        end process;

  u4:  process(clk)
       begin
          if(clk'event and clk='1')  then
                 m2_state<=m2_nexts;
          end if;
       end process;
 u5:   process(ps2_clk_r,count,ps2_data)  
 
      begin
      if(count<10)  then               
           m2_nexts<=m2_st0;

      elsif(ps2_clk_r'event and ps2_clk_r='1') then
           case m2_state is
       when  m2_st0=>   --------------------
                     --   m2_nexts<=m2_new;
                        m2_nexts<=m2_st1;
       when  m2_st1=>   m2_nexts<=m2_st3;
 ------------------------------                                          
 
       when  m2_st3=>   m2_nexts<=m2_st4;                        --start
                                                                  
       when  m2_st4=>   m2_nexts<=m2_st5;                         --data0
               q_data1_x<=ps2_data&q_data1_x(8 downto 1);    
       when  m2_st5=>   m2_nexts<=m2_st6;
               q_data1_x<=ps2_data&q_data1_x(8 downto 1);   
       when  m2_st6=>   m2_nexts<=m2_st7; 
               q_data1_x<=ps2_data&q_data1_x(8 downto 1);   
       when  m2_st7=>   m2_nexts<=m2_st8;
               q_data1_x<=ps2_data&q_data1_x(8 downto 1); 
       when  m2_st8=>   m2_nexts<=m2_st9;
               q_data1_x<=ps2_data&q_data1_x(8 downto 1);   
       when  m2_st9=>   m2_nexts<=m2_st10;   
               q_data1_x<=ps2_data&q_data1_x(8 downto 1);        
       when  m2_st10=>  m2_nexts<=m2_st11; 
               q_data1_x<=ps2_data&q_data1_x(8 downto 1);               
       when  m2_st11=>  m2_nexts<=m2_st12;              
               q_data1_x<=ps2_data&q_data1_x(8 downto 1);        --data7    
                                      --  q_data1<=q_data1_x(8 downto 1);  
               
       when  m2_st12=>  m2_nexts<=m2_st13;
               q_data1_x<=ps2_data&q_data1_x(8 downto 1);   
                                      q_data1<=q_data1_x(8 downto 1);                    
       when  m2_st13=>  m2_nexts<=m2_st14;
---------------------------------------------------------------------                
       when  m2_st14=>  m2_nexts<=m2_st15;