220pack.vhd

一本老师推荐的经典的VHDL覆盖基础的入门书籍

-------------------------------------------------------------------------------
-- LPM 220 Component Declaration Package  (Support string type generic)
-- These models are based on LPM version 220 (EIA-IS103 October 1998).
-------------------------------------------------------------------------------
-- Assumptions:
--
--    LPM_SVALUE, LPM_AVALUE, LPM_MODULUS, and LPM_NUMWORDS, LPM_HINT,
--    LPM_STRENGTH, LPM_DIRECTION, and LPM_PVALUE  default value is 
--    string "UNUSED".
-------------------------------------------------------------------------------

library IEEE;
use IEEE.std_logic_1164.all;

package LPM_COMPONENTS is

constant L_CONSTANT : string := "LPM_CONSTANT";
constant L_INV      : string := "LPM_INV";
constant L_AND      : string := "LPM_AND";
constant L_OR       : string := "LPM_OR";
constant L_XOR      : string := "LPM_XOR";
constant L_BUSTRI   : string := "LPM_BUSTRI";
constant L_MUX      : string := "LPM_MUX";
constant L_DECODE   : string := "LPM_DECODE";
constant L_CLSHIFT  : string := "LPM_CLSHIFT";
constant L_ADD_SUB  : string := "LPM_ADD_SUB";
constant L_COMPARE  : string := "LPM_COMPARE";
constant L_MULT     : string := "LPM_MULT";
constant L_DIVIDE   : string := "LPM_DIVIDE";
constant L_ABS      : string := "LPM_ABS";
constant L_COUNTER  : string := "LPM_COUNTER";
constant L_LATCH    : string := "LPM_LATCH";
constant L_FF       : string := "LPM_FF";
constant L_SHIFTREG : string := "LPM_SHIFTREG";
constant L_RAM_DQ   : string := "LPM_RAM_DQ";
constant L_RAM_DP   : string := "LPM_RAM_DP";
constant L_RAM_IO   : string := "LPM_RAM_IO";
constant L_ROM      : string := "LPM_ROM";
constant L_FIFO     : string := "LPM_FIFO";
constant L_FIFO_DC  : string := "LPM_FIFO_DC";
constant L_TTABLE   : string := "LPM_TTABLE";
constant L_FSM      : string := "LPM_FSM";
constant L_INPAD    : string := "LPM_INPAD";
constant L_OUTPAD   : string := "LPM_OUTPAD";
constant L_BIPAD    : string := "LPM_BIPAD";
type STD_LOGIC_2D is array (NATURAL RANGE <>, NATURAL RANGE <>) of STD_LOGIC;

------------------------------------------------------------------------
-- GATES ---------------------------------------------------------------
------------------------------------------------------------------------

component LPM_CONSTANT
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0
                 LPM_CVALUE : natural;
                 LPM_STRENGTH : string := "UNUSED";
                 LPM_TYPE : string := L_CONSTANT;
                 LPM_HINT : string := "UNUSED");
        port (RESULT : out std_logic_vector(LPM_WIDTH-1 downto 0));
end component;

component LPM_INV
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0
                 LPM_TYPE : string := L_INV;
                 LPM_HINT : string := "UNUSED");
        port (DATA : in std_logic_vector(LPM_WIDTH-1 downto 0);
              RESULT : out std_logic_vector(LPM_WIDTH-1 downto 0));
end component;

component LPM_AND
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0
                 LPM_SIZE : natural;    -- MUST be greater than 0
                 LPM_TYPE : string := L_AND;
                 LPM_HINT : string := "UNUSED");
        port (DATA : in std_logic_2D(LPM_SIZE-1 downto 0, LPM_WIDTH-1 downto 0); 
              RESULT : out std_logic_vector(LPM_WIDTH-1 downto 0)); 
end component; 
 
component LPM_OR 
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0 
                 LPM_SIZE : natural;    -- MUST be greater than 0 
                 LPM_TYPE : string := L_OR;
                 LPM_HINT : string := "UNUSED");
        port (DATA : in std_logic_2D(LPM_SIZE-1 downto 0, LPM_WIDTH-1 downto 0); 
              RESULT : out std_logic_vector(LPM_WIDTH-1 downto 0)); 
end component; 

component LPM_XOR 
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0 
                 LPM_SIZE : natural;    -- MUST be greater than 0 
                 LPM_TYPE : string := L_XOR;
                 LPM_HINT : string := "UNUSED");
        port (DATA : in std_logic_2D(LPM_SIZE-1 downto 0, LPM_WIDTH-1 downto 0); 
              RESULT : out std_logic_vector(LPM_WIDTH-1 downto 0)); 
end component; 
 
component LPM_BUSTRI 
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0
                 LPM_TYPE : string := L_BUSTRI;
                 LPM_HINT : string := "UNUSED");
        port (DATA : in std_logic_vector(LPM_WIDTH-1 downto 0);
              ENABLEDT : in std_logic := '0';
              ENABLETR : in std_logic := '0';
              RESULT : out std_logic_vector(LPM_WIDTH-1 downto 0);
              TRIDATA : inout std_logic_vector(LPM_WIDTH-1 downto 0));
end component;

component LPM_MUX 
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0 
                 LPM_SIZE : natural;    -- MUST be greater than 0 
                 LPM_WIDTHS : natural;    -- MUST be greater than 0 
                 LPM_PIPELINE : natural := 0;
                 LPM_TYPE : string := L_MUX;
                 LPM_HINT : string := "UNUSED");
        port (DATA : in std_logic_2D(LPM_SIZE-1 downto 0, LPM_WIDTH-1 downto 0);
              ACLR : in std_logic := '0';
              CLOCK : in std_logic := '0';
              CLKEN : in std_logic := '1';
              SEL : in std_logic_vector(LPM_WIDTHS-1 downto 0); 
              RESULT : out std_logic_vector(LPM_WIDTH-1 downto 0));
end component;

component LPM_DECODE
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0
                 LPM_DECODES : natural;    -- MUST be greater than 0
                 LPM_PIPELINE : natural := 0;
                 LPM_TYPE : string := L_DECODE;
                 LPM_HINT : string := "UNUSED");
        port (DATA : in std_logic_vector(LPM_WIDTH-1 downto 0);
              CLOCK : in std_logic := '0';
              CLKEN : in std_logic := '1';
              ACLR : in std_logic := '0';
              ENABLE : in std_logic := '1';
              EQ : out std_logic_vector(LPM_DECODES-1 downto 0));
end component;

component LPM_CLSHIFT
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0
                 LPM_WIDTHDIST : natural;    -- MUST be greater than 0
                 LPM_SHIFTTYPE : string := "LOGICAL";
                 LPM_TYPE : string := L_CLSHIFT;
                 LPM_HINT : string := "UNUSED");
        port (DATA : in STD_LOGIC_VECTOR(LPM_WIDTH-1 downto 0); 
              DISTANCE : in STD_LOGIC_VECTOR(LPM_WIDTHDIST-1 downto 0); 
              DIRECTION : in STD_LOGIC := '0';
              RESULT : out STD_LOGIC_VECTOR(LPM_WIDTH-1 downto 0);
              UNDERFLOW : out STD_LOGIC;
              OVERFLOW : out STD_LOGIC);
end component;


------------------------------------------------------------------------
-- ARITHMETIC COMPONENTS -----------------------------------------------
------------------------------------------------------------------------

component LPM_ADD_SUB
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0
                 LPM_DIRECTION : string := "UNUSED";
                 LPM_REPRESENTATION: string := "SIGNED";
                 LPM_PIPELINE : natural := 0;
                 LPM_TYPE : string := L_ADD_SUB;
                 LPM_HINT : string := "UNUSED");
        port (DATAA : in std_logic_vector(LPM_WIDTH-1 downto 0);
              DATAB : in std_logic_vector(LPM_WIDTH-1 downto 0);
              ACLR : in std_logic := '0';
              CLOCK : in std_logic := '0';
              CLKEN : in std_logic := '1';
              CIN : in std_logic := 'Z';
              ADD_SUB : in std_logic := '1';
              RESULT : out std_logic_vector(LPM_WIDTH-1 downto 0);
              COUT : out std_logic;
              OVERFLOW : out std_logic);
end component;

component LPM_COMPARE
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0
                 LPM_REPRESENTATION : string := "UNSIGNED";
                 LPM_PIPELINE : natural := 0;
                 LPM_TYPE: string := L_COMPARE;
                 LPM_HINT : string := "UNUSED");
        port (DATAA : in std_logic_vector(LPM_WIDTH-1 downto 0);
              DATAB : in std_logic_vector(LPM_WIDTH-1 downto 0);
              ACLR : in std_logic := '0';
              CLOCK : in std_logic := '0';
              CLKEN : in std_logic := '1';
              AGB : out std_logic;
              AGEB : out std_logic;
              AEB : out std_logic;
              ANEB : out std_logic;
              ALB : out std_logic;
              ALEB : out std_logic);
end component;

component LPM_MULT
        generic (LPM_WIDTHA : natural;    -- MUST be greater than 0
                 LPM_WIDTHB : natural;    -- MUST be greater than 0
                 LPM_WIDTHS : natural := 1;
                 LPM_WIDTHP : natural;    -- MUST be greater than 0
                 LPM_REPRESENTATION : string := "UNSIGNED";
                 LPM_PIPELINE : natural := 0;
                 LPM_TYPE: string := L_MULT;
                 LPM_HINT : string := "UNUSED");
        port (DATAA : in std_logic_vector(LPM_WIDTHA-1 downto 0);
              DATAB : in std_logic_vector(LPM_WIDTHB-1 downto 0);
              ACLR : in std_logic := '0';
              CLOCK : in std_logic := '0';
              CLKEN : in std_logic := '1';
              SUM : in std_logic_vector(LPM_WIDTHS-1 downto 0) := (OTHERS => '0');
              RESULT : out std_logic_vector(LPM_WIDTHP-1 downto 0));
end component;
    
component LPM_DIVIDE
        generic (LPM_WIDTHN : natural;    -- MUST be greater than 0
                 LPM_WIDTHD : natural;    -- MUST be greater than 0
                 LPM_NREPRESENTATION : string := "UNSIGNED";
                 LPM_DREPRESENTATION : string := "UNSIGNED";
                 LPM_PIPELINE : natural := 0;
                 LPM_TYPE : string := L_DIVIDE;
                 LPM_HINT : string := "LPM_REMAINDERPOSITIVE=TRUE");
        port (NUMER : in std_logic_vector(LPM_WIDTHN-1 downto 0);
              DENOM : in std_logic_vector(LPM_WIDTHD-1 downto 0);
              ACLR : in std_logic := '0';
              CLOCK : in std_logic := '0';
              CLKEN : in std_logic := '1';
              QUOTIENT : out std_logic_vector(LPM_WIDTHN-1 downto 0);
              REMAIN : out std_logic_vector(LPM_WIDTHD-1 downto 0));
end component;
                
component LPM_ABS
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0
                 LPM_TYPE: string := L_ABS;
                 LPM_HINT : string := "UNUSED");
        port (DATA : in std_logic_vector(LPM_WIDTH-1 downto 0);
              RESULT : out std_logic_vector(LPM_WIDTH-1 downto 0);
              OVERFLOW : out std_logic);
end component;

component LPM_COUNTER
        generic (LPM_WIDTH : natural;    -- MUST be greater than 0
                 LPM_MODULUS : natural := 0;
                 LPM_DIRECTION : string := "UNUSED";
                 LPM_AVALUE : string := "UNUSED";
                 LPM_SVALUE : string := "UNUSED";
                 LPM_PVALUE : string := "UNUSED";
                 LPM_TYPE: string := L_COUNTER;
                 LPM_HINT : string := "UNUSED");
        port (DATA : in std_logic_vector(LPM_WIDTH-1 downto 0):= (OTHERS => '0');
              CLOCK : in std_logic ;
              CLK_EN : in std_logic := '1';
              CNT_EN : in std_logic := '1';
              UPDOWN : in std_logic := '1';
              SLOAD : in std_logic := '0';
              SSET : in std_logic := '0';
              SCLR : in std_logic := '0';
              ALOAD : in std_logic := '0';
              ASET : in std_logic := '0';
              ACLR : in std_logic := '0';
              CIN : in std_logic := '1';
              COUT : out std_logic := '0';