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[/] [mkjpeg/] [tags/] [REL_53/] [trunk/] [design/] [mdct/] [MDCT.VHD] - Rev 56
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--------------------------------------------------------------------------------
-- --
-- V H D L F I L E --
-- COPYRIGHT (C) 2006-2009 --
-- --
--------------------------------------------------------------------------------
--
-- Title : DCT
-- Design : MDCT Core
-- Author : Michal Krepa
-- Company : None
--
--------------------------------------------------------------------------------
--
-- File : MDCT.VHD
-- Created : Sat Feb 25 16:12 2006
--
--------------------------------------------------------------------------------
--
-- Description : Discrete Cosine Transform - chip top level (w/ memories)
--
--------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.all;
library WORK;
use WORK.MDCT_PKG.all;
entity MDCT is
port(
clk : in STD_LOGIC;
rst : in std_logic;
dcti : in std_logic_vector(IP_W-1 downto 0);
idv : in STD_LOGIC;
odv : out STD_LOGIC;
dcto : out std_logic_vector(COE_W-1 downto 0);
-- debug
odv1 : out STD_LOGIC;
dcto1 : out std_logic_vector(OP_W-1 downto 0)
);
end MDCT;
architecture RTL of MDCT is
signal ramdatao_s : STD_LOGIC_VECTOR(RAMDATA_W-1 downto 0);
signal ramraddro_s : STD_LOGIC_VECTOR(RAMADRR_W-1 downto 0);
signal ramwaddro_s : STD_LOGIC_VECTOR(RAMADRR_W-1 downto 0);
signal ramdatai_s : STD_LOGIC_VECTOR(RAMDATA_W-1 downto 0);
signal ramwe_s : STD_LOGIC;
signal romedatao_s : T_ROM1DATAO;
signal romodatao_s : T_ROM1DATAO;
signal romeaddro_s : T_ROM1ADDRO;
signal romoaddro_s : T_ROM1ADDRO;
signal rome2datao_s : T_ROM2DATAO;
signal romo2datao_s : T_ROM2DATAO;
signal rome2addro_s : T_ROM2ADDRO;
signal romo2addro_s : T_ROM2ADDRO;
signal odv2_s : STD_LOGIC;
signal dcto2_s : STD_LOGIC_VECTOR(OP_W-1 downto 0);
signal trigger2_s : STD_LOGIC;
signal trigger1_s : STD_LOGIC;
signal ramdatao1_s : STD_LOGIC_VECTOR(RAMDATA_W-1 downto 0);
signal ramdatao2_s : STD_LOGIC_VECTOR(RAMDATA_W-1 downto 0);
signal ramwe1_s : STD_LOGIC;
signal ramwe2_s : STD_LOGIC;
signal memswitchrd_s : STD_LOGIC;
signal memswitchwr_s : STD_LOGIC;
signal wmemsel_s : STD_LOGIC;
signal rmemsel_s : STD_LOGIC;
signal dataready_s : STD_LOGIC;
signal datareadyack_s : STD_LOGIC;
begin
------------------------------
-- 1D DCT port map
------------------------------
U_DCT1D : entity work.DCT1D
port map(
clk => clk,
rst => rst,
dcti => dcti,
idv => idv,
romedatao => romedatao_s,
romodatao => romodatao_s,
odv => odv1,
dcto => dcto1,
romeaddro => romeaddro_s,
romoaddro => romoaddro_s,
ramwaddro => ramwaddro_s,
ramdatai => ramdatai_s,
ramwe => ramwe_s,
wmemsel => wmemsel_s
);
------------------------------
-- 1D DCT port map
------------------------------
U_DCT2D : entity work.DCT2D
port map(
clk => clk,
rst => rst,
romedatao => rome2datao_s,
romodatao => romo2datao_s,
ramdatao => ramdatao_s,
dataready => dataready_s,
odv => odv,
dcto => dcto,
romeaddro => rome2addro_s,
romoaddro => romo2addro_s,
ramraddro => ramraddro_s,
rmemsel => rmemsel_s,
datareadyack => datareadyack_s
);
------------------------------
-- RAM1 port map
------------------------------
U1_RAM : entity work.RAM
port map (
d => ramdatai_s,
waddr => ramwaddro_s,
raddr => ramraddro_s,
we => ramwe1_s,
clk => clk,
q => ramdatao1_s
);
------------------------------
-- RAM2 port map
------------------------------
U2_RAM : entity work.RAM
port map (
d => ramdatai_s,
waddr => ramwaddro_s,
raddr => ramraddro_s,
we => ramwe2_s,
clk => clk,
q => ramdatao2_s
);
-- double buffer switch
ramwe1_s <= ramwe_s when memswitchwr_s = '0' else '0';
ramwe2_s <= ramwe_s when memswitchwr_s = '1' else '0';
ramdatao_s <= ramdatao1_s when memswitchrd_s = '0' else ramdatao2_s;
------------------------------
-- DBUFCTL
------------------------------
U_DBUFCTL : entity work.DBUFCTL
port map(
clk => clk,
rst => rst,
wmemsel => wmemsel_s,
rmemsel => rmemsel_s,
datareadyack => datareadyack_s,
memswitchwr => memswitchwr_s,
memswitchrd => memswitchrd_s,
dataready => dataready_s
);
------------------------------
-- 1st stage ROMs
------------------------------
G_ROM_ST1 : for i in 0 to 8 generate
U1_ROME : entity work.ROME
port map(
addr => romeaddro_s(i),
clk => clk,
datao => romedatao_s(i)
);
U1_ROMO : entity work.ROMO
port map(
addr => romoaddro_s(i),
clk => clk,
datao => romodatao_s(i)
);
end generate G_ROM_ST1;
------------------------------
-- 2nd stage ROMs
------------------------------
G_ROM_ST2 : for i in 0 to 10 generate
U2_ROME : entity work.ROME
port map(
addr => rome2addro_s(i),
clk => clk,
datao => rome2datao_s(i)
);
U2_ROMO : entity work.ROMO
port map(
addr => romo2addro_s(i),
clk => clk,
datao => romo2datao_s(i)
);
end generate G_ROM_ST2;
end RTL;
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