RAM_CTRLR_v2.vhd
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| 4.2 KiB
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VhdlLexer
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r183 | ------------------------------------------------------------------------------ | ||
-- This file is a part of the LPP VHDL IP LIBRARY | ||||
-- Copyright (C) 2009 - 2010, Laboratory of Plasmas Physic - CNRS | ||||
-- | ||||
-- This program is free software; you can redistribute it and/or modify | ||||
-- it under the terms of the GNU General Public License as published by | ||||
-- the Free Software Foundation; either version 3 of the License, or | ||||
-- (at your option) any later version. | ||||
-- | ||||
-- This program is distributed in the hope that it will be useful, | ||||
-- but WITHOUT ANY WARRANTY; without even the implied warranty of | ||||
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||||
-- GNU General Public License for more details. | ||||
-- | ||||
-- You should have received a copy of the GNU General Public License | ||||
-- along with this program; if not, write to the Free Software | ||||
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||||
------------------------------------------------------------------------------- | ||||
-- Author : Alexis Jeandet | ||||
-- Mail : alexis.jeandet@lpp.polytechnique.fr | ||||
---------------------------------------------------------------------------- | ||||
LIBRARY IEEE; | ||||
USE IEEE.numeric_std.ALL; | ||||
USE IEEE.std_logic_1164.ALL; | ||||
LIBRARY lpp; | ||||
USE lpp.iir_filter.ALL; | ||||
USE lpp.FILTERcfg.ALL; | ||||
USE lpp.general_purpose.ALL; | ||||
LIBRARY techmap; | ||||
USE techmap.gencomp.ALL; | ||||
ENTITY RAM_CTRLR_v2 IS | ||||
GENERIC( | ||||
tech : INTEGER := 0; | ||||
Input_SZ_1 : INTEGER := 16; | ||||
Mem_use : INTEGER := use_RAM | ||||
); | ||||
PORT( | ||||
rstn : IN STD_LOGIC; | ||||
clk : IN STD_LOGIC; | ||||
-- R/W Ctrl | ||||
ram_write : IN STD_LOGIC; | ||||
ram_read : IN STD_LOGIC; | ||||
-- ADDR Ctrl | ||||
raddr_rst : IN STD_LOGIC; | ||||
raddr_add1 : IN STD_LOGIC; | ||||
waddr_previous : IN STD_LOGIC_VECTOR(1 DOWNTO 0); | ||||
-- Data | ||||
sample_in : IN STD_LOGIC_VECTOR(Input_SZ_1-1 DOWNTO 0); | ||||
sample_out : OUT STD_LOGIC_VECTOR(Input_SZ_1-1 DOWNTO 0) | ||||
); | ||||
END RAM_CTRLR_v2; | ||||
ARCHITECTURE ar_RAM_CTRLR_v2 OF RAM_CTRLR_v2 IS | ||||
SIGNAL WD : STD_LOGIC_VECTOR(Input_SZ_1-1 DOWNTO 0); | ||||
SIGNAL RD : STD_LOGIC_VECTOR(Input_SZ_1-1 DOWNTO 0); | ||||
SIGNAL WEN, REN : STD_LOGIC; | ||||
SIGNAL RADDR : STD_LOGIC_VECTOR(7 DOWNTO 0); | ||||
SIGNAL WADDR : STD_LOGIC_VECTOR(7 DOWNTO 0); | ||||
SIGNAL counter : STD_LOGIC_VECTOR(7 DOWNTO 0); | ||||
BEGIN | ||||
sample_out <= RD(Input_SZ_1-1 DOWNTO 0); | ||||
WD(Input_SZ_1-1 DOWNTO 0) <= sample_in; | ||||
----------------------------------------------------------------------------- | ||||
-- RAM | ||||
----------------------------------------------------------------------------- | ||||
memCEL : IF Mem_use = use_CEL GENERATE | ||||
WEN <= NOT ram_write; | ||||
REN <= NOT ram_read; | ||||
paul
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r184 | -- RAMblk : RAM_CEL_N | ||
pellion
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r183 | RAMblk : RAM_CEL_N | ||
GENERIC MAP(Input_SZ_1) | ||||
PORT MAP( | ||||
WD => WD, | ||||
RD => RD, | ||||
WEN => WEN, | ||||
REN => REN, | ||||
WADDR => WADDR, | ||||
RADDR => RADDR, | ||||
RWCLK => clk, | ||||
RESET => rstn | ||||
) ; | ||||
END GENERATE; | ||||
memRAM : IF Mem_use = use_RAM GENERATE | ||||
SRAM : syncram_2p | ||||
GENERIC MAP(tech, 8, Input_SZ_1) | ||||
PORT MAP(clk, ram_read, RADDR, RD, clk, ram_write, WADDR, WD); | ||||
END GENERATE; | ||||
----------------------------------------------------------------------------- | ||||
-- RADDR | ||||
----------------------------------------------------------------------------- | ||||
PROCESS (clk, rstn) | ||||
BEGIN -- PROCESS | ||||
IF rstn = '0' THEN -- asynchronous reset (active low) | ||||
counter <= (OTHERS => '0'); | ||||
ELSIF clk'EVENT AND clk = '1' THEN -- rising clock edge | ||||
IF raddr_rst = '1' THEN | ||||
counter <= (OTHERS => '0'); | ||||
ELSIF raddr_add1 = '1' THEN | ||||
counter <= STD_LOGIC_VECTOR(UNSIGNED(counter)+1); | ||||
END IF; | ||||
END IF; | ||||
END PROCESS; | ||||
RADDR <= counter; | ||||
----------------------------------------------------------------------------- | ||||
-- WADDR | ||||
----------------------------------------------------------------------------- | ||||
WADDR <= STD_LOGIC_VECTOR(UNSIGNED(counter)-2) WHEN waddr_previous = "10" ELSE | ||||
STD_LOGIC_VECTOR(UNSIGNED(counter)-1) WHEN waddr_previous = "01" ELSE | ||||
STD_LOGIC_VECTOR(UNSIGNED(counter)); | ||||
pellion
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r313 | END ar_RAM_CTRLR_v2; | ||