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[/] [spdif_interface/] [tags/] [spdif_rel_1/] [rtl/] [vhdl/] [dpram_altera.vhd] - Rev 73
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---------------------------------------------------------------------- ---- ---- ---- WISHBONE SPDIF IP Core ---- ---- ---- ---- This file is part of the SPDIF project ---- ---- http://www.opencores.org/cores/spdif_interface/ ---- ---- ---- ---- Description ---- ---- Dual port ram. This version is specific for Altera FPGA's, ---- ---- and uses Altera library to instantiate block ram. ---- ---- ---- ---- ---- ---- To Do: ---- ---- - ---- ---- ---- ---- Author(s): ---- ---- - Geir Drange, gedra@opencores.org ---- ---- ---- ---------------------------------------------------------------------- ---- ---- ---- Copyright (C) 2004 Authors and OPENCORES.ORG ---- ---- ---- ---- This source file may be used and distributed without ---- ---- restriction provided that this copyright statement is not ---- ---- removed from the file and that any derivative work contains ---- ---- the original copyright notice and the associated disclaimer. ---- ---- ---- ---- This source file is free software; you can redistribute it ---- ---- and/or modify it under the terms of the GNU Lesser General ---- ---- Public License as published by the Free Software Foundation; ---- ---- either version 2.1 of the License, or (at your option) any ---- ---- later version. ---- ---- ---- ---- This source 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 Lesser General Public License for more ---- ---- details. ---- ---- ---- ---- You should have received a copy of the GNU Lesser General ---- ---- Public License along with this source; if not, download it ---- ---- from http://www.opencores.org/lgpl.shtml ---- ---- ---- ---------------------------------------------------------------------- -- -- CVS Revision History -- -- $Log: not supported by cvs2svn $ -- Revision 1.2 2004/06/19 09:55:19 gedra -- Delint'ed and changed name of architecture. -- -- Revision 1.1 2004/06/18 18:40:04 gedra -- Alternate dual port memory implementation for Altera FPGA's. -- -- library ieee; use ieee.std_logic_1164.all; library lpm; use lpm.lpm_components.all; entity dpram is generic (DATA_WIDTH: positive; RAM_WIDTH: positive); port ( clk: in std_logic; rst: in std_logic; -- reset is optional, not used here din: in std_logic_vector(DATA_WIDTH - 1 downto 0); wr_en: in std_logic; rd_en: in std_logic; wr_addr: in std_logic_vector(RAM_WIDTH - 1 downto 0); rd_addr: in std_logic_vector(RAM_WIDTH - 1 downto 0); dout: out std_logic_vector(DATA_WIDTH - 1 downto 0)); end dpram; architecture altera of dpram is component lpm_ram_dp generic ( LPM_WIDTH: positive; LPM_WIDTHAD: positive; LPM_NUMWORDS: natural := 0; LPM_INDATA: string := "REGISTERED"; LPM_OUTDATA: string := "REGISTERED"; LPM_RDADDRESS_CONTROL: string := "REGISTERED"; LPM_WRADDRESS_CONTROL: string := "REGISTERED"; LPM_FILE: string := "UNUSED"; LPM_TYPE: string := "LPM_RAM_DP"; LPM_HINT: string := "UNUSED"); port ( data: in std_logic_vector(LPM_WIDTH-1 downto 0); rdaddress, wraddress: in std_logic_vector(LPM_WIDTHAD-1 downto 0); rdclock, wrclock: in std_logic := '0'; rden, rdclken, wrclken: in std_logic := '1'; wren: in std_logic; q: out std_logic_vector(LPM_WIDTH-1 downto 0)); end component; signal one: std_logic; begin one <= '1'; ram: lpm_ram_dp generic map(LPM_WIDTH => DATA_WIDTH, LPM_WIDTHAD => RAM_WIDTH, LPM_NUMWORDS => 2**RAM_WIDTH) port map (data => din, rdaddress => rd_addr, wraddress => wr_addr, rdclock => clk, wrclock => clk, rden => rd_en, rdclken => one, wrclken => one, wren => wr_en, q => dout); end altera;