address_counter.vhd

用VHDL硬件描述语言实现的对FPGA（Cyclone II）的配置的VHDL源代码。

-- megafunction wizard: %LPM_COUNTER%
-- GENERATION: STANDARD
-- VERSION: WM1.0
-- MODULE: lpm_counter 

-- ============================================================
-- File Name: address_counter.vhd
-- Megafunction Name(s):
-- 			lpm_counter
-- ============================================================
-- ************************************************************
-- THIS IS A WIZARD-GENERATED FILE. DO NOT EDIT THIS FILE!
--
-- 4.2 Build 157 12/07/2004 SJ Full Version
-- ************************************************************


--Copyright (C) 1991-2004 Altera Corporation
--Any  megafunction  design,  and related netlist (encrypted  or  decrypted),
--support information,  device programming or simulation file,  and any other
--associated  documentation or information  provided by  Altera  or a partner
--under  Altera's   Megafunction   Partnership   Program  may  be  used  only
--to program  PLD  devices (but not masked  PLD  devices) from  Altera.   Any
--other  use  of such  megafunction  design,  netlist,  support  information,
--device programming or simulation file,  or any other  related documentation
--or information  is prohibited  for  any  other purpose,  including, but not
--limited to  modification,  reverse engineering,  de-compiling, or use  with
--any other  silicon devices,  unless such use is  explicitly  licensed under
--a separate agreement with  Altera  or a megafunction partner.  Title to the
--intellectual property,  including patents,  copyrights,  trademarks,  trade
--secrets,  or maskworks,  embodied in any such megafunction design, netlist,
--support  information,  device programming or simulation file,  or any other
--related documentation or information provided by  Altera  or a megafunction
--partner, remains with Altera, the megafunction partner, or their respective
--licensors. No other licenses, including any licenses needed under any third
--party's intellectual property, are provided herein.


LIBRARY ieee;
USE ieee.std_logic_1164.all;

LIBRARY lpm;
USE lpm.lpm_components.all;

ENTITY address_counter IS
	PORT
	(
		clock		: IN STD_LOGIC ;
		clk_en		: IN STD_LOGIC ;
		cnt_en		: IN STD_LOGIC ;
		aclr		: IN STD_LOGIC ;
		q		: OUT STD_LOGIC_VECTOR (19 DOWNTO 0);
		cout		: OUT STD_LOGIC 
	);
END address_counter;


ARCHITECTURE SYN OF address_counter IS

	SIGNAL sub_wire0	: STD_LOGIC ;
	SIGNAL sub_wire1	: STD_LOGIC_VECTOR (19 DOWNTO 0);



	COMPONENT lpm_counter
	GENERIC (
		lpm_width		: NATURAL;
		lpm_type		: STRING;
		lpm_direction		: STRING
	);
	PORT (
			clk_en	: IN STD_LOGIC ;
			aclr	: IN STD_LOGIC ;
			clock	: IN STD_LOGIC ;
			cout	: OUT STD_LOGIC ;
			q	: OUT STD_LOGIC_VECTOR (19 DOWNTO 0);
			cnt_en	: IN STD_LOGIC 
	);
	END COMPONENT;

BEGIN
	cout    <= sub_wire0;
	q    <= sub_wire1(19 DOWNTO 0);

	lpm_counter_component : lpm_counter
	GENERIC MAP (
		lpm_width => 20,
		lpm_type => "LPM_COUNTER",
		lpm_direction => "UP"
	)
	PORT MAP (
		clk_en => clk_en,
		aclr => aclr,
		clock => clock,
		cnt_en => cnt_en,
		cout => sub_wire0,
		q => sub_wire1
	);



END SYN;

-- ============================================================
-- CNX file retrieval info
-- ============================================================
-- Retrieval info: PRIVATE: nBit NUMERIC "20"
-- Retrieval info: PRIVATE: Direction NUMERIC "0"
-- Retrieval info: PRIVATE: CLK_EN NUMERIC "1"
-- Retrieval info: PRIVATE: CNT_EN NUMERIC "1"
-- Retrieval info: PRIVATE: ModulusCounter NUMERIC "0"
-- Retrieval info: PRIVATE: ModulusValue NUMERIC "0"
-- Retrieval info: PRIVATE: CarryIn NUMERIC "0"
-- Retrieval info: PRIVATE: CarryOut NUMERIC "1"
-- Retrieval info: PRIVATE: SCLR NUMERIC "0"
-- Retrieval info: PRIVATE: SLOAD NUMERIC "0"
-- Retrieval info: PRIVATE: SSET NUMERIC "0"
-- Retrieval info: PRIVATE: SSET_ALL1 NUMERIC "1"
-- Retrieval info: PRIVATE: SSETV NUMERIC "0"
-- Retrieval info: PRIVATE: ACLR NUMERIC "1"
-- Retrieval info: PRIVATE: ALOAD NUMERIC "0"
-- Retrieval info: PRIVATE: ASET NUMERIC "0"
-- Retrieval info: PRIVATE: ASET_ALL1 NUMERIC "1"
-- Retrieval info: PRIVATE: ASETV NUMERIC "0"
-- Retrieval info: CONSTANT: LPM_WIDTH NUMERIC "20"
-- Retrieval info: CONSTANT: LPM_TYPE STRING "LPM_COUNTER"
-- Retrieval info: CONSTANT: LPM_DIRECTION STRING "UP"
-- Retrieval info: USED_PORT: clock 0 0 0 0 INPUT NODEFVAL clock
-- Retrieval info: USED_PORT: q 0 0 20 0 OUTPUT NODEFVAL q[19..0]
-- Retrieval info: USED_PORT: clk_en 0 0 0 0 INPUT NODEFVAL clk_en
-- Retrieval info: USED_PORT: cnt_en 0 0 0 0 INPUT NODEFVAL cnt_en
-- Retrieval info: USED_PORT: cout 0 0 0 0 OUTPUT NODEFVAL cout
-- Retrieval info: USED_PORT: aclr 0 0 0 0 INPUT NODEFVAL aclr
-- Retrieval info: CONNECT: @clock 0 0 0 0 clock 0 0 0 0
-- Retrieval info: CONNECT: q 0 0 20 0 @q 0 0 20 0
-- Retrieval info: CONNECT: @clk_en 0 0 0 0 clk_en 0 0 0 0
-- Retrieval info: CONNECT: @cnt_en 0 0 0 0 cnt_en 0 0 0 0
-- Retrieval info: CONNECT: cout 0 0 0 0 @cout 0 0 0 0
-- Retrieval info: CONNECT: @aclr 0 0 0 0 aclr 0 0 0 0
-- Retrieval info: LIBRARY: lpm lpm.lpm_components.all
-- Retrieval info: GEN_FILE: TYPE_NORMAL address_counter.vhd TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL address_counter.inc FALSE
-- Retrieval info: GEN_FILE: TYPE_NORMAL address_counter.cmp TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL address_counter.bsf FALSE
-- Retrieval info: GEN_FILE: TYPE_NORMAL address_counter_inst.vhd FALSE
-- Retrieval info: GEN_FILE: TYPE_NORMAL address_counter_waveforms.html TRUE
-- Retrieval info: GEN_FILE: TYPE_NORMAL address_counter_wave*.jpg FALSE