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--////////////////////////////////////////////////////////////////////
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--// ////
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--// search_control.vhd ////
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--// ////
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--// This file is part of the open_hitter opencores effort. ////
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--// <http://www.opencores.org/cores/open_hitter/> ////
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--// ////
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--// Module Description: ////
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--// This is the multipelexed search's control item, used to set ////
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--// up, access and control the search. ////
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--// search_*_i - input to search_control ////
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--// order_*_o - output from search_control ////
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--// Buses perform the multiplex and are experienced by each item ////
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--// as b1_* - set by search_control, input to search_item ////
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--// b2_* - output from search_item, read by search_control ////
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--// The state machine in search_control coordinates the search, ////
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--// and the number of transitions is dependant on the incoming ////
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--// instruction (search_*_i). ////
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--// ////
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--// To Do: ////
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--// ////
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--// Author(s): ////
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--// - Stephen Hawes ////
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--// ////
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--////////////////////////////////////////////////////////////////////
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--// ////
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--// Copyright (C) 2015 Stephen Hawes and OPENCORES.ORG ////
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--// ////
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--// This source file may be used and distributed without ////
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--// restriction provided that this copyright statement is not ////
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--// removed from the file and that any derivative work contains ////
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--// the original copyright notice and the associated disclaimer. ////
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--// ////
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--// This source file is free software; you can redistribute it ////
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--// and/or modify it under the terms of the GNU Lesser General ////
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--// Public License as published by the Free Software Foundation; ////
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--// either version 2.1 of the License, or (at your option) any ////
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--// later version. ////
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--// ////
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--// This source is distributed in the hope that it will be ////
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--// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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--// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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--// PURPOSE. See the GNU Lesser General Public License for more ////
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--// details. ////
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--// ////
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--// You should have received a copy of the GNU Lesser General ////
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--// Public License along with this source; if not, download it ////
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--// from <http://www.opencores.org/lgpl.shtml> ////
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--// ////
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--////////////////////////////////////////////////////////////////////
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--//
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--// \$Id\$ TAKE OUT THE \'s and this comment in order to get this to work
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--//
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--// CVS Revision History
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--//
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--// \$Log\$ TAKE OUT THE \'s and this comment in order to get this to work
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--//
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.numeric_std.ALL;
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stvhawes |
--use std.textio.all; -- Imports the standard textio package.
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stvhawes |
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entity search_control is
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generic ( searchitems : integer );
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port (
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RX_CLK: in std_logic;
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-- control flag(s) on the incoming bus
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search_px_valid_i: in std_logic;
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-- pxdata: in price_packet
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search_px_type_i: in std_logic_vector(4 downto 0);
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search_buy_sell_i: in std_logic_vector(2 downto 0); -- 111 buy, 000 sell
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search_px_i: in std_logic_vector(15 downto 0); -- price
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search_qty_i: in std_logic_vector(15 downto 0); -- quantity
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search_sec_i: in std_logic_vector(55 downto 0); -- 7x 8bits securities identifier
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search_id_i: in std_logic_vector(15 downto 0); -- unique/identifier/counter
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-- pxdata: out price_packet
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order_px_type_o: out std_logic_vector(4 downto 0);
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order_buy_sell_o: out std_logic_vector(2 downto 0); -- 111 buy, 000 sell
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order_px_o: out std_logic_vector(15 downto 0); -- price
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order_qty_o: out std_logic_vector(15 downto 0); -- quantity
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order_sec_o: out std_logic_vector(55 downto 0); -- 7x 8bits securities identifier
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order_id_o: out std_logic_vector(15 downto 0); -- unique/identifier/counter
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-- control flag(s) on the outgoing bus
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order_px_valid_o: out std_logic
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);
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end search_control;
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architecture search_control_implementation of search_control is
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component search_item
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generic ( item_id: std_logic_vector(15 downto 0) );
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port (
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RX_CLK: in std_logic;
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-- control flag(s) on the incoming bus
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b1_px_valid: in std_logic;
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-- pxdata: in price_packet
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b1_px_type: in std_logic_vector(4 downto 0);
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b1_buy_sell: in std_logic_vector(2 downto 0); -- 111 buy, 000 sell
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b1_px: in std_logic_vector(15 downto 0); -- price
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b1_qty: in std_logic_vector(15 downto 0); -- quantity
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b1_sec: in std_logic_vector(55 downto 0); -- 7x 8bits securities identifier
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b1_id: in std_logic_vector(15 downto 0); -- unique/identifier/counter
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-- pxdata: out price_packet
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b2_px_type: out std_logic_vector(4 downto 0);
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b2_buy_sell: out std_logic_vector(2 downto 0); -- 111 buy, 000 sell
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b2_px: out std_logic_vector(15 downto 0); -- price
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b2_qty: out std_logic_vector(15 downto 0); -- quantity
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b2_sec: out std_logic_vector(55 downto 0); -- 7x 8bits securities identifier
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b2_id: out std_logic_vector(15 downto 0) -- unique/identifier/counter
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);
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end component;
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for search_item_1: search_item use entity work.search_item;
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signal searchitems_count : integer := 0;
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--
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signal state : integer range 0 to 16 := 16;
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--
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--signal RX_CLK: std_logic;
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-- pxdata: store price_packet
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signal store_px_type: std_logic_vector(4 downto 0) := (others => 'Z');
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signal store_buy_sell: std_logic_vector(2 downto 0) := (others => 'Z'); -- 111 buy, 000 sell
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signal store_px: std_logic_vector(15 downto 0) := (others => 'Z'); -- price
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signal store_qty: std_logic_vector(15 downto 0) := (others => 'Z'); -- quantity
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signal store_sec: std_logic_vector(55 downto 0) := (others => 'Z'); -- 7x 8bits securities identifier
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signal store_id: std_logic_vector(15 downto 0) := (others => 'Z'); -- unique/identifier/counter
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-- control flag(s) on the incoming bus
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signal b1_px_valid: std_logic;
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-- pxdata: b1 price_packet
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signal b1_px_type: std_logic_vector(4 downto 0) := (others => 'Z');
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signal b1_buy_sell: std_logic_vector(2 downto 0) := (others => 'Z'); -- 111 buy, 000 sell
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signal b1_px: std_logic_vector(15 downto 0) := (others => 'Z'); -- price
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signal b1_qty: std_logic_vector(15 downto 0) := (others => 'Z'); -- quantity
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signal b1_sec: std_logic_vector(55 downto 0) := (others => 'Z'); -- 7x 8bits securities identifier
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signal b1_id: std_logic_vector(15 downto 0) := (others => 'Z'); -- unique/identifier/counter
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-- pxdata: b2 price_packet
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signal b2_px_type: std_logic_vector(4 downto 0) := (others => 'Z');
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signal b2_buy_sell: std_logic_vector(2 downto 0) := (others => 'Z'); -- 111 buy, 000 sell
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signal b2_px: std_logic_vector(15 downto 0) := (others => 'Z'); -- price
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signal b2_qty: std_logic_vector(15 downto 0) := (others => 'Z'); -- quantity
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signal b2_sec: std_logic_vector(55 downto 0) := (others => 'Z'); -- 7x 8bits securities identifier
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signal b2_id: std_logic_vector(15 downto 0) := (others => 'Z'); -- unique/identifier/counter
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begin
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-- items_array : for iter_id in 0 to 5 generate -- searchitems - 1 generate
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-- begin
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-- cell_item: entity work.search_item
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search_item_1 : search_item
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-- generic map ( item_id => std_logic_vector'(X"0000")) -- std_logic_vector(to_unsigned(iter_id,16)) )
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generic map ( item_id => (others => '0')) -- std_logic_vector'(X"0000")) -- std_logic_vector(to_unsigned(iter_id,16)) )
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port map (
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RX_CLK => RX_CLK,
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b1_px_valid => b1_px_valid,
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b1_px_type => b1_px_type, b1_buy_sell => b1_buy_sell, b1_px => b1_px, b1_qty => b1_qty, b1_sec => b1_sec, b1_id => b1_id,
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b2_px_type => b2_px_type, b2_buy_sell => b2_buy_sell, b2_px => b2_px, b2_qty => b2_qty, b2_sec => b2_sec, b2_id => b2_id
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);
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-- end generate items_array;
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-- RX_CLK <= RX_CLK;
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match: process (RX_CLK) is
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-- variable l : line;
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begin
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--if rising_edge(RX_CLK) then
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if falling_edge(RX_CLK) then
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-- write (l, String'(" Rising Edge "));
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-- for j in b2_id'range loop
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-- write(l, std_logic'image(b2_id(j)) );
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-- end loop;
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-- writeline ( output, l);
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if search_px_valid_i = '1' then
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if search_px_type_i = std_logic_vector'("00000") then
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-- do reset store and outputs
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order_px_type_o <= (others => '0');
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order_buy_sell_o <= (others => 'Z'); -- 111 buy, 000 sell
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order_px_o <= (others => 'Z'); -- price
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order_qty_o <= (others => 'Z'); -- quantity
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order_sec_o <= (others => 'Z'); -- 7x 8bits securities identifier
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order_id_o <= (others => 'Z');
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order_px_valid_o <= '1';
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--
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b1_px_type <= (others => '0');
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b1_buy_sell <= (others => '0'); -- 111 buy, 000 sell
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b1_px <= (others => '0'); -- price
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b1_qty <= (others => '0'); -- quantity
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b1_sec <= (others => '0'); -- 7x 8bits securities identifier
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-- b1_id <= (others => '0'); -- unique/identifier/counter
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b1_px_valid <= '1';
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--
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searchitems_count <= 0;
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state <= 8;
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-- purely for test
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elsif search_px_type_i = std_logic_vector'("01010") then
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-- send the new security setting
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b1_px_type <= std_logic_vector'("01010");
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b1_buy_sell <= store_buy_sell;
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b1_px <= store_px;
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b1_qty <= store_qty;
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b1_sec <= store_sec;
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b1_id <= std_logic_vector'(X"0000"); -- std_logic_vector(to_unsigned(searchitems_count,16));
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b1_px_valid <= '1';
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state <= 4; -- increment items counter / send success
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-- write (l, String'(" State=6 "));
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-- for j in b2_id'range loop
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-- write(l, std_logic'image(b2_id(j)) );
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-- end loop;
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-- writeline (output, l);
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elsif search_px_type_i = std_logic_vector'("00110") then
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-- it's an incoming order price/qty security/buysell setting.
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-- do set bus b1 and store from incoming price
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b1_px_type <= search_px_type_i;
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b1_buy_sell <= search_buy_sell_i;
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b1_px <= search_px_i;
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b1_qty <= search_qty_i;
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b1_sec <= search_sec_i;
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b1_id <= (others => 'Z');
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b1_px_valid <= '1';
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-- do set store from incoming price
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store_px_type <= search_px_type_i;
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store_buy_sell <= search_buy_sell_i;
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store_px <= search_px_i;
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store_qty <= search_qty_i;
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store_sec <= search_sec_i;
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store_id <= search_id_i;
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--b2_px_type <= std_logic_vector'(std_logic_vector'("00000"));
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state <= 6;
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stvhawes |
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elsif search_px_type_i = std_logic_vector'("00101") then
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-- incoming price, register it and start the state machine
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if (store_sec /= b1_sec or store_buy_sell = b1_buy_sell or store_px_type /= std_logic_vector'(std_logic_vector'("0110")) ) then
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-- not this store_item instance no action, also stop anything that might be going on
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state <= 14;
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elsif (to_integer(unsigned(store_qty)) = 0 or to_integer(unsigned(b1_qty)) = 0 or
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(store_buy_sell = std_logic_vector'("111") and store_px < b1_px) or
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(store_buy_sell = std_logic_vector'("000") and store_px > b1_px) ) then
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-- no deal: this is the correct store_item but there's no match
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b2_px_type <= std_logic_vector'(std_logic_vector'("00000"));
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state <= 8;
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else
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-- send a return order
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b2_px_type <= std_logic_vector'("1010");
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b2_buy_sell <= store_buy_sell; -- 111 buy, 000 sell
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b2_px <= b1_px; -- price
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-- b2_qty <=
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if b1_qty < store_qty then
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b2_qty <= b1_qty;
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else
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b2_qty <= store_qty;
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end if; -- quantity
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b2_sec <= store_sec; -- 7x 8bits securities identifier
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b2_id <= store_id; -- unique/identifier/counter
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-- update the store
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-- store_qty
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if (b1_qty < store_qty) then
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store_qty <= std_logic_vector(to_unsigned( to_integer(unsigned(store_qty)) - to_integer(unsigned(b1_qty)) ,16 ));
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else
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store_qty <= (others => '0');
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state <= 1;
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end if;
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end if;
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else
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stvhawes |
-- no action - flash up Z's
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order_px_type_o <= (others => 'Z');
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order_buy_sell_o <= (others => 'Z'); -- 111 buy, 000 sell
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order_px_o <= (others => 'Z'); -- price
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order_qty_o <= (others => 'Z'); -- quantity
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order_sec_o <= (others => 'Z'); -- 7x 8bits securities identifier
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order_id_o <= (others => 'Z'); -- unique/identifier/counter
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order_px_valid_o <= '1';
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state <= 8;
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stvhawes |
end if; -- search_px_type
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else -- search_px_valid_i
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-- no incoming search_px_i so check for state machine actions
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case state is
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when 1 =>
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-- sent return order, so clean up
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stvhawes |
order_px_type_o <= (others => 'Z');
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order_buy_sell_o <= (others => 'Z'); -- 111 buy, 000 sell
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order_px_o <= (others => 'Z'); -- price
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order_qty_o <= (others => 'Z'); -- quantity
|
284 |
|
|
order_sec_o <= (others => 'Z'); -- 7x 8bits securities identifier
|
285 |
|
|
order_id_o <= (others => 'Z'); -- unique/identifier/counter
|
286 |
15 |
stvhawes |
state <= 16;
|
287 |
|
|
|
288 |
17 |
stvhawes |
when 6 =>
|
289 |
|
|
-- sent query to set px and qty for a given security
|
290 |
|
|
if b2_px_type = std_logic_vector'("00110") then
|
291 |
|
|
-- it's a known security and the value has been set
|
292 |
|
|
order_px_type_o <= b2_px_type;
|
293 |
|
|
order_px_valid_o <= '1';
|
294 |
|
|
state <= 8; -- reset next cycle
|
295 |
|
|
else
|
296 |
|
|
-- no response, it's a new security+buysell
|
297 |
|
|
if searchitems_count = searchitems-1 then
|
298 |
|
|
-- all search_items are filled - can't store this item
|
299 |
|
|
order_px_type_o <= std_logic_vector'("11111");
|
300 |
|
|
order_px_valid_o <= '1';
|
301 |
|
|
b1_px_valid <= '0';
|
302 |
|
|
state <= 8; -- reset next cycle
|
303 |
|
|
else
|
304 |
|
|
-- send the new security setting
|
305 |
|
|
b1_px_type <= std_logic_vector'("01010");
|
306 |
|
|
b1_buy_sell <= store_buy_sell;
|
307 |
|
|
b1_px <= store_px;
|
308 |
|
|
b1_qty <= store_qty;
|
309 |
|
|
b1_sec <= store_sec;
|
310 |
|
|
b1_id <= std_logic_vector'(X"0000"); -- std_logic_vector(to_unsigned(searchitems_count,16));
|
311 |
|
|
b1_px_valid <= '1';
|
312 |
|
|
state <= 4; -- increment items counter / send success
|
313 |
|
|
end if;
|
314 |
|
|
end if;
|
315 |
|
|
|
316 |
|
|
when 4 =>
|
317 |
|
|
-- have set a new item, increment count and return
|
318 |
|
|
searchitems_count <= searchitems_count + 1;
|
319 |
|
|
order_px_type_o <= std_logic_vector'("01010"); -- b2_px_type; --
|
320 |
|
|
order_buy_sell_o <= (others => 'Z');
|
321 |
|
|
order_px_o <= (others => 'Z');
|
322 |
|
|
order_qty_o <= (others => 'Z');
|
323 |
|
|
order_sec_o <= (others => 'Z');
|
324 |
|
|
order_id_o <= b2_id;
|
325 |
|
|
--
|
326 |
|
|
order_px_valid_o <= '1';
|
327 |
|
|
b1_px_valid <= '0';
|
328 |
|
|
state <= 8; -- reset next cycle
|
329 |
|
|
-- write (l, String'(" State=4 "));
|
330 |
|
|
-- for j in b2_id'range loop
|
331 |
|
|
-- write(l, std_logic'image(b2_id(j)) );
|
332 |
|
|
-- end loop;
|
333 |
|
|
-- writeline (output, l);
|
334 |
|
|
|
335 |
15 |
stvhawes |
when 8 =>
|
336 |
17 |
stvhawes |
-- correct store_item but there was no match
|
337 |
|
|
order_px_type_o <= std_logic_vector'("ZZZZZ");
|
338 |
|
|
order_px_valid_o <= '0';
|
339 |
|
|
-- reset b1
|
340 |
|
|
b1_px_type <= (others => 'Z');
|
341 |
|
|
b1_buy_sell <= (others => 'Z');
|
342 |
|
|
b1_px <= (others => 'Z');
|
343 |
|
|
b1_qty <= (others => 'Z');
|
344 |
|
|
b1_sec <= (others => 'Z');
|
345 |
|
|
b1_id <= (others => 'Z');
|
346 |
|
|
b1_px_valid <= '0';
|
347 |
|
|
--
|
348 |
15 |
stvhawes |
state <= 16;
|
349 |
|
|
|
350 |
|
|
when others => null;
|
351 |
|
|
end case; -- state
|
352 |
|
|
|
353 |
17 |
stvhawes |
-- if (state < 16) then
|
354 |
|
|
-- state <= state + 1;
|
355 |
|
|
-- end if;
|
356 |
15 |
stvhawes |
|
357 |
|
|
end if; -- search_px_valid_i
|
358 |
|
|
|
359 |
|
|
end if;
|
360 |
|
|
end process match;
|
361 |
|
|
|
362 |
17 |
stvhawes |
-- b1_id <= std_logic_vector'(X"1010"); -- testing
|
363 |
|
|
|
364 |
15 |
stvhawes |
end search_control_implementation;
|
365 |
|
|
|