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URL https://opencores.org/ocsvn/open_hitter/open_hitter/trunk

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  • This comparison shows the changes necessary to convert path 
    /open_hitter/trunk/rtl
    from Rev 11 to Rev 12
    ↔ Reverse comparison
  •

Rev 11 → Rev 12

/vhdl/search_item.vhd
53,6 → 53,7
--//
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.ALL;
 
entity search_item is
port (
60,12 → 61,12
-- control flag(s) on the incoming bus
b1_px_valid: in std_logic;
-- pxdata: in price_packet
b1_px_type: out std_logic_vector(4 downto 0);
b1_buy_sell: out std_logic_vector(2 downto 0); -- 111 buy, 000 sell
b1_px: out std_logic_vector(15 downto 0); -- price
b1_qty: out std_logic_vector(15 downto 0); -- quantity
b1_sec: out std_logic_vector(55 downto 0); -- 7x 8bits securities identifier
b1_id: out std_logic_vector(15 downto 0); -- unique/identifier/counter
b1_px_type: in std_logic_vector(4 downto 0);
b1_buy_sell: in std_logic_vector(2 downto 0); -- 111 buy, 000 sell
b1_px: in std_logic_vector(15 downto 0); -- price
b1_qty: in std_logic_vector(15 downto 0); -- quantity
b1_sec: in std_logic_vector(55 downto 0); -- 7x 8bits securities identifier
b1_id: in std_logic_vector(15 downto 0); -- unique/identifier/counter
-- pxdata: out price_packet
b2_px_type: out std_logic_vector(4 downto 0);
b2_buy_sell: out std_logic_vector(2 downto 0); -- 111 buy, 000 sell
72,7 → 73,7
b2_px: out std_logic_vector(15 downto 0); -- price
b2_qty: out std_logic_vector(15 downto 0); -- quantity
b2_sec: out std_logic_vector(55 downto 0); -- 7x 8bits securities identifier
b2_id: out std_logic_vector(15 downto 0); -- unique/identifier/counter
b2_id: out std_logic_vector(15 downto 0) -- unique/identifier/counter
);
end search_item;
 
89,10 → 90,9
match: process (RX_CLK) is
begin
if rising_edge(RX_CLK) then
if b1_px_valid then
if b1_px_valid = '0' then
 
case b1_px_type is
when '0000' =>
if b1_px_type = std_logic_vector'("0000") then
-- do reset store and outputs
store_px_type <= (others => '0');
store_buy_sell <= (others => '0'); -- 111 buy, 000 sell
108,10 → 108,10
b2_sec <= (others => 'Z'); -- 7x 8bits securities identifier
b2_id <= (others => 'Z'); -- unique/identifier/counter
--
b2_px_type <== '0000';
b2_px_type <= std_logic_vector'(std_logic_vector'("0000"));
state <= 8;
 
when '0110' =>
elsif b1_px_type = std_logic_vector'("0110") then
-- do set store from incoming price
store_px_type <= b1_px_type;
store_buy_sell <= b1_buy_sell;
120,35 → 120,47
store_sec <= b1_sec;
store_id <= b1_id;
--
b2_px_type <== '0000';
b2_px_type <= std_logic_vector'(std_logic_vector'("0000"));
state <= 8;
 
when '0101' =>
elsif b1_px_type = std_logic_vector'("0101") then
-- incoming price, register it and start the state machine
if (store_sec != b1_sec or store_buy_sell == b1_buy_sell or store_px_type != '0110')
if (store_sec /= b1_sec or store_buy_sell = b1_buy_sell or store_px_type /= std_logic_vector'(std_logic_vector'("0110")) ) then
-- not this store_item instance no action, also stop anything that might be going on
state <= 14;
elsif (store_qty == 0 or b1_qty == 0 or
(store_buy_sell == '111' and store_px < b1_px) or
(store_buy_sell == '000' and store_px > b1_px) )
elsif (to_integer(unsigned(store_qty)) = 0 or to_integer(unsigned(b1_qty)) = 0 or
(store_buy_sell = std_logic_vector'("111") and store_px < b1_px) or
(store_buy_sell = std_logic_vector'("000") and store_px > b1_px) ) then
-- no deal: this is the correct store_item but there's no match
b2_px_type <== '0000';
b2_px_type <= std_logic_vector'(std_logic_vector'("0000"));
state <= 8;
else
-- send a return order
b2_px_type <= '1010';
b2_px_type <= std_logic_vector'("1010");
b2_buy_sell <= store_buy_sell; -- 111 buy, 000 sell
b2_px <= b1_px; -- price
b2_qty <= b1_qty when (b1_qty < store_qty) else store_qty; -- quantity
b2_sec <= store_sec: -- 7x 8bits securities identifier
-- b2_qty <=
if b1_qty < store_qty then
b2_qty <= b1_qty;
else
b2_qty <= store_qty;
end if; -- quantity
b2_sec <= store_sec; -- 7x 8bits securities identifier
b2_id <= store_id; -- unique/identifier/counter
-- update the store
store_qty <= (store_qty-b1_qty) when (b1_qty < store_qty) else 0;
state <= 1;
-- store_qty
if (b1_qty < store_qty) then
store_qty <= std_logic_vector(to_unsigned( to_integer(unsigned(store_qty)) - to_integer(unsigned(b1_qty)) ,16 ));
else
store_qty <= (others => '0');
state <= 1;
end if;
end if;
 
when others => null;
end case; -- b1_px_type
else
-- no action
null;
end if; -- b1_px_type
 
else -- b1_px_valid
-- no incoming b1_px so check for state machine actions
160,12 → 172,12
b2_px <= (others => 'Z'); -- price
b2_qty <= (others => 'Z'); -- quantity
b2_sec <= (others => 'Z'); -- 7x 8bits securities identifier
b2_id <= (others => 'Z'): -- unique/identifier/counter
b2_id <= (others => 'Z'); -- unique/identifier/counter
state <= 16;
 
when 8 =>
-- correct store_item but there was no match
b2_px_type <== 'ZZZZ';
b2_px_type <= std_logic_vector'("ZZZZ");
state <= 16;
 
when others => null;

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