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WatchFlag.vhd
80 lines | 2.7 KiB | text/x-vhdl | VhdlLexer
------------------------------------------------------------------------------
-- This file is a part of the LPP VHDL IP LIBRARY
-- Copyright (C) 2009 - 2012, 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 : Martin Morlot
-- Mail : martin.morlot@lpp.polytechnique.fr
------------------------------------------------------------------------------
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
entity WatchFlag is
port(
clk : in std_logic;
rstn : in std_logic;
EmptyF0a : in std_logic_vector(4 downto 0);
EmptyF0b : in std_logic_vector(4 downto 0);
EmptyF1 : in std_logic_vector(4 downto 0);
EmptyF2 : in std_logic_vector(4 downto 0);
DataCpt : out std_logic_vector(3 downto 0) -- f2 f1 f0b f0a
);
end entity;
architecture ar_WatchFlag of WatchFlag is
constant FlagSet : std_logic_vector(4 downto 0) := (others =>'1');
constant OneToSet : std_logic_vector(4 downto 0) := "01111";
begin
process(clk,rstn)
begin
if(rstn='0')then
DataCpt <= (others => '0');
elsif(clk'event and clk='1')then
if(EmptyF0a = OneToSet)then
DataCpt(0) <= '1';
elsif(EmptyF0a = FlagSet)then
DataCpt(0) <= '0';
end if;
if(EmptyF0b = OneToSet)then
DataCpt(1) <= '1';
elsif(EmptyF0b = FlagSet)then
DataCpt(1) <= '0';
end if;
if(EmptyF1 = OneToSet)then
DataCpt(2) <= '1';
elsif(EmptyF1 = FlagSet)then
DataCpt(2) <= '0';
end if;
if(EmptyF2 = OneToSet)then
DataCpt(3) <= '1';
elsif(EmptyF2 = FlagSet)then
DataCpt(3) <= '0';
end if;
end if;
end process;
end architecture;