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MaxOutputPinsPerModule.vhd
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library IEEE;
use IEEE.std_logic_1164.all; -- defines std_logic types
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
-- Copyright (C) 2007, Peter C. Wallace, Mesa Electronics
-- http://www.mesanet.com
--
-- This program is is licensed under a disjunctive dual license giving you
-- the choice of one of the two following sets of free software/open source
-- licensing terms:
--
-- * GNU General Public License (GPL), version 2.0 or later
-- * 3-clause BSD License
--
--
-- The GNU GPL License:
--
-- 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 2 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
--
--
-- The 3-clause BSD License:
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- * Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- * Redistributions in binary form must reproduce the above
-- copyright notice, this list of conditions and the following
-- disclaimer in the documentation and/or other materials
-- provided with the distribution.
--
-- * Neither the name of Mesa Electronics nor the names of its
-- contributors may be used to endorse or promote products
-- derived from this software without specific prior written
-- permission.
--
--
-- Disclaimer:
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-- FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-- COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-- BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-- CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-- ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-- POSSIBILITY OF SUCH DAMAGE.
--
use work.IDROMConst.all;
package MaxOutputPinsPerModule is
function MaxOutputPinsPerModule(PD : PinDescType; Tag : std_logic_vector(7 downto 0)) return integer;
end MaxOutputPinsPerModule;
package body MaxOutputPinsPerModule is
function MaxOutputPinsPerModule(PD : PinDescType; Tag : std_logic_vector(7 downto 0)) return integer is
variable result: integer;
begin
result := 0;
for i in 0 to MaxPins-1 loop
if Tag = PD(i)(15 downto 8) then -- if GTag matches
if PD(i)(7) = '1' then -- and its an Output
if PD(i)(5 downto 0) > result then -- drop MSB and NMSB to allow 2 Output types
result := conv_integer(PD(i)(5 downto 0)); -- find max (63 max)
end if;
end if;
end if;
end loop;
return result;
end;
end MaxOutputPinsPerModule;