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--

-- PIC16xx compatible microcontroller core

--

-- Version : 0224

--

-- Copyright (c) 2001-2002 Daniel Wallner (jesus@opencores.org)

--

-- All rights reserved

--

-- Redistribution and use in source and synthezised 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 synthesized 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 the author nor the names of other contributors may

-- be used to endorse or promote products derived from this software without

-- specific prior written permission.

--

-- 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 AUTHOR 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.

--

-- Please report bugs to the author, but before you do so, please

-- make sure that this is not a derivative work and that

-- you have the latest version of this file.

--

-- The latest version of this file can be found at:

--      http://www.opencores.org/cvsweb.shtml/ppx16/

--

-- Limitations :

--

-- File history :

--

library IEEE;

use IEEE.std_logic_1164.all;

package PPX_Pack is

        component PPX_ALU

        generic(

                InstructionLength : integer

        );

        port (

                Clk                     : in std_logic;

                ROM_Data        : in std_logic_vector(InstructionLength - 1 downto 0);

                A                       : in std_logic_vector(7 downto 0);

                B                       : in std_logic_vector(7 downto 0);

                Q                       : out std_logic_vector(7 downto 0);

                Skip            : in std_logic;

                Carry           : in std_logic;

                Z_Skip          : out std_logic;

                STATUS_d        : out std_logic_vector(2 downto 0);

                STATUS_Wr       : out std_logic_vector(2 downto 0)

        );

        end component;

        component PPX_Ctrl

        generic(

                InstructionLength : integer

        );

        port(

                Clk                     : in std_logic;

                Reset_n                 : in std_logic;

                ROM_Data        : in std_logic_vector(InstructionLength - 1 downto 0);

                Inst            : in std_logic_vector(InstructionLength - 1 downto 0);

                Skip            : in std_logic;

                File_Wr         : out std_logic;

                W_Wr            : out std_logic;

                Imm_Op          : out std_logic;

                A2Res           : out std_logic;

                B2Res           : out std_logic;

                Push            : out std_logic;

                Pop                     : out std_logic;

                Goto            : out std_logic;

                IRet            : out std_logic;

                B_Skip          : out std_logic;

                Sleep           : out std_logic

        );

        end component;

        component PPX_PCS

        generic(

                PC_Width                : integer;

                StackAddrWidth  : integer;

                TopBoot                 : boolean

        );

        port(

                Clk                             : in std_logic;

                Reset_n                 : in std_logic;

                CS                              : in std_logic;

                Wr                              : in std_logic;

                Data_In                 : in std_logic_vector(7 downto 0);

                Addr_In                 : in std_logic_vector(PC_Width - 3 downto 0);

                PCLATH                  : in std_logic_vector(4 downto 0);

                STATUS                  : in std_logic_vector(6 downto 5);

                NPC                             : out std_logic_vector(PC_Width - 1 downto 0);

                Int                             : in std_logic;

                Sleep                   : in std_logic;

                Push                    : in std_logic;

                Pop                             : in std_logic;

                Goto                    : in std_logic

        );

        end component;

        component PPX16

        generic(

                InstructionLength       : integer;

                ROMAddressWidth         : integer;

                StackAddrWidth          : integer;

                TopBoot                         : boolean

        );

        port(

                Clk                     : in std_logic;

                Reset_n         : in std_logic;

                ROM_Addr        : out std_logic_vector(ROMAddressWidth - 1 downto 0);

                ROM_Data        : in std_logic_vector(InstructionLength - 1 downto 0);

                Int_Trig        : in std_logic;

                GIE                     : in std_logic;

                Int_Acc         : out std_logic;

                Int_Ret         : out std_logic;

                File_Addr       : out std_logic_vector(InstructionLength - 6 downto 0);

                File_Addr_r     : out std_logic_vector(InstructionLength - 6 downto 0);

                File_Wr         : out std_logic;

                W_Wr            : out std_logic;

                Instruction     : out std_logic_vector(InstructionLength - 1 downto 0);

                Op_Bus          : in std_logic_vector(7 downto 0);

                W                       : out std_logic_vector(7 downto 0);

                STATUS          : out std_logic_vector(7 downto 0);

                FSR                     : out std_logic_vector(7 downto 0);

                PCLATH          : out std_logic_vector(4 downto 0);

                Res_Bus         : out std_logic_vector(7 downto 0)

        );

        end component;

        component PPX_RAM

        generic(

                Bottom          : integer;

                Top                     : integer;

                AddrWidth       : integer

        );

        port(

                Clk                     : in std_logic;

                CS                      : in std_logic;

                Wr                      : in std_logic;

                Addr            : in std_logic_vector(AddrWidth - 1 downto 0);

                Data_In         : in std_logic_vector(7 downto 0);

                Data_Out        : out std_logic_vector(7 downto 0)

        );

        end component;

        component PPX_Port

        port(

                Clk                     : in std_logic;

                Reset_n         : in std_logic;

                Port_Wr         : in std_logic;

                Tris_Wr         : in std_logic;

                Data_In         : in std_logic_vector(7 downto 0);

                Port_In         : out std_logic_vector(7 downto 0);

                Tris            : out std_logic_vector(7 downto 0);

                IOPort          : inout std_logic_vector(7 downto 0)

        );

        end component;

        component PPX_TMR

        port(

                Clk                     : in std_logic;

                Reset_n         : in std_logic;

                CKI                     : in std_logic;

                SE                      : in std_logic;

                CS                      : in std_logic;

                PS                      : in std_logic_vector(2 downto 0);

                PSA                     : in std_logic;

                TMR_Sel         : in std_logic;

                Wr                      : in std_logic;

                Data_In         : in std_logic_vector(7 downto 0);

                Data_Out        : out std_logic_vector(7 downto 0);

                TOF                     : out std_logic

        );

        end component;

end PPX_Pack;