-------------------------------------------------------------------------------
|
-------------------------------------------------------------------------------
|
--
|
--
|
-- The L port controller.
|
-- The L port controller.
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--
|
--
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-- $Id: t400_io_l.vhd,v 1.4 2006-06-05 20:33:24 arniml Exp $
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-- $Id: t400_io_l.vhd 179 2009-04-01 19:48:38Z arniml $
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--
|
--
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-- Copyright (c) 2006 Arnim Laeuger (arniml@opencores.org)
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-- Copyright (c) 2006 Arnim Laeuger (arniml@opencores.org)
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--
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--
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-- All rights reserved
|
-- All rights reserved
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--
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--
|
-- Redistribution and use in source and synthezised forms, with or without
|
-- Redistribution and use in source and synthezised forms, with or without
|
-- modification, are permitted provided that the following conditions are met:
|
-- modification, are permitted provided that the following conditions are met:
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--
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--
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-- Redistributions of source code must retain the above copyright notice,
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-- Redistributions of source code must retain the above copyright notice,
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-- this list of conditions and the following disclaimer.
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-- this list of conditions and the following disclaimer.
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--
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--
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-- Redistributions in synthesized form must reproduce the above copyright
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-- Redistributions in synthesized form must reproduce the above copyright
|
-- notice, this list of conditions and the following disclaimer in the
|
-- notice, this list of conditions and the following disclaimer in the
|
-- documentation and/or other materials provided with the distribution.
|
-- documentation and/or other materials provided with the distribution.
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--
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--
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-- Neither the name of the author nor the names of other contributors may
|
-- Neither the name of the author nor the names of other contributors may
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-- be used to endorse or promote products derived from this software without
|
-- be used to endorse or promote products derived from this software without
|
-- specific prior written permission.
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-- specific prior written permission.
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--
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--
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-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
-- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
|
-- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
|
-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
-- POSSIBILITY OF SUCH DAMAGE.
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-- POSSIBILITY OF SUCH DAMAGE.
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--
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--
|
-- Please report bugs to the author, but before you do so, please
|
-- Please report bugs to the author, but before you do so, please
|
-- make sure that this is not a derivative work and that
|
-- make sure that this is not a derivative work and that
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-- you have the latest version of this file.
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-- you have the latest version of this file.
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--
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--
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-- The latest version of this file can be found at:
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-- The latest version of this file can be found at:
|
-- http://www.opencores.org/cvsweb.shtml/t400/
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-- http://www.opencores.org/cvsweb.shtml/t400/
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--
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--
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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|
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library ieee;
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_1164.all;
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|
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use work.t400_opt_pack.all;
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use work.t400_opt_pack.all;
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use work.t400_pack.all;
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use work.t400_pack.all;
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|
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entity t400_io_l is
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entity t400_io_l is
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|
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generic (
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generic (
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opt_out_type_7_g : integer := t400_opt_out_type_std_c;
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opt_out_type_7_g : integer := t400_opt_out_type_std_c;
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opt_out_type_6_g : integer := t400_opt_out_type_std_c;
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opt_out_type_6_g : integer := t400_opt_out_type_std_c;
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opt_out_type_5_g : integer := t400_opt_out_type_std_c;
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opt_out_type_5_g : integer := t400_opt_out_type_std_c;
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opt_out_type_4_g : integer := t400_opt_out_type_std_c;
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opt_out_type_4_g : integer := t400_opt_out_type_std_c;
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opt_out_type_3_g : integer := t400_opt_out_type_std_c;
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opt_out_type_3_g : integer := t400_opt_out_type_std_c;
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opt_out_type_2_g : integer := t400_opt_out_type_std_c;
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opt_out_type_2_g : integer := t400_opt_out_type_std_c;
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opt_out_type_1_g : integer := t400_opt_out_type_std_c;
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opt_out_type_1_g : integer := t400_opt_out_type_std_c;
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opt_out_type_0_g : integer := t400_opt_out_type_std_c;
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opt_out_type_0_g : integer := t400_opt_out_type_std_c;
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opt_microbus_g : integer := t400_opt_no_microbus_c
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opt_microbus_g : integer := t400_opt_no_microbus_c
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);
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);
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port (
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port (
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-- System Interface -------------------------------------------------------
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-- System Interface -------------------------------------------------------
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ck_i : in std_logic;
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ck_i : in std_logic;
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ck_en_i : in boolean;
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ck_en_i : in boolean;
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por_i : in boolean;
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por_i : in boolean;
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in_en_i : in boolean;
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in_en_i : in boolean;
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-- Control Interface ------------------------------------------------------
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-- Control Interface ------------------------------------------------------
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op_i : in io_l_op_t;
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op_i : in io_l_op_t;
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en2_i : in std_logic;
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en2_i : in std_logic;
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m_i : in dw_t;
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m_i : in dw_t;
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a_i : in dw_t;
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a_i : in dw_t;
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pm_data_i : in byte_t;
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pm_data_i : in byte_t;
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q_o : out byte_t;
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q_o : out byte_t;
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-- Microbus Interface -----------------------------------------------------
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-- Microbus Interface -----------------------------------------------------
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cs_n_i : in std_logic;
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cs_n_i : in std_logic;
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rd_n_i : in std_logic;
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rd_n_i : in std_logic;
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wr_n_i : in std_logic;
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wr_n_i : in std_logic;
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-- Port L Interface -------------------------------------------------------
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-- Port L Interface -------------------------------------------------------
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io_l_i : in byte_t;
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io_l_i : in byte_t;
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io_l_o : out byte_t;
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io_l_o : out byte_t;
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io_l_en_o : out byte_t
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io_l_en_o : out byte_t
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);
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);
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end t400_io_l;
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end t400_io_l;
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use work.t400_io_pack.all;
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use work.t400_io_pack.all;
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|
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architecture rtl of t400_io_l is
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architecture rtl of t400_io_l is
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|
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signal q_q : byte_t;
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signal q_q : byte_t;
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|
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signal en2_s : std_logic;
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signal en2_s : std_logic;
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begin
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begin
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-----------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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-- Process q_reg
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-- Process q_reg
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--
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--
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-- Purpose:
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-- Purpose:
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-- Implements the Q register.
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-- Implements the Q register.
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--
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--
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q_reg: process (ck_i, por_i)
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q_reg: process (ck_i, por_i)
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begin
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begin
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if por_i then
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if por_i then
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q_q <= (others => '0');
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q_q <= (others => '0');
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elsif ck_i'event and ck_i = '1' then
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elsif ck_i'event and ck_i = '1' then
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if ck_en_i then
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if ck_en_i then
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case op_i is
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case op_i is
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-- Load Q from accumulator and data memory --------------------------
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-- Load Q from accumulator and data memory --------------------------
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when IOL_LOAD_AM =>
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when IOL_LOAD_AM =>
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q_q(7 downto 4) <= a_i;
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q_q(7 downto 4) <= a_i;
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q_q(3 downto 0) <= m_i;
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q_q(3 downto 0) <= m_i;
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|
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-- Load Q from program memory ---------------------------------------
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-- Load Q from program memory ---------------------------------------
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when IOL_LOAD_PM =>
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when IOL_LOAD_PM =>
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q_q <= pm_data_i;
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q_q <= pm_data_i;
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|
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when others =>
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when others =>
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null;
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null;
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end case;
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end case;
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end if;
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end if;
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-- Microbus functionality
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-- Microbus functionality
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if opt_microbus_g = t400_opt_microbus_c and
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if opt_microbus_g = t400_opt_microbus_c and
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cs_n_i = '0' and wr_n_i = '0' then
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cs_n_i = '0' and wr_n_i = '0' then
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q_q <= to_X01(io_l_i);
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q_q <= to_X01(io_l_i);
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end if;
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end if;
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end if;
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end if;
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end process q_reg;
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end process q_reg;
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--
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--
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-----------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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|
|
|
|
-----------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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-- Multiplexer providing read data to the system.
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-- Multiplexer providing read data to the system.
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-----------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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q_o <= to_X01(io_l_i)
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q_o <= to_X01(io_l_i)
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when op_i = IOL_OUTPUT_L else
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when op_i = IOL_OUTPUT_L else
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q_q;
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q_q;
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|
|
|
|
-----------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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-- Dedicated output enable when in Microbus mode
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-- Dedicated output enable when in Microbus mode
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-----------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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en2_s <= cs_n_i nor rd_n_i
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en2_s <= cs_n_i nor rd_n_i
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when opt_microbus_g = t400_opt_microbus_c else
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when opt_microbus_g = t400_opt_microbus_c else
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en2_i;
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en2_i;
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|
|
-----------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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-- Process out_driver
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-- Process out_driver
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--
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--
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-- Purpose:
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-- Purpose:
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-- Implements the output driver data and enable.
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-- Implements the output driver data and enable.
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--
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--
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out_driver: process (en2_s,
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out_driver: process (en2_s,
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q_q)
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q_q)
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begin
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begin
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-- bit 7
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-- bit 7
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io_l_o(7) <= io_out_f(dat => q_q(7),
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io_l_o(7) <= io_out_f(dat => q_q(7),
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opt => opt_out_type_7_g);
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opt => opt_out_type_7_g);
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io_l_en_o(7) <= io_en_f (en => en2_s, dat => q_q(7),
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io_l_en_o(7) <= io_en_f (en => en2_s, dat => q_q(7),
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opt => opt_out_type_7_g);
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opt => opt_out_type_7_g);
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|
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-- bit 6
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-- bit 6
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io_l_o(6) <= io_out_f(dat => q_q(6),
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io_l_o(6) <= io_out_f(dat => q_q(6),
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opt => opt_out_type_6_g);
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opt => opt_out_type_6_g);
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io_l_en_o(6) <= io_en_f (en => en2_s, dat => q_q(6),
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io_l_en_o(6) <= io_en_f (en => en2_s, dat => q_q(6),
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opt => opt_out_type_6_g);
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opt => opt_out_type_6_g);
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|
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-- bit 5
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-- bit 5
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io_l_o(5) <= io_out_f(dat => q_q(5),
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io_l_o(5) <= io_out_f(dat => q_q(5),
|
opt => opt_out_type_5_g);
|
opt => opt_out_type_5_g);
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io_l_en_o(5) <= io_en_f (en => en2_s, dat => q_q(5),
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io_l_en_o(5) <= io_en_f (en => en2_s, dat => q_q(5),
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opt => opt_out_type_5_g);
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opt => opt_out_type_5_g);
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|
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-- bit 4
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-- bit 4
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io_l_o(4) <= io_out_f(dat => q_q(4),
|
io_l_o(4) <= io_out_f(dat => q_q(4),
|
opt => opt_out_type_4_g);
|
opt => opt_out_type_4_g);
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io_l_en_o(4) <= io_en_f (en => en2_s, dat => q_q(4),
|
io_l_en_o(4) <= io_en_f (en => en2_s, dat => q_q(4),
|
opt => opt_out_type_4_g);
|
opt => opt_out_type_4_g);
|
|
|
-- bit 3
|
-- bit 3
|
io_l_o(3) <= io_out_f(dat => q_q(3),
|
io_l_o(3) <= io_out_f(dat => q_q(3),
|
opt => opt_out_type_3_g);
|
opt => opt_out_type_3_g);
|
io_l_en_o(3) <= io_en_f (en => en2_s, dat => q_q(3),
|
io_l_en_o(3) <= io_en_f (en => en2_s, dat => q_q(3),
|
opt => opt_out_type_3_g);
|
opt => opt_out_type_3_g);
|
|
|
-- bit 2
|
-- bit 2
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io_l_o(2) <= io_out_f(dat => q_q(2),
|
io_l_o(2) <= io_out_f(dat => q_q(2),
|
opt => opt_out_type_2_g);
|
opt => opt_out_type_2_g);
|
io_l_en_o(2) <= io_en_f (en => en2_s, dat => q_q(2),
|
io_l_en_o(2) <= io_en_f (en => en2_s, dat => q_q(2),
|
opt => opt_out_type_2_g);
|
opt => opt_out_type_2_g);
|
|
|
-- bit 1
|
-- bit 1
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io_l_o(1) <= io_out_f(dat => q_q(1),
|
io_l_o(1) <= io_out_f(dat => q_q(1),
|
opt => opt_out_type_1_g);
|
opt => opt_out_type_1_g);
|
io_l_en_o(1) <= io_en_f (en => en2_s, dat => q_q(1),
|
io_l_en_o(1) <= io_en_f (en => en2_s, dat => q_q(1),
|
opt => opt_out_type_1_g);
|
opt => opt_out_type_1_g);
|
|
|
-- bit 0
|
-- bit 0
|
io_l_o(0) <= io_out_f(dat => q_q(0),
|
io_l_o(0) <= io_out_f(dat => q_q(0),
|
opt => opt_out_type_0_g);
|
opt => opt_out_type_0_g);
|
io_l_en_o(0) <= io_en_f (en => en2_s, dat => q_q(0),
|
io_l_en_o(0) <= io_en_f (en => en2_s, dat => q_q(0),
|
opt => opt_out_type_0_g);
|
opt => opt_out_type_0_g);
|
|
|
end process out_driver;
|
end process out_driver;
|
--
|
--
|
-----------------------------------------------------------------------------
|
-----------------------------------------------------------------------------
|
|
|
end rtl;
|
end rtl;
|
|
|
|
|
-------------------------------------------------------------------------------
|
|
-- File History:
|
|
--
|
|
-- $Log: not supported by cvs2svn $
|
|
-- Revision 1.3 2006/06/05 14:21:21 arniml
|
|
-- latch io_l_i upon input enable trigger
|
|
--
|
|
-- Revision 1.2 2006/05/23 01:14:28 arniml
|
|
-- use to_X01 for primary input bus
|
|
--
|
|
-- Revision 1.1.1.1 2006/05/06 01:56:44 arniml
|
|
-- import from local CVS repository, LOC_CVS_0_1
|
|
--
|
|
-------------------------------------------------------------------------------
|
|
|
|
No newline at end of file
|
No newline at end of file
|