| Line 1... |
Line 1... |
---------------------------------------------------------
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--===========================================================================--
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-- --
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-- Synthesizable PS/2 Keyboard Key map ROM for the Spartan 2 --
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-- --
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--===========================================================================--
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--
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--
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-- PS2 Keycode look up table
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-- File name : keymap_rom512_b4.vhd
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-- converts 7 bit key code to ASCII
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--
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-- Address bit 7 = CAPS Lock
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-- Entity name : keymap_rom
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--
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-- Purpose : PS/2 key code look up table for PS/2 Keyboard
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-- Converts 7 bit key code to ASCII
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-- Address bit 8 = Shift
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-- Address bit 8 = Shift
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-- Address bit 7 = CAPS Lock
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-- Address bits 6 - 0 = Key code
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-- Data bits 6 - 0 = ASCII code
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-- Designed for the Spartan 2
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--
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-- Dependencies : ieee.std_logic_1164
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-- ieee.std_logic_arith
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-- ieee.std_logic_unsigned
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--
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-- Uses : RAMB4_S8
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--
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-- Author : John E. Kent
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--
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-- Email : dilbert57@opencores.org
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--
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-- Web : http://opencores.org/project,system09
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--
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-- Copyright (C) 2004 - 2010 John Kent
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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--
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--===========================================================================--
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-- --
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-- Revision History --
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-- --
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--===========================================================================--
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--
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-- Version Date Author Changes
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-- 0.1 2004-10-18 John Kent Initial Version
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-- 0.2 2010-06-17 John Kent Added header, Rename data signals
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--
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--
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-- J.E.Kent
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-- 18th Oct 2004
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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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use IEEE.STD_LOGIC_ARITH.ALL;
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use IEEE.STD_LOGIC_ARITH.ALL;
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library unisim;
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library unisim;
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| Line 17... |
Line 63... |
entity keymap_rom is
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entity keymap_rom is
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Port (
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Port (
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clk : in std_logic;
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clk : in std_logic;
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rst : in std_logic;
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rst : in std_logic;
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cs : in std_logic;
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cs : in std_logic;
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rw : in std_logic;
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addr : in std_logic_vector (8 downto 0);
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addr : in std_logic_vector (8 downto 0);
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rdata : out std_logic_vector (7 downto 0);
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rw : in std_logic;
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wdata : in std_logic_vector (7 downto 0)
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data_in : in std_logic_vector (7 downto 0);
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data_out : out std_logic_vector (7 downto 0)
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);
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);
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end keymap_rom;
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end keymap_rom;
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architecture rtl of keymap_rom is
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architecture rtl of keymap_rom is
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|
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| Line 57... |
Line 103... |
clk => clk,
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clk => clk,
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en => cs,
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en => cs,
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we => we,
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we => we,
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rst => rst,
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rst => rst,
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addr => addr,
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addr => addr,
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di => wdata,
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di => data_in,
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do => rdata
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do => data_out
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);
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);
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my_keymap_rom : process ( rw )
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my_keymap_rom : process ( rw )
|
begin
|
begin
|
