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hack/src/ram4k_tb.vhdl

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-- (C) Copyright Collin J. Doering 2015
--
-- 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, see <http://www.gnu.org/licenses/>.
-- File: ram4k_tb.vhdl
-- Author: Collin J. Doering <collin.doering@rekahsoft.ca>
-- Date: May 22, 2015
library IEEE;
use IEEE.std_logic_1164.all;
-- A testbench has no ports.
entity ram4k_tb is
end ram4k_tb;
architecture ram4k_tb_arch of ram4k_tb is
-- Declaration of the component that will be instantiated.
component ram4k
port (d : in std_logic_vector(15 downto 0);
load : in std_logic;
address : in std_logic_vector(11 downto 0);
clk : in std_logic;
cout : out std_logic_vector(15 downto 0));
end component;
-- Declaration of the clock
component Clock
port (finish : in std_logic;
cout : out std_logic);
end component;
-- Specifies which entity is bound with the component.
for ram4k_0: ram4k use entity work.ram4k;
-- Signals
signal d, cout : std_logic_vector(15 downto 0);
signal address : std_logic_vector(11 downto 0);
signal load, finish, clk : std_logic;
begin
-- Component instantiation.
OSC_CLK: Clock port map (finish, clk);
ram4k_0: ram4k port map (d, load, address, clk, cout);
-- This process does the real job.
process
type pattern_type is record
-- The inputs of the ram4k.
d : std_logic_vector(15 downto 0);
load : std_logic;
address : std_logic_vector(11 downto 0);
-- The output of the ram4k.
cout : std_logic_vector(15 downto 0);
end record;
-- The patterns to apply.
type pattern_array is array (natural range <>) of pattern_type;
constant patterns : pattern_array :=
(("0000000000000000", '0', "000000000000", "0000000000000000"),
("0000000000000000", '0', "000000000000", "0000000000000000"),
("0000000000000000", '1', "000000000000", "0000000000000000"),
("0000000000000000", '1', "000000000000", "0000000000000000"),
("0000010001010111", '0', "000000000000", "0000000000000000"),
("0000010001010111", '0', "000000000000", "0000000000000000"),
("0000010001010111", '1', "010001010111", "0000000000000000"),
("0000010001010111", '1', "010001010111", "0000010001010111"),
("0000010001010111", '0', "000000000000", "0000000000000000"),
("0000010001010111", '0', "000000000000", "0000000000000000"),
("0000110110111001", '0', "110110111001", "0000000000000000"),
("0000110110111001", '0', "110110111001", "0000000000000000"),
("0000110110111001", '1', "110110111001", "0000000000000000"),
("0000110110111001", '1', "110110111001", "0000110110111001"),
("0000110110111001", '0', "110110111001", "0000110110111001"),
("0000110110111001", '0', "110110111001", "0000110110111001"),
("0000110110111001", '0', "010001010111", "0000010001010111"),
("0000111111111111", '0', "010001010111", "0000010001010111"),
("0000111111111111", '0', "010001010111", "0000010001010111"),
("0000111111111111", '1', "111111111111", "0000000000000000"),
("0000111111111111", '1', "111111111111", "0000111111111111"),
("0000111111111111", '0', "111111111111", "0000111111111111"),
("0000111111111111", '0', "111111111111", "0000111111111111"),
("0000111111111111", '0', "110110111001", "0000110110111001"),
("0000111111111111", '0', "111111111111", "0000111111111111"),
("0000111111111111", '0', "101010101000", "0000000000000000"),
("0000111111111111", '0', "101010101000", "0000000000000000"),
("0000111111111111", '0', "101010101001", "0000000000000000"),
("0000111111111111", '0', "101010101010", "0000000000000000"),
("0000111111111111", '0', "101010101011", "0000000000000000"),
("0000111111111111", '0', "101010101100", "0000000000000000"),
("0000111111111111", '0', "101010101101", "0000000000000000"),
("0000111111111111", '0', "101010101110", "0000000000000000"),
("0000111111111111", '0', "101010101111", "0000000000000000"),
("0101010101010101", '1', "101010101000", "0000000000000000"),
("0101010101010101", '1', "101010101000", "0101010101010101"),
("0101010101010101", '1', "101010101001", "0000000000000000"),
("0101010101010101", '1', "101010101001", "0101010101010101"),
("0101010101010101", '1', "101010101010", "0000000000000000"),
("0101010101010101", '1', "101010101010", "0101010101010101"),
("0101010101010101", '1', "101010101011", "0000000000000000"),
("0101010101010101", '1', "101010101011", "0101010101010101"),
("0101010101010101", '1', "101010101100", "0000000000000000"),
("0101010101010101", '1', "101010101100", "0101010101010101"),
("0101010101010101", '1', "101010101101", "0000000000000000"),
("0101010101010101", '1', "101010101101", "0101010101010101"),
("0101010101010101", '1', "101010101110", "0000000000000000"),
("0101010101010101", '1', "101010101110", "0101010101010101"),
("0101010101010101", '1', "101010101111", "0000000000000000"),
("0101010101010101", '1', "101010101111", "0101010101010101"),
("0101010101010101", '0', "101010101000", "0101010101010101"),
("0101010101010101", '0', "101010101000", "0101010101010101"),
("0101010101010101", '0', "101010101001", "0101010101010101"),
("0101010101010101", '0', "101010101010", "0101010101010101"),
("0101010101010101", '0', "101010101011", "0101010101010101"),
("0101010101010101", '0', "101010101100", "0101010101010101"),
("0101010101010101", '0', "101010101101", "0101010101010101"),
("0101010101010101", '0', "101010101110", "0101010101010101"),
("0101010101010101", '0', "101010101111", "0101010101010101"),
("0101010101010110", '1', "101010101000", "0101010101010101"),
("0101010101010110", '1', "101010101000", "0101010101010110"),
("0101010101010110", '0', "101010101000", "0101010101010110"),
("0101010101010110", '0', "101010101000", "0101010101010110"),
("0101010101010110", '0', "101010101001", "0101010101010101"),
("0101010101010110", '0', "101010101010", "0101010101010101"),
("0101010101010110", '0', "101010101011", "0101010101010101"),
("0101010101010110", '0', "101010101100", "0101010101010101"),
("0101010101010110", '0', "101010101101", "0101010101010101"),
("0101010101010110", '0', "101010101110", "0101010101010101"),
("0101010101010110", '0', "101010101111", "0101010101010101"),
("0101010101010101", '1', "101010101000", "0101010101010110"),
("0101010101010101", '1', "101010101000", "0101010101010101"),
("0101010101010110", '1', "101010101001", "0101010101010101"),
("0101010101010110", '1', "101010101001", "0101010101010110"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101001", "0101010101010110"),
("0101010101010110", '0', "101010101010", "0101010101010101"),
("0101010101010110", '0', "101010101011", "0101010101010101"),
("0101010101010110", '0', "101010101100", "0101010101010101"),
("0101010101010110", '0', "101010101101", "0101010101010101"),
("0101010101010110", '0', "101010101110", "0101010101010101"),
("0101010101010110", '0', "101010101111", "0101010101010101"),
("0101010101010101", '1', "101010101001", "0101010101010110"),
("0101010101010101", '1', "101010101001", "0101010101010101"),
("0101010101010110", '1', "101010101010", "0101010101010101"),
("0101010101010110", '1', "101010101010", "0101010101010110"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101001", "0101010101010101"),
("0101010101010110", '0', "101010101010", "0101010101010110"),
("0101010101010110", '0', "101010101011", "0101010101010101"),
("0101010101010110", '0', "101010101100", "0101010101010101"),
("0101010101010110", '0', "101010101101", "0101010101010101"),
("0101010101010110", '0', "101010101110", "0101010101010101"),
("0101010101010110", '0', "101010101111", "0101010101010101"),
("0101010101010101", '1', "101010101010", "0101010101010110"),
("0101010101010101", '1', "101010101010", "0101010101010101"),
("0101010101010110", '1', "101010101011", "0101010101010101"),
("0101010101010110", '1', "101010101011", "0101010101010110"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101001", "0101010101010101"),
("0101010101010110", '0', "101010101010", "0101010101010101"),
("0101010101010110", '0', "101010101011", "0101010101010110"),
("0101010101010110", '0', "101010101100", "0101010101010101"),
("0101010101010110", '0', "101010101101", "0101010101010101"),
("0101010101010110", '0', "101010101110", "0101010101010101"),
("0101010101010110", '0', "101010101111", "0101010101010101"),
("0101010101010101", '1', "101010101011", "0101010101010110"),
("0101010101010101", '1', "101010101011", "0101010101010101"),
("0101010101010110", '1', "101010101100", "0101010101010101"),
("0101010101010110", '1', "101010101100", "0101010101010110"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101001", "0101010101010101"),
("0101010101010110", '0', "101010101010", "0101010101010101"),
("0101010101010110", '0', "101010101011", "0101010101010101"),
("0101010101010110", '0', "101010101100", "0101010101010110"),
("0101010101010110", '0', "101010101101", "0101010101010101"),
("0101010101010110", '0', "101010101110", "0101010101010101"),
("0101010101010110", '0', "101010101111", "0101010101010101"),
("0101010101010101", '1', "101010101100", "0101010101010110"),
("0101010101010101", '1', "101010101100", "0101010101010101"),
("0101010101010110", '1', "101010101101", "0101010101010101"),
("0101010101010110", '1', "101010101101", "0101010101010110"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101001", "0101010101010101"),
("0101010101010110", '0', "101010101010", "0101010101010101"),
("0101010101010110", '0', "101010101011", "0101010101010101"),
("0101010101010110", '0', "101010101100", "0101010101010101"),
("0101010101010110", '0', "101010101101", "0101010101010110"),
("0101010101010110", '0', "101010101110", "0101010101010101"),
("0101010101010110", '0', "101010101111", "0101010101010101"),
("0101010101010101", '1', "101010101101", "0101010101010110"),
("0101010101010101", '1', "101010101101", "0101010101010101"),
("0101010101010110", '1', "101010101110", "0101010101010101"),
("0101010101010110", '1', "101010101110", "0101010101010110"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101001", "0101010101010101"),
("0101010101010110", '0', "101010101010", "0101010101010101"),
("0101010101010110", '0', "101010101011", "0101010101010101"),
("0101010101010110", '0', "101010101100", "0101010101010101"),
("0101010101010110", '0', "101010101101", "0101010101010101"),
("0101010101010110", '0', "101010101110", "0101010101010110"),
("0101010101010110", '0', "101010101111", "0101010101010101"),
("0101010101010101", '1', "101010101110", "0101010101010110"),
("0101010101010101", '1', "101010101110", "0101010101010101"),
("0101010101010110", '1', "101010101111", "0101010101010101"),
("0101010101010110", '1', "101010101111", "0101010101010110"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101000", "0101010101010101"),
("0101010101010110", '0', "101010101001", "0101010101010101"),
("0101010101010110", '0', "101010101010", "0101010101010101"),
("0101010101010110", '0', "101010101011", "0101010101010101"),
("0101010101010110", '0', "101010101100", "0101010101010101"),
("0101010101010110", '0', "101010101101", "0101010101010101"),
("0101010101010110", '0', "101010101110", "0101010101010101"),
("0101010101010110", '0', "101010101111", "0101010101010110"),
("0101010101010101", '1', "101010101111", "0101010101010110"),
("0101010101010101", '1', "101010101111", "0101010101010101"),
("0101010101010101", '0', "101010101000", "0101010101010101"),
("0101010101010101", '0', "101010101000", "0101010101010101"),
("0101010101010101", '0', "101010101001", "0101010101010101"),
("0101010101010101", '0', "101010101010", "0101010101010101"),
("0101010101010101", '0', "101010101011", "0101010101010101"),
("0101010101010101", '0', "101010101100", "0101010101010101"),
("0101010101010101", '0', "101010101101", "0101010101010101"),
("0101010101010101", '0', "101010101110", "0101010101010101"),
("0101010101010101", '0', "101010101111", "0101010101010101"),
("0101010101010101", '0', "000101010101", "0000000000000000"),
("0101010101010101", '0', "000101010101", "0000000000000000"),
("0101010101010101", '0', "001101010101", "0000000000000000"),
("0101010101010101", '0', "010101010101", "0000000000000000"),
("0101010101010101", '0', "011101010101", "0000000000000000"),
("0101010101010101", '0', "100101010101", "0000000000000000"),
("0101010101010101", '0', "101101010101", "0000000000000000"),
("0101010101010101", '0', "110101010101", "0000000000000000"),
("0101010101010101", '0', "111101010101", "0000000000000000"),
("0101010101010101", '1', "000101010101", "0000000000000000"),
("0101010101010101", '1', "000101010101", "0101010101010101"),
("0101010101010101", '1', "001101010101", "0000000000000000"),
("0101010101010101", '1', "001101010101", "0101010101010101"),
("0101010101010101", '1', "010101010101", "0000000000000000"),
("0101010101010101", '1', "010101010101", "0101010101010101"),
("0101010101010101", '1', "011101010101", "0000000000000000"),
("0101010101010101", '1', "011101010101", "0101010101010101"),
("0101010101010101", '1', "100101010101", "0000000000000000"),
("0101010101010101", '1', "100101010101", "0101010101010101"),
("0101010101010101", '1', "101101010101", "0000000000000000"),
("0101010101010101", '1', "101101010101", "0101010101010101"),
("0101010101010101", '1', "110101010101", "0000000000000000"),
("0101010101010101", '1', "110101010101", "0101010101010101"),
("0101010101010101", '1', "111101010101", "0000000000000000"),
("0101010101010101", '1', "111101010101", "0101010101010101"),
("0101010101010101", '0', "000101010101", "0101010101010101"),
("0101010101010101", '0', "000101010101", "0101010101010101"),
("0101010101010101", '0', "001101010101", "0101010101010101"),
("0101010101010101", '0', "010101010101", "0101010101010101"),
("0101010101010101", '0', "011101010101", "0101010101010101"),
("0101010101010101", '0', "100101010101", "0101010101010101"),
("0101010101010101", '0', "101101010101", "0101010101010101"),
("0101010101010101", '0', "110101010101", "0101010101010101"),
("0101010101010101", '0', "111101010101", "0101010101010101"),
("0101010101010110", '1', "000101010101", "0101010101010101"),
("0101010101010110", '1', "000101010101", "0101010101010110"),
("0101010101010110", '0', "000101010101", "0101010101010110"),
("0101010101010110", '0', "000101010101", "0101010101010110"),
("0101010101010110", '0', "001101010101", "0101010101010101"),
("0101010101010110", '0', "010101010101", "0101010101010101"),
("0101010101010110", '0', "011101010101", "0101010101010101"),
("0101010101010110", '0', "100101010101", "0101010101010101"),
("0101010101010110", '0', "101101010101", "0101010101010101"),
("0101010101010110", '0', "110101010101", "0101010101010101"),
("0101010101010110", '0', "111101010101", "0101010101010101"),
("0101010101010101", '1', "000101010101", "0101010101010110"),
("0101010101010101", '1', "000101010101", "0101010101010101"),
("0101010101010110", '1', "001101010101", "0101010101010101"),
("0101010101010110", '1', "001101010101", "0101010101010110"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "001101010101", "0101010101010110"),
("0101010101010110", '0', "010101010101", "0101010101010101"),
("0101010101010110", '0', "011101010101", "0101010101010101"),
("0101010101010110", '0', "100101010101", "0101010101010101"),
("0101010101010110", '0', "101101010101", "0101010101010101"),
("0101010101010110", '0', "110101010101", "0101010101010101"),
("0101010101010110", '0', "111101010101", "0101010101010101"),
("0101010101010101", '1', "001101010101", "0101010101010110"),
("0101010101010101", '1', "001101010101", "0101010101010101"),
("0101010101010110", '1', "010101010101", "0101010101010101"),
("0101010101010110", '1', "010101010101", "0101010101010110"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "001101010101", "0101010101010101"),
("0101010101010110", '0', "010101010101", "0101010101010110"),
("0101010101010110", '0', "011101010101", "0101010101010101"),
("0101010101010110", '0', "100101010101", "0101010101010101"),
("0101010101010110", '0', "101101010101", "0101010101010101"),
("0101010101010110", '0', "110101010101", "0101010101010101"),
("0101010101010110", '0', "111101010101", "0101010101010101"),
("0101010101010101", '1', "010101010101", "0101010101010110"),
("0101010101010101", '1', "010101010101", "0101010101010101"),
("0101010101010110", '1', "011101010101", "0101010101010101"),
("0101010101010110", '1', "011101010101", "0101010101010110"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "001101010101", "0101010101010101"),
("0101010101010110", '0', "010101010101", "0101010101010101"),
("0101010101010110", '0', "011101010101", "0101010101010110"),
("0101010101010110", '0', "100101010101", "0101010101010101"),
("0101010101010110", '0', "101101010101", "0101010101010101"),
("0101010101010110", '0', "110101010101", "0101010101010101"),
("0101010101010110", '0', "111101010101", "0101010101010101"),
("0101010101010101", '1', "011101010101", "0101010101010110"),
("0101010101010101", '1', "011101010101", "0101010101010101"),
("0101010101010110", '1', "100101010101", "0101010101010101"),
("0101010101010110", '1', "100101010101", "0101010101010110"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "001101010101", "0101010101010101"),
("0101010101010110", '0', "010101010101", "0101010101010101"),
("0101010101010110", '0', "011101010101", "0101010101010101"),
("0101010101010110", '0', "100101010101", "0101010101010110"),
("0101010101010110", '0', "101101010101", "0101010101010101"),
("0101010101010110", '0', "110101010101", "0101010101010101"),
("0101010101010110", '0', "111101010101", "0101010101010101"),
("0101010101010101", '1', "100101010101", "0101010101010110"),
("0101010101010101", '1', "100101010101", "0101010101010101"),
("0101010101010110", '1', "101101010101", "0101010101010101"),
("0101010101010110", '1', "101101010101", "0101010101010110"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "001101010101", "0101010101010101"),
("0101010101010110", '0', "010101010101", "0101010101010101"),
("0101010101010110", '0', "011101010101", "0101010101010101"),
("0101010101010110", '0', "100101010101", "0101010101010101"),
("0101010101010110", '0', "101101010101", "0101010101010110"),
("0101010101010110", '0', "110101010101", "0101010101010101"),
("0101010101010110", '0', "111101010101", "0101010101010101"),
("0101010101010101", '1', "101101010101", "0101010101010110"),
("0101010101010101", '1', "101101010101", "0101010101010101"),
("0101010101010110", '1', "110101010101", "0101010101010101"),
("0101010101010110", '1', "110101010101", "0101010101010110"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "001101010101", "0101010101010101"),
("0101010101010110", '0', "010101010101", "0101010101010101"),
("0101010101010110", '0', "011101010101", "0101010101010101"),
("0101010101010110", '0', "100101010101", "0101010101010101"),
("0101010101010110", '0', "101101010101", "0101010101010101"),
("0101010101010110", '0', "110101010101", "0101010101010110"),
("0101010101010110", '0', "111101010101", "0101010101010101"),
("0101010101010101", '1', "110101010101", "0101010101010110"),
("0101010101010101", '1', "110101010101", "0101010101010101"),
("0101010101010110", '1', "111101010101", "0101010101010101"),
("0101010101010110", '1', "111101010101", "0101010101010110"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "000101010101", "0101010101010101"),
("0101010101010110", '0', "001101010101", "0101010101010101"),
("0101010101010110", '0', "010101010101", "0101010101010101"),
("0101010101010110", '0', "011101010101", "0101010101010101"),
("0101010101010110", '0', "100101010101", "0101010101010101"),
("0101010101010110", '0', "101101010101", "0101010101010101"),
("0101010101010110", '0', "110101010101", "0101010101010101"),
("0101010101010110", '0', "111101010101", "0101010101010110"),
("0101010101010101", '1', "111101010101", "0101010101010110"),
("0101010101010101", '1', "111101010101", "0101010101010101"),
("0101010101010101", '0', "000101010101", "0101010101010101"),
("0101010101010101", '0', "000101010101", "0101010101010101"),
("0101010101010101", '0', "001101010101", "0101010101010101"),
("0101010101010101", '0', "010101010101", "0101010101010101"),
("0101010101010101", '0', "011101010101", "0101010101010101"),
("0101010101010101", '0', "100101010101", "0101010101010101"),
("0101010101010101", '0', "101101010101", "0101010101010101"),
("0101010101010101", '0', "110101010101", "0101010101010101"),
("0101010101010101", '0', "111101010101", "0101010101010101"));
begin
-- Check each pattern.
for i in patterns'range loop
-- Set the inputs.
d <= patterns(i).d;
load <= patterns(i).load;
address <= patterns(i).address;
wait for 0.25 ns;
-- Check the outputs.
assert cout = patterns(i).cout
report "bad data, memory problem" severity error;
wait for 0.75 ns;
end loop;
-- End the clock
finish <= '1';
assert false report "end of test" severity note;
-- Wait forever; this will finish the simulation.
wait;
end process;
end ram4k_tb_arch;
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