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[/] [wb4pb/] [trunk/] [sim/] [hdl/] [picoblaze_wb_uart_tb.vhd] - Rev 20
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-------------------------------------------------------------------------------- -- This sourcecode is released under BSD license. -- Please see http://www.opensource.org/licenses/bsd-license.php for details! -------------------------------------------------------------------------------- -- -- Copyright (c) 2010, Stefan Fischer <Ste.Fis@OpenCores.org> -- All rights reserved. -- -- 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 the author nor the names of his 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 COPYRIGHT HOLDER 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. -- -------------------------------------------------------------------------------- -- filename: picoblaze_wb_uart_tb.vhd -- description: testbench for picoblaze_wb_uart example -- todo4user: modify stimulus as needed -- version: 0.0.0 -- changelog: - 0.0.0, initial release -- - ... -------------------------------------------------------------------------------- library ieee; use ieee.std_logic_1164.all; entity picoblaze_wb_uart_tb is end picoblaze_wb_uart_tb; architecture behavioral of picoblaze_wb_uart_tb is component picoblaze_wb_uart is port ( p_rst_n_i : in std_logic; p_clk_i : in std_logic; p_uart_rx_si_i : in std_logic; p_uart_tx_so_o : out std_logic ); end component; signal rst_n : std_logic := '0'; signal clk : std_logic := '1'; signal uart_rx_si : std_logic := '0'; signal uart_tx_so : std_logic := '0'; constant PERIOD : time := 20 ns; begin -- system signal generation rst_n <= '1' after PERIOD*2; clk <= not clk after PERIOD/2; -- simple serial loopback uart_rx_si <= uart_tx_so; -- design under test instance dut : picoblaze_wb_uart port map ( p_rst_n_i => rst_n, p_clk_i => clk, p_uart_rx_si_i => uart_rx_si, p_uart_tx_so_o => uart_tx_so ); end behavioral;
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