Subversion Repositories astron_mm

-------------------------------------------------------------------------------

--

-- Copyright 2020

-- ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>

-- P.O.Box 2, 7990 AA Dwingeloo, The Netherlands

-- 

-- Licensed under the Apache License, Version 2.0 (the "License");

-- you may not use this file except in compliance with the License.

-- You may obtain a copy of the License at

-- 

--     http://www.apache.org/licenses/LICENSE-2.0

-- 

-- Unless required by applicable law or agreed to in writing, software

-- distributed under the License is distributed on an "AS IS" BASIS,

-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-- See the License for the specific language governing permissions and

-- limitations under the License.

--

-------------------------------------------------------------------------------

LIBRARY IEEE, common_pkg_lib, astron_ram_lib;

USE IEEE.STD_LOGIC_1164.ALL;

USE IEEE.NUMERIC_STD.ALL;

USE common_pkg_lib.common_pkg.ALL;

USE astron_ram_lib.common_ram_pkg.ALL;

USE common_pkg_lib.tb_common_pkg.ALL;

USE work.tb_common_mem_pkg.ALL;

ENTITY tb_common_mem_mux IS

 GENERIC (

    g_nof_mosi    : POSITIVE := 16;     -- Number of memory interfaces in the array.                       

    g_mult_addr_w : POSITIVE := 4       -- Address width of each memory-interface element in the array.

  );

END tb_common_mem_mux;

-- Usage:

--   > as 10

--   > run -all

ARCHITECTURE tb OF tb_common_mem_mux IS

  CONSTANT clk_period   : TIME    := 10 ns;

  CONSTANT c_data_w     : NATURAL := 32;

  CONSTANT c_test_ram   : t_c_mem := (latency  => 1,

                                      adr_w    => g_mult_addr_w,

                                      dat_w    => c_data_w,

                                      nof_dat  => 2**g_mult_addr_w,

                                      init_sl  => '0');

  SIGNAL rst      : STD_LOGIC;

  SIGNAL clk      : STD_LOGIC := '1';

  SIGNAL tb_end   : STD_LOGIC;

  SIGNAL mosi_arr : t_mem_mosi_arr(g_nof_mosi - 1 DOWNTO 0);

  SIGNAL miso_arr : t_mem_miso_arr(g_nof_mosi - 1 DOWNTO 0);

  SIGNAL mosi     : t_mem_mosi;

  SIGNAL miso     : t_mem_miso;

BEGIN

  clk <= NOT clk OR tb_end AFTER clk_period/2;

  rst <= '1', '0' AFTER clk_period*5;

  p_stimuli : PROCESS

    VARIABLE temp : INTEGER;

  BEGIN

    tb_end <= '0';

    mosi   <= c_mem_mosi_rst;

    -- Write the whole memory range

    FOR I IN 0 TO g_nof_mosi-1 LOOP

      FOR J IN 0 TO 2**g_mult_addr_w-1 LOOP

        proc_mem_mm_bus_wr(I*2**g_mult_addr_w + J, I+J, clk, mosi);

      END LOOP;

    END LOOP;

    -- Read back the whole range and check if data is as expected

    FOR I IN 0 TO g_nof_mosi-1 LOOP

      FOR J IN 0 TO 2**g_mult_addr_w-1 LOOP

        proc_mem_mm_bus_rd(I*2**g_mult_addr_w + J, clk, mosi);

        proc_common_wait_some_cycles(clk, 1);

        temp := TO_UINT(miso.rddata(31 DOWNTO 0));

        IF(temp /= I+J) THEN

          REPORT "Error! Readvalue is not as expected" SEVERITY ERROR;

        END IF;

      END LOOP;

    END LOOP;

    tb_end <= '1';

    WAIT;

  END PROCESS;

  generation_of_test_rams : FOR I IN 0 TO g_nof_mosi-1 GENERATE

    u_test_rams : ENTITY astron_ram_lib.common_ram_r_w

    GENERIC MAP (

      g_ram       => c_test_ram,

      g_init_file => "UNUSED"

    )

    PORT MAP (

      rst       => rst,

      clk       => clk,

      clken     => '1',

      wr_en     => mosi_arr(I).wr,

      wr_adr    => mosi_arr(I).address(g_mult_addr_w-1 DOWNTO 0),

      wr_dat    => mosi_arr(I).wrdata(c_data_w-1 DOWNTO 0),

      rd_en     => mosi_arr(I).rd,

      rd_adr    => mosi_arr(I).address(g_mult_addr_w-1 DOWNTO 0),

      rd_dat    => miso_arr(I).rddata(c_data_w-1 DOWNTO 0),

      rd_val    => miso_arr(I).rdval

    );

  END GENERATE;

  d_dut : ENTITY work.common_mem_mux

  GENERIC MAP (

    g_nof_mosi    => g_nof_mosi,

    g_mult_addr_w => g_mult_addr_w

  )

  PORT MAP (

    mosi_arr => mosi_arr,

    miso_arr => miso_arr,

    mosi     => mosi,

    miso     => miso

  );

END tb;