Subversion Repositories astron_statistics

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

--

-- 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;

USE IEEE.std_logic_1164.ALL;

USE IEEE.numeric_std.ALL;

USE common_pkg_lib.common_pkg.ALL;

ENTITY tb_st_calc IS

  GENERIC (

    g_in_dat_w     : NATURAL := 16;

    g_out_dat_w    : NATURAL := 32

  );

END tb_st_calc;

ARCHITECTURE tb OF tb_st_calc IS

  CONSTANT clk_period             : TIME := 10 ns;

  CONSTANT c_nof_sync             : NATURAL := 3;

  CONSTANT c_nof_stat             : NATURAL := 100;

  CONSTANT c_out_adr_w            : NATURAL := ceil_log2(c_nof_stat);

  CONSTANT c_gap_size             : NATURAL := 2**c_out_adr_w - c_nof_stat;

  CONSTANT c_nof_accum_per_sync   : NATURAL := 5;  -- integration time

  SIGNAL tb_end          : STD_LOGIC := '0';

  SIGNAL clk             : STD_LOGIC := '0';

  SIGNAL rst             : STD_LOGIC;

  SIGNAL in_sync         : STD_LOGIC;

  SIGNAL in_val          : STD_LOGIC;

  SIGNAL in_dat          : STD_LOGIC_VECTOR(g_in_dat_w-1 DOWNTO 0);

  SIGNAL in_a_re         : STD_LOGIC_VECTOR(g_in_dat_w-1 DOWNTO 0);

  SIGNAL in_a_im         : STD_LOGIC_VECTOR(g_in_dat_w-1 DOWNTO 0);

  SIGNAL in_b_re         : STD_LOGIC_VECTOR(g_in_dat_w-1 DOWNTO 0);

  SIGNAL in_b_im         : STD_LOGIC_VECTOR(g_in_dat_w-1 DOWNTO 0);

  SIGNAL out_adr         : STD_LOGIC_VECTOR(c_out_adr_w-1 DOWNTO 0);

  SIGNAL out_re          : STD_LOGIC_VECTOR(g_out_dat_w-1 DOWNTO 0);

  SIGNAL out_im          : STD_LOGIC_VECTOR(g_out_dat_w-1 DOWNTO 0);

  SIGNAL out_val         : STD_LOGIC;

BEGIN

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

  in_a_re <= in_dat;

  in_a_im <= in_dat;

  in_b_re <= in_dat;

  in_b_im <= in_dat;

  in_dat <= (OTHERS=>'0') WHEN rst='1' ELSE INCR_UVEC(in_dat, 1) WHEN rising_edge(clk) AND in_val='1';

  -- run 1 us

  p_stimuli : PROCESS

  BEGIN

    rst <= '1';

    in_sync <= '0';

    in_val <= '0';

    WAIT UNTIL rising_edge(clk);

    FOR I IN 0 TO 9 LOOP WAIT UNTIL rising_edge(clk); END LOOP;

    rst <= '0';

    FOR I IN 0 TO 9 LOOP WAIT UNTIL rising_edge(clk); END LOOP;

    FOR I IN 0 TO c_nof_sync-1 LOOP

      in_sync <= '1';

      WAIT UNTIL rising_edge(clk);

      in_sync <= '0';

      FOR J IN 0 TO c_nof_accum_per_sync-1 LOOP

        in_val <= '1';

        FOR I IN 0 TO c_nof_stat-1 LOOP WAIT UNTIL rising_edge(clk); END LOOP;

        in_val <= '0';

        FOR I IN 0 TO c_gap_size-1 LOOP WAIT UNTIL rising_edge(clk); END LOOP;

      END LOOP;

    END LOOP;

    FOR I IN 0 TO 9 LOOP WAIT UNTIL rising_edge(clk); END LOOP;

    tb_end <= '1';

    WAIT;

  END PROCESS;

  u_dut : ENTITY work.st_calc

  GENERIC MAP (

    g_nof_mux       => 1,

    g_nof_stat      => c_nof_stat,

    g_in_dat_w      => g_in_dat_w,

    g_out_dat_w     => g_out_dat_w,

    g_out_adr_w     => c_out_adr_w,

    g_complex       => FALSE

  )

  PORT MAP (

    rst        => rst,

    clk        => clk,

    clken      => '1',

    in_ar      => in_a_re,

    in_ai      => in_a_im,

    in_br      => in_b_re,

    in_bi      => in_b_im,

    in_val     => in_val,

    in_sync    => in_sync,

    out_adr    => out_adr,

    out_re     => out_re,

    out_im     => out_im,

    out_val    => out_val,

    out_val_m  => OPEN

  );

END tb;