Subversion Repositories astron_wpfb

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

--

-- Copyright (C) 2012

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

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

--

-- 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/>.

--

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

--

-- Purpose: Test bench for the wideband poly phase filterbank.

--

--          The testbech uses blockgenerators to generate data for 

--          every input of the wideband poly phase filterbank. 

--          The output of the WPFB is stored in databuffers. 

--          Both the block generators and databuffers are controlled

--          via a mm interface. 

--          Use this testbench in conjunction with: 

--

--          ../python/tc_mmf_wpfb_unit.py

--          For verifying the complete wideband polyphase filter bank: g_use_bg = FALSE

--

--          ../python/tc_mmf_wpfb_unit_functional.py

--          For verifying the different wide- and narrowband configurationss

--          of the wpfb_unit. 

--

-- (Automated) Usage: 

--   > Be sure that the c_start_modelsim variable is set to 1 in the script. 

--   > Run python script in separate terminal: "python tc_mmf_wpfb_unit.py --unb 0 --bn 0 --sim"

--          

-- (Manual) Usage:

--   > run -all

--   > Be sure that the c_start_modelsim variable is set to 0 in the script. 

--   > Run python script in separate terminal: "python tc_mmf_wpfb_unit.py --unb 0 --bn 0 --sim"

--   > Check the results of the python script. 

--   > Stop the simulation manually in Modelsim by pressing the stop-button. 

--   > For fractional frequencies set g_nof_blocks=32 to be able to simulate a sufficent number of periods without transition.

LIBRARY IEEE, common_pkg_lib, astron_mm_lib, astron_diagnostics_lib, dp_pkg_lib, astron_r2sdf_fft_lib, astron_wb_fft_lib, astron_filter_lib, astron_ram_lib, astron_sim_tools_lib;

USE IEEE.std_logic_1164.ALL;

USE IEEE.numeric_std.ALL;

USE IEEE.math_real.ALL;

USE common_pkg_lib.common_pkg.ALL;

USE astron_ram_lib.common_ram_pkg.ALL;

USE common_pkg_lib.common_str_pkg.ALL;

USE common_pkg_lib.tb_common_pkg.ALL;

USE astron_mm_lib.tb_common_mem_pkg.ALL;

USE astron_mm_lib.mm_file_unb_pkg.ALL;

USE astron_mm_lib.mm_file_pkg.ALL;

USE dp_pkg_lib.dp_stream_pkg.ALL;

USE astron_diagnostics_lib.diag_pkg.ALL;

USE astron_r2sdf_fft_lib.twiddlesPkg.all;

USE astron_r2sdf_fft_lib.rTwoSDFPkg.all;

USE astron_wb_fft_lib.tb_fft_pkg.all;

USE astron_wb_fft_lib.fft_pkg.all;

USE astron_filter_lib.fil_pkg.all;

USE work.wpfb_pkg.all;

ENTITY tb_mmf_wpfb_unit IS

  GENERIC(

    g_wb_factor         : natural := 1;      -- = default 1, wideband factor

    g_nof_wb_streams    : natural := 1;      -- = 1, the number of parallel wideband streams. The filter coefficients are shared on every wb-stream.                      

    g_nof_chan          : natural := 0;      -- = default 0, defines the number of channels (=time-multiplexed input signals): nof channels = 2**nof_chan         

    g_nof_points        : natural := 64;     -- = 1024, N point FFT

    g_nof_taps          : natural := 16;      -- = 8 nof taps n the filter

    g_nof_blocks        : natural := 4;      -- = 4, the number of blocks of g_nof_points each in the BG waveform (must be power of 2 due to that BG c_bg_block_len must be power of 2)

    g_in_dat_w          : natural := 8;      -- = 8, number of input bits                                                       

    g_out_dat_w         : natural := 16;     -- = 14, number of output bits: in_dat_w + natural((ceil_log2(nof_points))/2) 

    g_use_separate      : boolean := FALSE;   -- = false for complex input, true for two real inputs

    g_use_bg            : boolean := FALSE;

    g_coefs_file_prefix : string  := "data/coefs_wide"

  );

END tb_mmf_wpfb_unit;

ARCHITECTURE tb OF tb_mmf_wpfb_unit IS

    CONSTANT c_in_backoff_w     : natural := 0;      -- = 0, number of bits for input backoff to avoid FIR output overflow

    CONSTANT c_nof_blk_per_sync : natural := 20;

    CONSTANT c_wpfb : t_wpfb  := (g_wb_factor, g_nof_points, g_nof_chan, g_nof_wb_streams,

                                  g_nof_taps, c_in_backoff_w, g_in_dat_w, 16, 16,

                                  true, false, g_use_separate, 16, g_out_dat_w, 0, 18, 2, true, 56, 2, c_nof_blk_per_sync,

                                  c_fft_pipeline, c_fft_pipeline, c_fil_ppf_pipeline);

    --  type t_wpfb is record  

    --  -- General parameters for the wideband poly phase filter

    --  wb_factor         : natural;        -- = default 4, wideband factor

    --  nof_points        : natural;        -- = 1024, N point FFT (Also the number of subbands for the filetr part)

    --  nof_chan          : natural;        -- = default 0, defines the number of channels (=time-multiplexed input signals): nof channels = 2**nof_chan     

    --  nof_wb_streams    : natural;        -- = 1, the number of parallel wideband streams. The filter coefficients are shared on every stream.                      

    --  

    --  -- Parameters for the poly phase filter

    --  nof_taps          : natural;        -- = 16, the number of FIR taps per subband

    --  fil_backoff_w     : natural;        -- = 0, number of bits for input backoff to avoid output overflow

    --  fil_in_dat_w      : natural;        -- = 8, number of input bits

    --  fil_out_dat_w     : natural;        -- = 16, number of output bits

    --  coef_dat_w        : natural;        -- = 16, data width of the FIR coefficients

    --                                    

    --  -- Parameters for the FFT         

    --  use_reorder       : boolean;        -- = false for bit-reversed output, true for normal output

    --  use_fft_shift     : boolean;        -- = false for [0, pos, neg] bin frequencies order, true for [neg, 0, pos] bin frequencies order in case of complex input

    --  use_separate      : boolean;        -- = false for complex input, true for two real inputs

    --  fft_in_dat_w      : natural;        -- = 16, number of input bits

    --  fft_out_dat_w     : natural;        -- = 13, number of output bits

    --  fft_out_gain_w    : natural;        -- = 0, output gain factor applied after the last stage output, before requantization to out_dat_w

    --  stage_dat_w       : natural;        -- = 18, number of bits that are used inter-stage

    --  guard_w           : natural;        -- = 2   

    --  guard_enable      : boolean;        -- = true

    --

    --  -- Parameters for the statistics

    --  stat_data_w       : positive;       -- = 56

    --  stat_data_sz      : positive;       -- = 2

    --  nof_blk_per_sync  : natural;        -- = 800000, number of FFT output blocks per sync interval

    --

    --  -- Pipeline parameters for both poly phase filter and FFT. These are heritaged from the filter and fft libraries.  

    --  pft_pipeline      : t_fft_pipeline;     -- Pipeline settings for the pipelined FFT

    --  fft_pipeline      : t_fft_pipeline;     -- Pipeline settings for the parallel FFT

    --  fil_pipeline      : t_fil_ppf_pipeline; -- Pipeline settings for the filter units 

    --  

    --  end record;

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

  -- Clocks and resets

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

  CONSTANT c_mm_clk_period         : TIME := 100 ps;

  CONSTANT c_dp_clk_period         : TIME := 5 ns;

  CONSTANT c_sclk_period           : TIME := c_dp_clk_period / c_wpfb.wb_factor;

  CONSTANT c_dp_pps_period         : NATURAL := 64;

  SIGNAL dp_pps                    : STD_LOGIC;

  SIGNAL mm_rst                    : STD_LOGIC;

  SIGNAL mm_clk                    : STD_LOGIC := '0';

  SIGNAL dp_rst                    : STD_LOGIC;

  SIGNAL dp_clk                    : STD_LOGIC := '0';

  SIGNAL SCLK                      : STD_LOGIC := '0';

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

  -- MM buses

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

  SIGNAL reg_diag_bg_mosi          : t_mem_mosi;

  SIGNAL reg_diag_bg_miso          : t_mem_miso;

  SIGNAL ram_diag_bg_mosi          : t_mem_mosi;

  SIGNAL ram_diag_bg_miso          : t_mem_miso;

  SIGNAL ram_diag_data_buf_re_mosi : t_mem_mosi;

  SIGNAL ram_diag_data_buf_re_miso : t_mem_miso;

  SIGNAL reg_diag_data_buf_re_mosi : t_mem_mosi;

  SIGNAL reg_diag_data_buf_re_miso : t_mem_miso;

  SIGNAL ram_diag_data_buf_im_mosi : t_mem_mosi;

  SIGNAL ram_diag_data_buf_im_miso : t_mem_miso;

  SIGNAL reg_diag_data_buf_im_mosi : t_mem_mosi;

  SIGNAL reg_diag_data_buf_im_miso : t_mem_miso;

  SIGNAL ram_st_sst_mosi           : t_mem_mosi := c_mem_mosi_rst;

  SIGNAL ram_st_sst_miso           : t_mem_miso := c_mem_miso_rst;

  SIGNAL ram_fil_coefs_mosi        : t_mem_mosi := c_mem_mosi_rst;

  SIGNAL ram_fil_coefs_miso        : t_mem_miso := c_mem_miso_rst;

  SIGNAL reg_diag_bg_pfb_mosi      : t_mem_mosi := c_mem_mosi_rst;

  SIGNAL reg_diag_bg_pfb_miso      : t_mem_miso := c_mem_miso_rst;

  SIGNAL ram_diag_bg_pfb_mosi      : t_mem_mosi := c_mem_mosi_rst;

  SIGNAL ram_diag_bg_pfb_miso      : t_mem_miso := c_mem_miso_rst;

  CONSTANT c_coefs_file_prefix      : STRING  := g_coefs_file_prefix & NATURAL'IMAGE(c_wpfb.wb_factor) & "_p"& NATURAL'IMAGE(c_wpfb.nof_points) & "_t"& NATURAL'IMAGE(c_wpfb.nof_taps);

  CONSTANT c_nof_streams            : POSITIVE := c_wpfb.nof_wb_streams*c_wpfb.wb_factor;

  CONSTANT c_nof_channels           : NATURAL  := 2**c_wpfb.nof_chan;

  CONSTANT c_bg_block_len           : NATURAL  := c_wpfb.nof_points*g_nof_blocks*c_nof_channels/c_wpfb.wb_factor;

  CONSTANT c_bg_buf_adr_w           : NATURAL := ceil_log2(c_bg_block_len);

  CONSTANT c_bg_data_file_index_arr : t_nat_natural_arr := array_init(0, c_nof_streams, 1);

  CONSTANT c_bg_data_file_prefix    : STRING := "UNUSED";

  SIGNAL bg_siso_arr                : t_dp_siso_arr(c_nof_streams-1 DOWNTO 0) := (OTHERS=>c_dp_siso_rdy);

  SIGNAL bg_sosi_arr                : t_dp_sosi_arr(c_nof_streams-1 DOWNTO 0);

  SIGNAL out_sosi_arr               : t_dp_sosi_arr(c_nof_streams-1 DOWNTO 0);

  SIGNAL scope_in_sosi              : t_dp_sosi_integer_arr(c_wpfb.nof_wb_streams-1 DOWNTO 0);

  SIGNAL scope_out_sosi             : t_dp_sosi_integer_arr(c_wpfb.nof_wb_streams-1 DOWNTO 0);

  SIGNAL scope_out_power            : REAL := 0.0;

  SIGNAL scope_out_ampl             : REAL := 0.0;

  SIGNAL scope_out_index            : NATURAL;

  SIGNAL scope_out_bin              : NATURAL;

  SIGNAL scope_out_band             : NATURAL;

  SIGNAL scope_out_ampl_x           : REAL := 0.0;

  SIGNAL scope_out_ampl_y           : REAL := 0.0;

BEGIN

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

  -- Clock and reset generation

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

  mm_clk <= NOT mm_clk AFTER c_mm_clk_period/2;

  mm_rst <= '1', '0' AFTER c_mm_clk_period*5;

  dp_clk <= NOT dp_clk AFTER c_dp_clk_period/2;

  dp_rst <= '1', '0' AFTER c_dp_clk_period*5;

  SCLK   <= NOT SCLK AFTER c_sclk_period/2;

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

  -- External PPS

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

  proc_common_gen_pulse(1, c_dp_pps_period, '1', dp_clk, dp_pps);

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

  -- Procedure that polls a sim control file that can be used to e.g. get

  -- the simulation time in ns

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

  mmf_poll_sim_ctrl_file(c_mmf_unb_file_path & "sim.ctrl", c_mmf_unb_file_path & "sim.stat");

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

  -- MM buses  

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

  u_mm_file_reg_diag_bg          : mm_file GENERIC MAP(mmf_unb_file_prefix(0, 0, "BN") & "REG_DIAG_BG")

                                           PORT MAP(mm_rst, mm_clk, reg_diag_bg_mosi, reg_diag_bg_miso);

  u_mm_file_ram_diag_bg          : mm_file GENERIC MAP(mmf_unb_file_prefix(0, 0, "BN") & "RAM_DIAG_BG")

                                           PORT MAP(mm_rst, mm_clk, ram_diag_bg_mosi, ram_diag_bg_miso);

  u_mm_file_ram_diag_data_buf_re : mm_file GENERIC MAP(mmf_unb_file_prefix(0, 0, "BN") & "RAM_DIAG_DATA_BUFFER_REAL")

                                           PORT MAP(mm_rst, mm_clk, ram_diag_data_buf_re_mosi, ram_diag_data_buf_re_miso);

  u_mm_file_reg_diag_data_buf_re : mm_file GENERIC MAP(mmf_unb_file_prefix(0, 0, "BN") & "REG_DIAG_DATA_BUFFER_REAL")

                                           PORT MAP(mm_rst, mm_clk, reg_diag_data_buf_re_mosi, reg_diag_data_buf_re_miso);

  u_mm_file_ram_diag_data_buf_im : mm_file GENERIC MAP(mmf_unb_file_prefix(0, 0, "BN") & "RAM_DIAG_DATA_BUFFER_IMAG")

                                           PORT MAP(mm_rst, mm_clk, ram_diag_data_buf_im_mosi, ram_diag_data_buf_im_miso);

  u_mm_file_reg_diag_data_buf_im : mm_file GENERIC MAP(mmf_unb_file_prefix(0, 0, "BN") & "REG_DIAG_DATA_BUFFER_IMAG")

                                           PORT MAP(mm_rst, mm_clk, reg_diag_data_buf_im_mosi, reg_diag_data_buf_im_miso);

  u_mm_file_ram_fil_coefs        : mm_file GENERIC MAP(mmf_unb_file_prefix(0, 0, "BN") & "RAM_FIL_COEFS")

                                           PORT MAP(mm_rst, mm_clk, ram_fil_coefs_mosi, ram_fil_coefs_miso);

  u_mm_file_ram_st_sst           : mm_file GENERIC MAP(mmf_unb_file_prefix(0, 0, "BN") & "RAM_ST_SST")

                                           PORT MAP(mm_rst, mm_clk, ram_st_sst_mosi, ram_st_sst_miso);

  u_mm_file_reg_diag_pfb_bg      : mm_file GENERIC MAP(mmf_unb_file_prefix(0, 0, "BN") & "REG_DIAG_BG_PFB")

                                           PORT MAP(mm_rst, mm_clk, reg_diag_bg_pfb_mosi, reg_diag_bg_pfb_miso);

  u_mm_file_ram_diag_pfb_bg      : mm_file GENERIC MAP(mmf_unb_file_prefix(0, 0, "BN") & "RAM_DIAG_BG_PFB")

                                           PORT MAP(mm_rst, mm_clk, ram_diag_bg_pfb_mosi, ram_diag_bg_pfb_miso);

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

  -- Source: block generator

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

  u_bg : ENTITY astron_diagnostics_lib.mms_diag_block_gen

  GENERIC MAP(

    g_nof_streams        => c_nof_streams,

    g_buf_dat_w          => c_nof_complex*c_wpfb.fil_in_dat_w,

    g_buf_addr_w         => c_bg_buf_adr_w,               -- Waveform buffer size 2**g_buf_addr_w nof samples

    g_file_index_arr     => c_bg_data_file_index_arr,

    g_file_name_prefix   => c_bg_data_file_prefix

  )

  PORT MAP(

    -- System

    mm_rst           => mm_rst,

    mm_clk           => mm_clk,

    dp_rst           => dp_rst,

    dp_clk           => dp_clk,

    en_sync          => dp_pps,

    -- MM interface

    reg_bg_ctrl_mosi => reg_diag_bg_mosi,

    reg_bg_ctrl_miso => reg_diag_bg_miso,

    ram_bg_data_mosi => ram_diag_bg_mosi,

    ram_bg_data_miso => ram_diag_bg_miso,

    -- ST interface

    out_siso_arr     => bg_siso_arr,

    out_sosi_arr     => bg_sosi_arr

  );

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

  -- Source: DUT input scope 

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

  gen_input_scopes : FOR I IN 0 TO c_wpfb.nof_wb_streams-1 GENERATE

    u_in_scope : ENTITY astron_sim_tools_lib.dp_wideband_wb_arr_scope

    GENERIC MAP (

      g_sim                 => TRUE,

      g_wideband_factor     => c_wpfb.wb_factor,

      g_wideband_big_endian => FALSE,

      g_dat_w               => c_wpfb.fil_in_dat_w

    )

    PORT MAP (

      SCLK         => SCLK,

      wb_sosi_arr  => bg_sosi_arr((I+1)*c_wpfb.wb_factor-1 DOWNTO I*c_wpfb.wb_factor),

      scope_sosi   => scope_in_sosi(I)

    );

  END GENERATE;

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

  -- DUT = Device Under Test

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

  u_dut : ENTITY work.wpfb_unit

  GENERIC MAP(

    g_wpfb              => c_wpfb,

    g_use_bg            => g_use_bg,

    g_coefs_file_prefix => c_coefs_file_prefix

  )

  PORT MAP(

    dp_rst             => dp_rst,

    dp_clk             => dp_clk,

    mm_rst             => mm_rst,

    mm_clk             => mm_clk,

    ram_fil_coefs_mosi => ram_fil_coefs_mosi,

    ram_fil_coefs_miso => ram_fil_coefs_miso,

    ram_st_sst_mosi    => ram_st_sst_mosi,

    ram_st_sst_miso    => ram_st_sst_miso,

    reg_bg_ctrl_mosi   => reg_diag_bg_pfb_mosi,

    reg_bg_ctrl_miso   => reg_diag_bg_pfb_miso,

    ram_bg_data_mosi   => ram_diag_bg_pfb_mosi,

    ram_bg_data_miso   => ram_diag_bg_pfb_miso,

    in_sosi_arr        => bg_sosi_arr,

    out_sosi_arr       => out_sosi_arr

  );

  time_map : process is

    variable sim_time_str_v : string(1 to 30);  -- 30 chars should be enough

    variable sim_time_len_v : natural;

  begin

    wait for 1000 ns;

    sim_time_len_v := time'image(now)'length;

    sim_time_str_v := (others => ' ');

    sim_time_str_v(1 to sim_time_len_v) := time'image(now);

    report "Sim time string length: " & integer'image(sim_time_len_v);

    report "Sim time string.......:'" & sim_time_str_v & "'";

  end process;

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

  -- Sink: DUT output scope 

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

  gen_output_scopes : FOR I IN 0 TO c_wpfb.nof_wb_streams-1 GENERATE

    u_out_scope : ENTITY astron_sim_tools_lib.dp_wideband_wb_arr_scope

    GENERIC MAP (

      g_sim                 => TRUE,

      g_wideband_factor     => c_wpfb.wb_factor,

      g_wideband_big_endian => FALSE,

      g_dat_w               => c_wpfb.fft_out_dat_w

    )

    PORT MAP (

      SCLK         => SCLK,

      wb_sosi_arr  => out_sosi_arr((I+1)*c_wpfb.wb_factor-1 DOWNTO I*c_wpfb.wb_factor),

      scope_sosi   => scope_out_sosi(I)

    );

  END GENERATE;

  p_scope_out_index : PROCESS(SCLK)

  BEGIN

    IF rising_edge(SCLK) THEN

      IF scope_out_sosi(0).valid='1' THEN

        scope_out_index <= scope_out_index+1;

        IF scope_out_index>=g_nof_points-1 THEN

          scope_out_index <= 0;

        END IF;

      END IF;

    END IF;

  END PROCESS;

  scope_out_bin    <= fft_index_to_bin_frequency(c_wpfb.wb_factor, c_wpfb.nof_points, scope_out_index, TRUE, FALSE, TRUE);  -- complex bin

  scope_out_band   <= fft_index_to_bin_frequency(c_wpfb.wb_factor, c_wpfb.nof_points, scope_out_index, TRUE, TRUE, TRUE);   -- two real bin

  scope_out_power  <= REAL(scope_out_sosi(0).re)**2 + REAL(scope_out_sosi(0).im)**2;

  scope_out_ampl   <= SQRT(scope_out_power);

  scope_out_ampl_x <= scope_out_ampl WHEN (scope_out_bin MOD 2)=0 ELSE 0.0;

  scope_out_ampl_y <= scope_out_ampl WHEN (scope_out_bin MOD 2)=1 ELSE 0.0;

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

  -- Sink: data buffer real 

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

  u_data_buf_re : ENTITY astron_diagnostics_lib.mms_diag_data_buffer

  GENERIC MAP (

    g_nof_streams  => c_nof_streams,

    g_data_type    => e_real,

    g_data_w       => c_wpfb.fft_out_dat_w,

    g_buf_nof_data => c_bg_block_len,

    g_buf_use_sync => TRUE

  )

  PORT MAP (

    -- System

    mm_rst            => mm_rst,

    mm_clk            => mm_clk,

    dp_rst            => dp_rst,

    dp_clk            => dp_clk,

    -- MM interface

    ram_data_buf_mosi => ram_diag_data_buf_re_mosi,

    ram_data_buf_miso => ram_diag_data_buf_re_miso,

    reg_data_buf_mosi => reg_diag_data_buf_re_mosi,

    reg_data_buf_miso => reg_diag_data_buf_re_miso,

    -- ST interface

    in_sync           => out_sosi_arr(0).sync,

    in_sosi_arr       => out_sosi_arr

  );

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

  -- Sink: data buffer imag 

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

  u_data_buf_im : ENTITY astron_diagnostics_lib.mms_diag_data_buffer

  GENERIC MAP (

    g_nof_streams  => c_nof_streams,

    g_data_type    => e_imag,

    g_data_w       => c_wpfb.fft_out_dat_w,

    g_buf_nof_data => c_bg_block_len,

    g_buf_use_sync => TRUE

  )

  PORT MAP (

    -- System

    mm_rst            => mm_rst,

    mm_clk            => mm_clk,

    dp_rst            => dp_rst,

    dp_clk            => dp_clk,

    -- MM interface

    ram_data_buf_mosi => ram_diag_data_buf_im_mosi,

    ram_data_buf_miso => ram_diag_data_buf_im_miso,

    reg_data_buf_mosi => reg_diag_data_buf_im_mosi,

    reg_data_buf_miso => reg_diag_data_buf_im_miso,

    -- ST interface

    in_sync           => out_sosi_arr(0).sync,

    in_sosi_arr       => out_sosi_arr

  );

END tb;