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------------------------------------------------------------------------------- -- -- 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_wpfb_unit_dev 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 := 8; -- = 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_prefilter : BOOLEAN := FALSE; --TRUE; g_use_separate : BOOLEAN := FALSE; -- = false for complex input, true for two real inputs g_use_bg : BOOLEAN := FALSE; g_coefs_file_prefix : STRING := "hex/chan_fil_coefs_wide" ); END tb_wpfb_unit_dev; ARCHITECTURE tb OF tb_wpfb_unit_dev IS CONSTANT c_wpfb : t_wpfb := (g_wb_factor, g_nof_points, g_nof_chan, g_nof_wb_streams, g_nof_taps, 0, g_in_dat_w, 16, 16, true, false, g_use_separate, 16, g_out_dat_w, 0, 18, 2, true, 56, 2, 20, 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 -- -- -- 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_dev GENERIC MAP( g_wpfb => c_wpfb, g_use_bg => g_use_bg, g_use_prefilter => g_use_prefilter, 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;