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--------------------------------------------------------------------------------
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--
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-- Copyright (C) 2016
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-- ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>
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-- P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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--
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--------------------------------------------------------------------------------
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-- Purpose: Multi-testbench for fft_r2_par using file data
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-- Description:
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-- Verify fft_r2_par using and data generated by Matlab
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-- $RADIOHDL/applications/apertif/matlab/run_pfft.m
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--
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-- Usage:
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-- > as 4
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-- > run -all
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LIBRARY IEEE, common_pkg_lib, rTwoSDF_lib;
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USE IEEE.std_logic_1164.ALL;
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USE common_pkg_lib.common_pkg.all;
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USE rTwoSDF_lib.rTwoSDFPkg.all;
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USE work.fft_pkg.all;
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ENTITY tb_tb_fft_r2_par IS
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END tb_tb_fft_r2_par;
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ARCHITECTURE tb OF tb_tb_fft_r2_par IS
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CONSTANT c_fft_two_real : t_fft := ( true, false, true, 0, 1, 0, 128, 8, 16, 0, c_dsp_mult_w, 2, true, 56, 2);
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CONSTANT c_fft_complex : t_fft := ( true, false, false, 0, 1, 0, 64, 8, 16, 0, c_dsp_mult_w, 2, true, 56, 2);
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CONSTANT c_fft_complex_fft_shift : t_fft := ( true, true, false, 0, 1, 0, 64, 8, 16, 0, c_dsp_mult_w, 2, true, 56, 2);
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CONSTANT c_fft_complex_flipped : t_fft := (false, false, false, 0, 1, 0, 64, 8, 16, 0, c_dsp_mult_w, 2, true, 56, 2);
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CONSTANT c_diff_margin : natural := 2;
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-- Real input
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CONSTANT c_impulse_chirp : string := "data/run_pfft_m_impulse_chirp_8b_128points_16b.dat"; -- 25600 lines
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CONSTANT c_sinusoid_chirp : string := "data/run_pfft_m_sinusoid_chirp_8b_128points_16b.dat"; -- 25600 lines
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CONSTANT c_noise : string := "data/run_pfft_m_noise_8b_128points_16b.dat"; -- 1280 lines
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CONSTANT c_dc_agwn : string := "data/run_pfft_m_dc_agwn_8b_128points_16b.dat"; -- 1280 lines
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-- Complex input
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CONSTANT c_phasor_chirp : string := "data/run_pfft_complex_m_phasor_chirp_8b_64points_16b.dat"; -- 12800 lines
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CONSTANT c_phasor : string := "data/run_pfft_complex_m_phasor_8b_64points_16b.dat"; -- 320 lines
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CONSTANT c_noise_complex : string := "data/run_pfft_complex_m_noise_complex_8b_64points_16b.dat"; -- 620 lines
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-- Zero input
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CONSTANT c_zero : string := "UNUSED";
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CONSTANT c_unused : string := "UNUSED";
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SIGNAL tb_end : STD_LOGIC := '0'; -- declare tb_end to avoid 'No objects found' error on 'when -label tb_end'
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BEGIN
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-- -- DUT generics
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-- g_fft : t_fft := (true, false, true, 0, 1, 0, 128, 9, 16, 0, c_dsp_mult_w, 2, true, 56, 2);
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-- -- type t_rtwo_fft is record
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-- -- use_reorder : boolean; -- = false for bit-reversed output, true for normal output
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-- -- 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
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-- -- use_separate : boolean; -- = false for complex input, true for two real inputs
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-- -- nof_chan : natural; -- = default 0, defines the number of channels (=time-multiplexed input signals): nof channels = 2**nof_chan
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-- -- wb_factor : natural; -- = default 1, wideband factor
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-- -- twiddle_offset : natural; -- = default 0, twiddle offset for PFT sections in a wideband FFT
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-- -- nof_points : natural; -- = 1024, N point FFT
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-- -- in_dat_w : natural; -- = 8, number of input bits
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-- -- out_dat_w : natural; -- = 13, number of output bits, bit growth: in_dat_w + natural((ceil_log2(nof_points))/2 + 2)
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-- -- out_gain_w : natural; -- = 0, output gain factor applied after the last stage output, before requantization to out_dat_w
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-- -- stage_dat_w : natural; -- = 18, data width used between the stages(= DSP multiplier-width)
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-- -- guard_w : natural; -- = 2, Guard used to avoid overflow in FFT stage.
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-- -- guard_enable : boolean; -- = true when input needs guarding, false when input requires no guarding but scaling must be skipped at the last stage(s) (used in wb fft)
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-- -- stat_data_w : positive; -- = 56 (= 18b+18b)+log2(781250)
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-- -- stat_data_sz : positive; -- = 2 (complex re and im)
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-- -- end record;
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-- --
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-- -- TB generics
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-- g_diff_margin : integer := 2; -- maximum difference between HDL output and expected output (> 0 to allow minor rounding differences)
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-- -- Two real input data files A and B used when g_fft.use_separate = true
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-- g_data_file_a : string := "data/run_pfft_m_impulse_chirp_8b_128points_16b.dat"; -- real input data and expected output data for 1 stream, or zeros when UNUSED
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-- g_data_file_a_nof_lines : natural := 25600; -- number of lines with input data that is available in the g_data_file_a
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-- g_data_file_b : string := "UNUSED";
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-- g_data_file_b_nof_lines : natural := 25600; -- number of lines with input data that is available in the g_data_file_b
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-- -- One complex input data file C used when g_fft.use_separate = false
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-- g_data_file_c : string := "data/run_pfft_complex_m_phasor_8b_64points_16b.dat";
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-- g_data_file_c_nof_lines : natural := 320;
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-- g_data_file_nof_lines : natural := 320;
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-- g_enable_in_val_gaps : boolean := FALSE -- when false then in_val flow control active continuously, else with random inactive gaps
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-- Two real input data A and B
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u_act_two_real_chirp : ENTITY work.tb_fft_r2_par GENERIC MAP (c_fft_two_real, c_diff_margin, c_sinusoid_chirp, 25600, c_impulse_chirp, 25600, c_unused, 0, 25600, FALSE);
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u_act_two_real_a0 : ENTITY work.tb_fft_r2_par GENERIC MAP (c_fft_two_real, c_diff_margin, c_zero, 25600, c_impulse_chirp, 25600, c_unused, 0, 5120, FALSE);
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u_act_two_real_b0 : ENTITY work.tb_fft_r2_par GENERIC MAP (c_fft_two_real, c_diff_margin, c_sinusoid_chirp, 25600, c_zero, 25600, c_unused, 0, 5120, FALSE);
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u_rnd_two_real_noise : ENTITY work.tb_fft_r2_par GENERIC MAP (c_fft_two_real, c_diff_margin, c_noise, 1280, c_dc_agwn, 1280, c_unused, 0, 1280, TRUE);
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-- Complex input data
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u_act_complex_chirp : ENTITY work.tb_fft_r2_par GENERIC MAP (c_fft_complex, c_diff_margin, c_unused, 0, c_unused, 0, c_phasor_chirp, 12800, 12800, FALSE);
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u_act_complex_fft_shift : ENTITY work.tb_fft_r2_par GENERIC MAP (c_fft_complex_fft_shift, c_diff_margin, c_unused, 0, c_unused, 0, c_phasor_chirp, 12800, 1280, FALSE);
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u_act_complex_flipped : ENTITY work.tb_fft_r2_par GENERIC MAP (c_fft_complex_flipped, c_diff_margin, c_unused, 0, c_unused, 0, c_phasor_chirp, 12800, 1280, FALSE);
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u_rnd_complex_noise : ENTITY work.tb_fft_r2_par GENERIC MAP (c_fft_complex, c_diff_margin, c_unused, 0, c_unused, 0, c_noise_complex, 640, 640, TRUE);
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END tb;
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