-Added gen_hex_files_composite_signals.py to create (composite) complex sine

 waves and write them to HEX files used by the block gens;
-Added dp_stream_rec_play to apertif_unb1_correlator to record the WPFB output;
-Added tc_wpfb_src_out_arr.py to read and plot the recorded WPFB output;
 . Not working yet - the WPFB output does not resemble s spectrum.
-Commented out the correlator as the WPFB is now the main DUT.

Happy holidays!

applications/apertif_unb1_correlator/src/hex/composite_signals_0.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_1.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_10.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_11.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_2.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_3.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_4.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_5.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_6.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_7.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_8.hex

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applications/apertif_unb1_correlator/src/hex/composite_signals_9.hex

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applications/apertif_unb1_correlator/src/python/gen_hex_files_composite_signals.py

+###############################################################################
+#
+# Copyright (C) 2014
+# 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/>.
+#
+###############################################################################
+
+from common import *
+from common_dsp import *
+from mem_init_file import list_to_hex
+
+import matplotlib.pyplot as plt
+import numpy as np
+from scipy.fftpack import fft,ifft, fftfreq, fftshift
+
+# Purpose:
+# . Generate the NOF_INPUTS HEX files for the block generators that feed the WPFB
+# Description:
+# . 
+
+NOF_INPUTS = 12
+COMPLEX_WIDTH = 6
+NOF_WORDS_PER_BLOCK = 64
+MEM_WIDTH  = COMPLEX_WIDTH*2
+MEM_DEPTH  = 2*NOF_WORDS_PER_BLOCK # We're interleaving, hence twice the depth
+
+PATH = "../hex"
+FILENAME = "composite_signals"
+
+###############################################################################
+# Create a 120MHz sine wave
+###############################################################################
+N = NOF_WORDS_PER_BLOCK
+t=range(N)
+
+# sample spacing
+T = 1.0 / N
+
+x = np.linspace(0.0, N*T, N)
+
+AMPL = 31 # 5 bits + sign available
+# my singal
+#s0 = 7 * np.exp( 1 * 1.j * 2.0*np.pi*x)
+#s1 = 7 * np.exp( 5 * 1.j * 2.0*np.pi*x)
+#s2 = 7 * np.exp( 10 * 1.j * 2.0*np.pi*x)
+#s3 = 7 * np.exp( 15 * 1.j * 2.0*np.pi*x)
+s4 =  31 * np.exp( 8 * 1.j * 2.0*np.pi*x)
+
+s = s4 #  +s1 + s2 + s3 + s4
+################################################################################
+## Plot the signal
+################################################################################
+plt.plot(t, s.real, 'b-', t, s.imag, 'r--')
+plt.legend(('real', 'imaginary'))
+plt.show()
+#
+################################################################################
+## Plot FFT
+################################################################################
+yf = fft(s)
+xf = fftfreq(N, T)
+xf = fftshift(xf)
+yplot = fftshift(yf)
+plt.plot(xf, 1.0/N * np.abs(yplot))
+plt.grid()
+plt.show()
+
+###############################################################################
+# Convert complex floats to concatenated integers
+###############################################################################
+concat_list = concat_complex(s, COMPLEX_WIDTH)
+
+###############################################################################
+# Interleave 2 lists into one
+###############################################################################
+inter_list = interleave([concat_list,concat_list])
+
+###############################################################################
+# Use this list for each block generator
+###############################################################################
+bg_lists = NOF_INPUTS*[inter_list]
+
+###############################################################################
+# Write the HEX files
+############################################################################### 
+for input_nr in range(NOF_INPUTS):
+    list_to_hex( bg_lists[input_nr], PATH+"/"+FILENAME+'_'+str(input_nr)+".hex", MEM_WIDTH, MEM_DEPTH)
+

applications/apertif_unb1_correlator/src/vhdl/apertif_unb1_correlator.vhd

@@ -122,37 +122,35 @@ ARCHITECTURE str OF apertif_unb1_correlator IS
   SIGNAL eth1g_ram_mosi             : t_mem_mosi;  -- ETH rx frame and tx frame memory
   SIGNAL eth1g_ram_miso             : t_mem_miso;
   
-  -- WPFB
-  CONSTANT c_wpfb_wb_factor         : NATURAL := 1;      -- = default 1, wideband factor
-  CONSTANT c_wpfb_nof_wb_streams    : NATURAL := 12;     -- = 1, the number of parallel wideband streams. The fi
-  CONSTANT c_wpfb_nof_chan          : NATURAL := 1;      -- = default 0, defines the number of channels (=time-m
-  CONSTANT c_wpfb_nof_points        : NATURAL := 64;     -- = 1024, N point FFT
-  CONSTANT c_wpfb_nof_taps          : NATURAL := 8;      -- = 8 nof taps n the filter
-  CONSTANT c_wpfb_in_dat_w          : NATURAL := 6;      -- = 8, number of input bits                           
-  CONSTANT c_wpfb_out_dat_w         : NATURAL := 12;     -- = 14, number of output bits: in_dat_w + natural((cei
-  CONSTANT c_wpfb_use_separate      : BOOLEAN := FALSE;  -- = false for complex input, true for two real inputs
-
-
-
-  CONSTANT c_wpfb : t_wpfb  := (c_wpfb_wb_factor, c_wpfb_nof_points, c_wpfb_nof_chan, c_wpfb_nof_wb_streams,
-                                c_wpfb_nof_taps, c_wpfb_in_dat_w, 16, 16,
-                                true, c_wpfb_use_separate, 16, c_wpfb_out_dat_w, 18, 2, true, 56, 2,                      
-                                c_fft_pipeline, c_fft_pipeline, c_fil_ppf_pipeline);
-
-  CONSTANT c_wpfb_coefs_file_prefix : STRING  := "../../../../../UniBoard/trunk/Firmware/dsp/filter/build/data/coefs_wide1_p64_t8";
-
   -- Correlator
-  CONSTANT c_nof_inputs             : NATURAL := 24;
+  CONSTANT c_nof_inputs             : NATURAL := 2;
   CONSTANT c_nof_input_folds        : NATURAL := 1;
   CONSTANT c_nof_input_streams      : NATURAL := c_nof_inputs / pow2(c_nof_input_folds);
   CONSTANT c_nof_pre_mult_folds     : NATURAL := 1; 
-  CONSTANT c_complex_data_w         : NATURAL := 8;
+  CONSTANT c_complex_data_w         : NATURAL := 6; -- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
   CONSTANT c_conjugate              : BOOLEAN := TRUE;
   CONSTANT c_nof_channels           : NATURAL := 64;
   CONSTANT c_integration_period     : NATURAL := 12208;
 
   CONSTANT c_nof_visibilities       : NATURAL := (c_nof_inputs*(c_nof_inputs+1))/2;
 
+  -- WPFB
+  CONSTANT c_wpfb_wb_factor         : NATURAL := 1;                    -- = default 1, wideband factor
+  CONSTANT c_wpfb_nof_wb_streams    : NATURAL := c_nof_input_streams;  -- = 1, the number of parallel wideband streams. The fi
+  CONSTANT c_wpfb_nof_chan          : NATURAL := 1;                    -- = default 0, defines the number of channels (=time-m
+  CONSTANT c_wpfb_nof_points        : NATURAL := 64;                   -- = 1024, N point FFT
+  CONSTANT c_wpfb_nof_taps          : NATURAL := 8;                    -- = 8 nof taps n the filter
+  CONSTANT c_wpfb_in_dat_w          : NATURAL := 6;                    -- = 8, number of input bits                           
+  CONSTANT c_wpfb_out_dat_w         : NATURAL := 12;                   -- = 14, number of output bits: in_dat_w + natural((cei
+  CONSTANT c_wpfb_use_separate      : BOOLEAN := FALSE;                -- = false for complex input, true for two real inputs
+
+  CONSTANT c_wpfb : t_wpfb  := (c_wpfb_wb_factor, c_wpfb_nof_points, c_wpfb_nof_chan, c_wpfb_nof_wb_streams,
+                                c_wpfb_nof_taps, c_wpfb_in_dat_w, 16, 16,
+                                true, c_wpfb_use_separate, 16, c_wpfb_out_dat_w, 18, 2, true, 56, 2,                      
+                                c_fft_pipeline, c_fft_pipeline, c_fil_ppf_pipeline);
+
+  CONSTANT c_wpfb_coefs_file_prefix : STRING  := "../../../../../UniBoard/trunk/Firmware/dsp/filter/build/data/coefs_wide1_p64_t8";
+
   -- Block generator
   CONSTANT c_bg_block_size          : NATURAL := c_nof_channels*pow2(c_nof_input_folds);
   CONSTANT c_bg_gapsize             : NATURAL := 0;
@@ -174,7 +172,7 @@ ARCHITECTURE str OF apertif_unb1_correlator IS
                                                           TO_UVEC(                   0, c_diag_bg_bsn_init_w));
 
   SIGNAL wpfb_snk_in_arr            : t_dp_sosi_arr(c_nof_input_streams-1 DOWNTO 0);
-  SIGNAL correlator_snk_in_arr      : t_dp_sosi_arr(c_nof_input_streams-1 DOWNTO 0);
+  SIGNAL wpfb_src_out_arr           : t_dp_sosi_arr(c_nof_input_streams-1 DOWNTO 0);
   SIGNAL correlator_src_out_arr     : t_dp_sosi_arr(1-1 DOWNTO 0);
 
   SIGNAL ram_fil_coefs_mosi         : t_mem_mosi;
@@ -189,17 +187,13 @@ BEGIN
 
   -----------------------------------------------------------------------------
   -- Block generators
-  -- . Each stream in correlator_snk_in_arr contains complex subband samples
-  --   from one 'antenna'.
-  -- . These complex subband samples are generated and converted to a HEX RAM
-  --   initialization file using Python, see tb/python/gen_subband_hex_files.py
   -----------------------------------------------------------------------------
   u_mms_diag_block_gen : ENTITY diag_lib.mms_diag_block_gen
   GENERIC MAP (
     g_nof_output_streams => c_nof_input_streams,
     g_buf_dat_w          => 2*c_complex_data_w,
     g_buf_addr_w         => ceil_log2(TO_UINT(c_bg_ctrl.samples_per_packet)),
-    g_file_name_prefix   => "../../../libraries/dsp/correlator/src/hex/complex_subbands_" & NATURAL'IMAGE(c_complex_data_w) & "b_" & "fold_" & NATURAL'IMAGE(c_nof_input_folds),
+    g_file_name_prefix   => "../../../applications/apertif_unb1_correlator/src/hex/composite_signals",
     g_diag_block_gen_rst => c_bg_ctrl
   )
   PORT MAP (
@@ -237,55 +231,74 @@ BEGIN
     ram_bg_data_mosi   => c_mem_mosi_rst,
     ram_bg_data_miso   => OPEN,
     in_sosi_arr        => wpfb_snk_in_arr,     
-    out_sosi_arr       => correlator_snk_in_arr
+    out_sosi_arr       => wpfb_src_out_arr
   ); 
 
   -----------------------------------------------------------------------------
-  -- Correlator
+  -- Stream recorder to record the WPFB output stream to a file
   -----------------------------------------------------------------------------
-  u_correlator : ENTITY correlator_lib.correlator
+  u_dp_stream_rec_play : ENTITY dp_lib.dp_stream_rec_play
   GENERIC MAP (
-    g_nof_input_streams  => c_nof_input_streams,
-    g_nof_input_folds    => c_nof_input_folds,
-    g_nof_pre_mult_folds => c_nof_pre_mult_folds,
-    g_data_w             => c_complex_data_w,
-    g_conjugate          => c_conjugate,
-    g_nof_channels       => c_nof_channels,
-    g_integration_period => c_integration_period
+    g_sim            => TRUE,
+    g_pass_through   => FALSE,
+    g_rec_not_play   => TRUE,
+    g_rec_play_file  => "../../../applications/apertif_unb1_correlator/tb/rec/wpfb_src_out_arr0.rec",
+    g_record_invalid => FALSE
   )
   PORT MAP (
-    clk         => dp_clk,
-    rst         => dp_rst,
-
-    snk_in_arr  => correlator_snk_in_arr,
-    src_out_arr => correlator_src_out_arr
+    dp_clk  => dp_clk,
+    snk_in  => wpfb_src_out_arr(0),
+    snk_out => OPEN,
+    src_out => OPEN,
+    src_in  => c_dp_siso_rdy
   );
 
   -----------------------------------------------------------------------------
-  -- Data buffer to be read out by Python
+  -- Correlator
   -----------------------------------------------------------------------------
-  u_diag_data_buffer : ENTITY diag_lib.mms_diag_data_buffer
-  GENERIC MAP (    
-    g_nof_streams  => 1,
-    g_data_w       => 64,
-    g_data_type    => e_complex,
-    g_buf_nof_data => c_nof_visibilities,
-    g_buf_use_sync => TRUE 
-  )
-  PORT MAP (
-    mm_rst            => mm_rst,
-    mm_clk            => mm_clk,
-    dp_rst            => dp_rst,
-    dp_clk            => dp_clk,
-
-    ram_data_buf_mosi => ram_diag_data_buf_mosi,
-    ram_data_buf_miso => ram_diag_data_buf_miso,
-    reg_data_buf_mosi => reg_diag_data_buf_mosi,
-    reg_data_buf_miso => reg_diag_data_buf_miso,
-
-    in_sync           => correlator_src_out_arr(0).sop,
-    in_sosi_arr       => correlator_src_out_arr
-  );
+--  u_correlator : ENTITY correlator_lib.correlator
+--  GENERIC MAP (
+--    g_nof_input_streams  => c_nof_input_streams,
+--    g_nof_input_folds    => c_nof_input_folds,
+--    g_nof_pre_mult_folds => c_nof_pre_mult_folds,
+--    g_data_w             => c_complex_data_w,
+--    g_conjugate          => c_conjugate,
+--    g_nof_channels       => c_nof_channels,
+--    g_integration_period => c_integration_period
+--  )
+--  PORT MAP (
+--    clk         => dp_clk,
+--    rst         => dp_rst,
+--
+--    snk_in_arr  => wpfb_src_out_arr,
+--    src_out_arr => correlator_src_out_arr
+--  );
+--
+--  -----------------------------------------------------------------------------
+--  -- Data buffer to be read out by Python
+--  -----------------------------------------------------------------------------
+--  u_diag_data_buffer : ENTITY diag_lib.mms_diag_data_buffer
+--  GENERIC MAP (    
+--    g_nof_streams  => 1,
+--    g_data_w       => 64,
+--    g_data_type    => e_complex,
+--    g_buf_nof_data => c_nof_visibilities,
+--    g_buf_use_sync => TRUE 
+--  )
+--  PORT MAP (
+--    mm_rst            => mm_rst,
+--    mm_clk            => mm_clk,
+--    dp_rst            => dp_rst,
+--    dp_clk            => dp_clk,
+--
+--    ram_data_buf_mosi => ram_diag_data_buf_mosi,
+--    ram_data_buf_miso => ram_diag_data_buf_miso,
+--    reg_data_buf_mosi => reg_diag_data_buf_mosi,
+--    reg_data_buf_miso => reg_diag_data_buf_miso,
+--
+--    in_sync           => correlator_src_out_arr(0).sop,
+--    in_sosi_arr       => correlator_src_out_arr
+--  );
 
   -----------------------------------------------------------------------------
   -- General control function

applications/apertif_unb1_correlator/tb/python/tc_wpfb_src_out_arr.py

+
+from common import *
+import os
+import matplotlib.pyplot as plt
+import numpy as np
+from scipy.fftpack import fft,ifft, fftfreq, fftshift
+
+REC_FILE = os.environ['RADIOHDL']+'/applications/apertif_unb1_correlator/tb/rec/wpfb_src_out_arr0.rec'
+
+WPFB_OUT_DATA_WIDTH = 12
+
+################################################################################
+# Read the lines from the file and turn them into a list
+################################################################################
+with open (REC_FILE, "r") as recfile:
+    lines = recfile.read().splitlines()
+
+################################################################################
+# Extract the complex fields; create new complex list
+################################################################################
+complex_list = []
+raw_data_int = []
+raw_data_str = []
+
+for line_nr,line in enumerate(lines):
+#    line = line.replace('X', '0') # Get rid of the 'X' on bit 24 (we only use 0..23)
+    split_line = line.split(' ')
+
+#    print split_line
+    str_re = split_line[3]
+    str_im = split_line[4]
+    raw_data_str.append( [str_re, str_im] )
+
+    re = to_signed(int(str_re, 32), WPFB_OUT_DATA_WIDTH)
+    im = to_signed(int(str_im, 32), WPFB_OUT_DATA_WIDTH) 
+    raw_data_int.append( [re, im] )
+    complex_word = complex(re,im)
+    complex_list.append( complex_word )
+
+################################################################################
+# Split the list into chunks of 128 (note SOP/EOP tags of WPFB output are
+# incorrect:64 samples/block instead of 128).
+################################################################################
+complex_list_128 = split_list(complex_list, 128)
+f = deinterleave(complex_list_128[5], 2)[1]
+
+#complex_list_64 = split_list(complex_list, 64)
+#f = complex_list_64[6]
+
+################################################################################
+## Plot FFT
+################################################################################
+N=64
+T = 1.0 / N
+
+yf = fft(f)
+xf = fftfreq(N, T)
+xf = fftshift(xf)
+yplot = fftshift(yf)
+plt.plot(xf, 1.0/N * np.abs(yplot))
+plt.grid()
+plt.show()
+