From b8fef62d328df87fe97d2032eb593d6ad0c04831 Mon Sep 17 00:00:00 2001
From: Daniel van der Schuur <schuur@astron.nl>
Date: Thu, 18 Dec 2014 09:01:02 +0000
Subject: [PATCH] -Updated constants and generics to use input folding.
---
.../src/vhdl/unb1_apertif_correlator.vhd | 75 +++----------------
1 file changed, 12 insertions(+), 63 deletions(-)
diff --git a/applications/apertif_unb1_correlator/src/vhdl/unb1_apertif_correlator.vhd b/applications/apertif_unb1_correlator/src/vhdl/unb1_apertif_correlator.vhd
index afa2ca8257..32b5fb6dbf 100644
--- a/applications/apertif_unb1_correlator/src/vhdl/unb1_apertif_correlator.vhd
+++ b/applications/apertif_unb1_correlator/src/vhdl/unb1_apertif_correlator.vhd
@@ -67,7 +67,7 @@ END apertif_unb1_correlator;
ARCHITECTURE str OF apertif_unb1_correlator IS
-- Firmware version x.y
- CONSTANT c_fw_version : t_unb1_board_fw_version := (1, 1);
+ CONSTANT c_fw_version : t_unb1_board_fw_version := (0, 1);
-- In simulation we don't need the 1GbE core for MM control, deselect it in c_use_phy based on g_sim
CONSTANT c_use_phy : t_c_unb1_board_use_phy := (sel_a_b(g_sim, 0, 1), 0, 0, 0, 0, 0, 0, 1);
@@ -117,6 +117,8 @@ ARCHITECTURE str OF apertif_unb1_correlator IS
-- Correlator
CONSTANT c_nof_inputs : NATURAL := 24;
+ 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_conjugate : BOOLEAN := TRUE;
@@ -125,12 +127,9 @@ ARCHITECTURE str OF apertif_unb1_correlator IS
CONSTANT c_nof_visibilities : NATURAL := (c_nof_inputs*(c_nof_inputs+1))/2;
- -- Gap size on the correlator input depends on the number of folds
- CONSTANT c_block_period : NATURAL := pow2(c_nof_pre_mult_folds);
-
-- Block generator
- CONSTANT c_bg_block_size : NATURAL := c_nof_channels;
- CONSTANT c_bg_gapsize : NATURAL := c_bg_block_size*(c_block_period-1);
+ CONSTANT c_bg_block_size : NATURAL := c_nof_channels*pow2(c_nof_input_folds);
+ CONSTANT c_bg_gapsize : NATURAL := 0;
-- Indicate the integration period with the sync. In the correlator, the
-- integration period is forced to a minimum of c_nof_visibilities to
@@ -148,12 +147,7 @@ ARCHITECTURE str OF apertif_unb1_correlator IS
TO_UVEC( c_bg_block_size-1, c_diag_bg_mem_high_adrs_w),
TO_UVEC( 0, c_diag_bg_bsn_init_w));
- SIGNAL block_gen_src_out_arr : t_dp_sosi_arr(c_nof_inputs-1 DOWNTO 0);
-
- SIGNAL dp_fifo_sc_src_out_arr : t_dp_sosi_arr(c_nof_inputs-1 DOWNTO 0);
- SIGNAL dp_fifo_sc_src_in_arr : t_dp_siso_arr(c_nof_inputs-1 DOWNTO 0);
-
- SIGNAL correlator_snk_in_arr : t_dp_sosi_arr(c_nof_inputs-1 DOWNTO 0);
+ SIGNAL correlator_snk_in_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_diag_data_buf_mosi : t_mem_mosi;
@@ -165,17 +159,17 @@ BEGIN
-----------------------------------------------------------------------------
-- Block generators
- -- . Each stream in block_gen_src_out_arr contains complex subband samples
+ -- . 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_inputs,
+ 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),
+ 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_diag_block_gen_rst => c_bg_ctrl
)
PORT MAP (
@@ -185,61 +179,16 @@ BEGIN
dp_rst => dp_rst,
dp_clk => dp_clk,
- out_sosi_arr => block_gen_src_out_arr
+ out_sosi_arr => correlator_snk_in_arr
);
- -----------------------------------------------------------------------------
- -- Introduce gaps in the input stream
- -- . mms_diag_block_gen does not support gaps within blocks.
- -- . We'll use FIFO buffers and dp_gap to read out the FIFOs to introduce
- -- gaps.
- -----------------------------------------------------------------------------
- gen_dp_fifo_sc : FOR i IN 0 TO c_nof_inputs-1 GENERATE
- u_dp_fifo_sc : ENTITY dp_lib.dp_fifo_sc
- GENERIC MAP (
- g_data_w => 2*c_complex_data_w,
- g_use_ctrl => FALSE,
- g_use_complex => TRUE,
- g_fifo_size => c_nof_channels,
- g_fifo_af_margin => 0
- )
- PORT MAP (
- rst => dp_rst,
- clk => dp_clk,
-
- wr_ful => OPEN,
- usedw => OPEN,
- rd_emp => OPEN,
-
- snk_out => OPEN,
- snk_in => block_gen_src_out_arr(i),
- src_in => dp_fifo_sc_src_in_arr(i),
- src_out => dp_fifo_sc_src_out_arr(i)
- );
- END GENERATE;
-
- gen_dp_src_out_timer : FOR i IN 0 TO c_nof_inputs-1 GENERATE
- u_dp_src_out_timer : ENTITY dp_lib.dp_src_out_timer
- GENERIC MAP (
- g_block_period => c_block_period
- )
- PORT MAP (
- rst => dp_rst,
- clk => dp_clk,
-
- snk_in => dp_fifo_sc_src_out_arr(i),
- snk_out => dp_fifo_sc_src_in_arr(i)
- );
- END GENERATE;
-
- correlator_snk_in_arr <= dp_fifo_sc_src_out_arr;
-
-----------------------------------------------------------------------------
-- Correlator
-----------------------------------------------------------------------------
u_correlator : ENTITY correlator_lib.correlator
GENERIC MAP (
- g_nof_inputs => c_nof_inputs,
+ 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,
--
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