From 7e557b924b843e2c50184e905cea2e500e846627 Mon Sep 17 00:00:00 2001
From: Reinier van der Walle <walle@astron.nl>
Date: Fri, 12 Aug 2022 10:22:11 +0200
Subject: [PATCH] added dp_pipeline_ready to ease timing closure
---
.../sdp/src/vhdl/sdp_beamformer_output.vhd | 38 +++++++++++++------
1 file changed, 27 insertions(+), 11 deletions(-)
diff --git a/applications/lofar2/libraries/sdp/src/vhdl/sdp_beamformer_output.vhd b/applications/lofar2/libraries/sdp/src/vhdl/sdp_beamformer_output.vhd
index b7638e6df6..091abd86db 100644
--- a/applications/lofar2/libraries/sdp/src/vhdl/sdp_beamformer_output.vhd
+++ b/applications/lofar2/libraries/sdp/src/vhdl/sdp_beamformer_output.vhd
@@ -83,15 +83,17 @@ ARCHITECTURE str OF sdp_beamformer_output IS
CONSTANT c_fifo_fill : NATURAL := c_sdp_cep_payload_nof_longwords;
CONSTANT c_fifo_size : NATURAL := c_fifo_fill*2; -- Make fifo size large enough for adding header and muxing beamsets.
- SIGNAL snk_in_concat : t_dp_sosi;
- SIGNAL dp_packet_merge_src_out : t_dp_sosi;
- SIGNAL dp_repack_data_src_out : t_dp_sosi;
- SIGNAL dp_fifo_sc_src_out : t_dp_sosi;
- SIGNAL dp_fifo_sc_src_in : t_dp_siso;
- SIGNAL dp_offload_tx_src_out : t_dp_sosi;
- SIGNAL dp_offload_tx_src_in : t_dp_siso;
- SIGNAL ip_checksum_src_out : t_dp_sosi;
- SIGNAL ip_checksum_src_in : t_dp_siso;
+ SIGNAL snk_in_concat : t_dp_sosi;
+ SIGNAL dp_packet_merge_src_out : t_dp_sosi;
+ SIGNAL dp_repack_data_src_out : t_dp_sosi;
+ SIGNAL dp_fifo_sc_src_out : t_dp_sosi;
+ SIGNAL dp_fifo_sc_src_in : t_dp_siso;
+ SIGNAL dp_offload_tx_src_out : t_dp_sosi;
+ SIGNAL dp_offload_tx_src_in : t_dp_siso;
+ SIGNAL ip_checksum_src_out : t_dp_sosi;
+ SIGNAL ip_checksum_src_in : t_dp_siso;
+ SIGNAL dp_pipeline_ready_src_out : t_dp_sosi;
+ SIGNAL dp_pipeline_ready_src_in : t_dp_siso;
SIGNAL common_fifo_rd_req : STD_LOGIC;
SIGNAL payload_err : STD_LOGIC_VECTOR(0 DOWNTO 0);
@@ -269,6 +271,20 @@ BEGIN
src_in => ip_checksum_src_in
);
+ -------------------------------------------------------------------------------
+ -- dp_pipeline_ready to ease timing closure
+ -------------------------------------------------------------------------------
+ u_dp_pipeline_ready : ENTITY dp_lib.dp_pipeline_ready
+ PORT MAP(
+ rst => dp_rst,
+ clk => dp_clk,
+
+ snk_out => ip_checksum_src_in,
+ snk_in => ip_checksum_src_out,
+ src_in => dp_pipeline_ready_src_in,
+ src_out => dp_pipeline_ready_src_out
+ );
+
-------------------------------------------------------------------------------
-- mms_dp_xonoff
-------------------------------------------------------------------------------
@@ -289,8 +305,8 @@ BEGIN
dp_clk => dp_clk,
-- ST sinks
- snk_out_arr(0) => ip_checksum_src_in,
- snk_in_arr(0) => ip_checksum_src_out,
+ snk_out_arr(0) => dp_pipeline_ready_src_in,
+ snk_in_arr(0) => dp_pipeline_ready_src_out,
-- ST source
src_in_arr(0) => src_in,
src_out_arr(0) => out_sosi
--
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