Reinier van der Walle
--- a/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+++ b/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+
+-- Author:
+-- . Reinier van der Walle
+-- Purpose:
+-- . Bridge between AXI4 stream and DP stream interfaces. 
+-- Description:
+-- . This core consists of:
+--   . Combinatorial translation of one interface to the other.
+--   . SOP insertion for AXI4 -> DP as AXI4 does not have a SOP equivalent.
+--   . Implementation for deriving dp.empty from axi4.tkeep (see details).
+--   . Ready latency adapters. 
+-- . Details:
+--   . g_nof_bytes is used to indicate the number of bytes in the data field. Only 
+--     used for deriving the DP empty field.
+--   . g_use_empty: when true, it will derive the DP empty field from the AXI4 tkeep signal. 
+--     tkeep is the AXI4 signal that indicates with a bit for each byte of the data wheter 
--- a/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+++ b/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+--   . Ready latency adapters. 
+-- . Details:
+--   . g_nof_bytes is used to indicate the number of bytes in the data field. Only 
+--     used for deriving the DP empty field.
+--   . g_use_empty: when true, it will derive the DP empty field from the AXI4 tkeep signal. 
+--     tkeep is the AXI4 signal that indicates with a bit for each byte of the data wheter 
+--     it is considered a valid or null byte. '1' for a valid byte or '0' for a null byte.
+--     The DP empty field is derived by counting the number of '0' bits in 
+--     tkeep(g_nof_bytes DOWNTO 0). This means that it is only possible to derive the empty
+--     field correctly when tkeep only has bits set to '0' at the end of the vector. For example:
+--     . tkeep = "11111000" is valid and will translate to empty = 0011 (3 Decimal).
+--     . tkeep = "11011101" is not valid.
+--   . g_axi4_rl is the ready latency of the axi4_in/out interfaces.
+--   . g_dp_rl is the ready latency of the dp_in/out interfaces.
+--   . g_active_low_rst should be set to TRUE when in_rst is active low. This is useful as an
+--     AXI4 interface oftem comes with an active-low reset while DP comes with an active-high 
--- a/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+++ b/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+-- . This core consists of:
+--   . Combinatorial translation of one interface to the other.
+--   . SOP insertion for AXI4 -> DP as AXI4 does not have a SOP equivalent.
+--   . Implementation for deriving dp.empty from axi4.tkeep (see details).
+--   . Ready latency adapters. 
+-- . Details:
+--   . g_nof_bytes is used to indicate the number of bytes in the data field. Only 
+--     used for deriving the DP empty field.
+--   . g_use_empty: when true, it will derive the DP empty field from the AXI4 tkeep signal. 
+--     tkeep is the AXI4 signal that indicates with a bit for each byte of the data wheter 
+--     it is considered a valid or null byte. '1' for a valid byte or '0' for a null byte.
+--     The DP empty field is derived by counting the number of '0' bits in 
+--     tkeep(g_nof_bytes DOWNTO 0). This means that it is only possible to derive the empty
+--     field correctly when tkeep only has bits set to '0' at the end of the vector. For example:
+--     . tkeep = "11111000" is valid and will translate to empty = 0011 (3 Decimal).
+--     . tkeep = "11011101" is not valid.
--- a/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+++ b/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+-- Author:
+-- . Reinier van der Walle
+-- Purpose:
+-- . Bridge between AXI4 stream and DP stream interfaces. 
+-- Description:
+-- . This core consists of:
+--   . Combinatorial translation of one interface to the other.
+--   . SOP insertion for AXI4 -> DP as AXI4 does not have a SOP equivalent.
+--   . Implementation for deriving dp.empty from axi4.tkeep (see details).
+--   . Ready latency adapters. 
+-- . Details:
+--   . g_nof_bytes is used to indicate the number of bytes in the data field. Only 
+--     used for deriving the DP empty field.
+--   . g_use_empty: when true, it will derive the DP empty field from the AXI4 tkeep signal. 
+--     tkeep is the AXI4 signal that indicates with a bit for each byte of the data wheter 
+--     it is considered a valid or null byte. '1' for a valid byte or '0' for a null byte.
--- a/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+++ b/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+USE dp_lib.dp_stream_pkg.ALL;
+USE work.axi4_stream_pkg.ALL;
+
+ENTITY axi4_stream_dp_bridge IS
+  GENERIC (
+    g_nof_bytes      : NATURAL := 64; -- Max = 64 bytes
+    g_use_empty      : BOOLEAN := FALSE; -- When True the dp empty field is derived from axi4 tkeep.
+    g_axi4_rl        : NATURAL := 0;
+    g_dp_rl          : NATURAL := 1;
+    g_active_low_rst : BOOLEAN := FALSE -- When True, in_rst is interpreted as active-low.
+  );
+  PORT (
+    in_clk : IN STD_LOGIC := '0';
+    in_rst : IN STD_LOGIC := is_true(g_active_low_rst); -- Default state is "not in reset".
+
+    aclk   : OUT STD_LOGIC := '0'; -- AXI4 clk
--- a/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+++ b/libraries/base/axi4/src/vhdl/axi4_stream_dp_bridge.vhd 0 → 100644
+  SIGNAL dp_from_axi4_siso : t_dp_siso;
+
+  TYPE t_reg IS RECORD
+    r_eop             : STD_LOGIC;
+    dp_from_axi4_sosi : t_dp_sosi;
+  END RECORD;
+
+  CONSTANT c_reg_init         : t_reg := ('1', c_dp_sosi_rst) ;
+
+  -- Registers
+  SIGNAL d_reg                : t_reg := c_reg_init;
+  SIGNAL q_reg                : t_reg := c_reg_init;
+
+BEGIN
+  i_rst   <= NOT in_rst WHEN g_active_low_rst ELSE in_rst;
+  aclk    <= in_clk;
--- a/libraries/base/axi4/src/vhdl/axi4_stream_pkg.vhd 0 → 100644
+++ b/libraries/base/axi4/src/vhdl/axi4_stream_pkg.vhd 0 → 100644
+-- 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/>.
+--
+--------------------------------------------------------------------------------
+
+LIBRARY IEEE, common_lib, dp_lib;
--- a/libraries/base/axi4/tb/vhdl/tb_axi4_stream_dp_bridge.vhd 0 → 100644
+++ b/libraries/base/axi4/tb/vhdl/tb_axi4_stream_dp_bridge.vhd 0 → 100644
+  -- Sync interval
+  proc_dp_sync_interval(clk, sync);
+  
+  -- Input data
+  cnt_val <= in_ready AND cnt_en;
+  
+  proc_dp_cnt_dat(rst, clk, cnt_val, cnt_dat);
+  proc_dp_tx_data(g_dp_rl, rst, clk, cnt_val, cnt_dat, tx_data, tx_val, in_data, in_val);
+  proc_dp_tx_ctrl(c_tx_offset_sync, c_tx_period_sync, in_data, in_val, in_sync);
+  proc_dp_tx_ctrl(c_tx_offset_sop, c_tx_period_sop, in_data, in_val, in_sop);
+  proc_dp_tx_ctrl(c_tx_offset_eop, c_tx_period_eop, in_data, in_val, in_eop);
+  in_empty   <= RESIZE_UVEC(INCR_UVEC(in_data, c_empty_offset)(c_max_empty_w-1 DOWNTO 0), c_dp_stream_empty_w) WHEN in_eop = '1' ELSE (OTHERS => '0');
+  in_channel <= RESIZE_UVEC(INCR_UVEC(in_data, c_channel_offset)(c_max_channel_w-1 DOWNTO 0), c_dp_stream_channel_w);
+  
+  -- Stimuli control
+  proc_dp_count_en(rst, clk, sync, lfsr1, state, verify_done, tb_end, cnt_en);