-------------------------------------------------------------------------------
--
-- Copyright 2022
-- ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>
-- P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-------------------------------------------------------------------------------
-- Author: Job van Wee
-- Purpose: Folding a stream of data into a mm data configuration so it can be
-- stored in a DDR RAM-stick.
--
-- Description:
-- First the data from the sosi array gets collected into one data vector.
-- After that this data vector gets resized to the right size data vector in
-- order to make it storable in a DDR RAM-stick.
-- After that a address gets assigned to the data so the data can be found back.
--
-- Remark:
-- Use VHDL coding template from:
-- https://support.astron.nl/confluence/display/SBe/VHDL+design+patterns+for+RTL+coding
-- The maximum value of the address is determend by g_tech_ddr.
LIBRARY IEEE, technology_lib, tech_ddr_lib, common_lib, dp_lib, io_ddr_lib;
USE IEEE.std_logic_1164.ALL;
USE IEEE.numeric_std.ALL;
USE technology_lib.technology_pkg.ALL;
USE technology_lib.technology_select_pkg.ALL;
USE tech_ddr_lib.tech_ddr_pkg.ALL;
USE common_lib.common_pkg.ALL;
USE common_lib.common_mem_pkg.ALL;
USE dp_lib.dp_stream_pkg.ALL;
USE io_ddr_lib.ALL;
ENTITY ddrctrl IS
GENERIC (
g_tech_ddr : t_c_tech_ddr; -- type of memory
g_sim_model : BOOLEAN := TRUE; -- determens if this is a simulation
g_technology : NATURAL := c_tech_select_default;
g_nof_streams : NATURAL := 12; -- number of input streams
g_data_w : NATURAL := 14; -- data with of input data vectors
g_stop_percentage : NATURAL := 50
);
PORT (
clk : IN STD_LOGIC := '0';
rst : IN STD_LOGIC;
mm_clk : IN STD_LOGIC := '0';
mm_rst : IN STD_LOGIC := '0';
in_sosi_arr : IN t_dp_sosi_arr; -- input data
wr_not_rd : IN STD_LOGIC := '0';
stop_in : IN STD_LOGIC := '0';
term_ctrl_out : OUT t_tech_ddr3_phy_terminationcontrol;
term_ctrl_in : IN t_tech_ddr3_phy_terminationcontrol := c_tech_ddr3_phy_terminationcontrol_rst;
-- DDR3 PHY external interface
phy3_in : IN t_tech_ddr3_phy_in := c_tech_ddr3_phy_in_x;
phy3_io : INOUT t_tech_ddr3_phy_io;
phy3_ou : OUT t_tech_ddr3_phy_ou;
-- DDR4 PHY external interface
phy4_in : IN t_tech_ddr4_phy_in := c_tech_ddr4_phy_in_x;
phy4_io : INOUT t_tech_ddr4_phy_io;
phy4_ou : OUT t_tech_ddr4_phy_ou
);
END ddrctrl;
ARCHITECTURE str OF ddrctrl IS
-- constant for readability
CONSTANT c_io_ddr_data_w : NATURAL := func_tech_ddr_ctlr_data_w( g_tech_ddr );
CONSTANT c_wr_fifo_depth : NATURAL := 256; -- defined at DDR side of the FIFO, >=16 and independent of wr burst size, default >= 256 because 32b*256 fits in 1 M9K so c_ctlr_data_w=256b will require 8 M9K
CONSTANT c_rd_fifo_depth : NATURAL := 256; -- defined at DDR side of the FIFO, >=16 AND > max number of rd burst sizes (so > c_rd_fifo_af_margin), default >= 256 because 32b*256 fits in 1 M9K so c_ctlr_data_w=256b will require 8 M9K
-- signals for connecting the components
SIGNAL ctrl_clk : STD_LOGIC;
SIGNAL ctrl_rst : STD_LOGIC;
SIGNAL out_of : NATURAL := 0;
SIGNAL out_sosi : t_dp_sosi := c_dp_sosi_init;
SIGNAL out_adr : NATURAL := 0;
SIGNAL dvr_mosi : t_mem_ctlr_mosi := c_mem_ctlr_mosi_rst;
SIGNAL wr_sosi : t_dp_sosi := c_dp_sosi_init;
SIGNAL rd_siso : t_dp_siso := c_dp_siso_rst;
BEGIN
-- input to io_ddr
u_ddrctrl_input : ENTITY work.ddrctrl_input
GENERIC MAP(
g_tech_ddr => g_tech_ddr,
g_sim_model => g_sim_model,
g_nof_streams => g_nof_streams,
g_data_w => g_data_w
)
PORT MAP(
clk => clk,
rst => rst,
in_sosi_arr => in_sosi_arr,
out_of => out_of,
out_sosi => out_sosi,
out_adr => out_adr
);
-- functions as a fifo buffer for input data into the sdram stick. also manages input to sdram stick.
u_io_ddr : ENTITY io_ddr_lib.io_ddr
GENERIC MAP(
g_sim_model => g_sim_model,
g_technology => g_technology,
g_tech_ddr => g_tech_ddr,
g_cross_domain_dvr_ctlr => FALSE,
g_wr_data_w => c_io_ddr_data_w,
g_wr_fifo_depth => c_wr_fifo_depth,
g_rd_fifo_depth => c_rd_fifo_depth,
g_rd_data_w => c_io_ddr_data_w,
g_wr_flush_mode => "VAL",
g_wr_flush_use_channel => FALSE,
g_wr_flush_start_channel => 0,
g_wr_flush_nof_channels => 1
)
PORT MAP(
-- DDR reference clock
ctlr_ref_clk => clk,
ctlr_ref_rst => rst,
-- DDR controller clock domain
ctlr_clk_out => ctrl_clk,
ctlr_rst_out => ctrl_rst,
ctlr_clk_in => ctrl_clk,
ctlr_rst_in => ctrl_rst,
-- MM clock + reset
mm_rst => mm_rst,
mm_clk => mm_clk,
-- MM interface
reg_io_ddr_mosi => open,
reg_io_ddr_miso => open,
-- Driver clock domain
dvr_clk => clk,
dvr_rst => rst,
dvr_miso => open,
dvr_mosi => dvr_mosi,
-- Write FIFO clock domain
wr_clk => clk,
wr_rst => rst,
wr_fifo_usedw => open,
wr_sosi => wr_sosi,
wr_siso => open,
-- Read FIFO clock domain
rd_clk => clk,
rd_rst => rst,
rd_fifo_usedw => open,
rd_sosi => open,
rd_siso => rd_siso,
term_ctrl_out => term_ctrl_out,
term_ctrl_in => term_ctrl_in,
-- DDR3 PHY external interface
phy3_in => phy3_in,
phy3_io => phy3_io,
phy3_ou => phy3_ou,
-- DDR4 PHY external interface
phy4_in => phy4_in,
phy4_io => phy4_io,
phy4_ou => phy4_ou
);
-- controller of ddrctrl
u_ddrctrl_controller : ENTITY work.ddrctrl_controller
GENERIC MAP(
g_tech_ddr => g_tech_ddr,
g_stop_percentage => g_stop_percentage
)
PORT MAP(
clk => clk,
rst => rst,
inp_of => out_of,
inp_sosi => out_sosi,
inp_adr => out_adr,
dvr_mosi => dvr_mosi,
wr_sosi => wr_sosi,
rd_siso => rd_siso,
stop_in => stop_in
);
END str;