ddrctrl_controller.vhd

-------------------------------------------------------------------------------
--
-- 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: controller for ddrctrl, decides when to write when to read or when to stop writing or reading.
--
-- Description:
--
-- Remark:
--  Use VHDL coding template from:
--  https://support.astron.nl/confluence/display/SBe/VHDL+design+patterns+for+RTL+coding
--  

LIBRARY IEEE, dp_lib, common_lib, tech_ddr_lib;
USE IEEE.std_logic_1164.ALL;
USE IEEE.numeric_std.ALL;
USE dp_lib.dp_stream_pkg.ALL;
USE common_lib.common_mem_pkg.ALL;
USE common_lib.common_pkg.ALL;
USE tech_ddr_lib.tech_ddr_pkg.ALL;


ENTITY ddrctrl_controller IS
  GENERIC (
    g_tech_ddr                : t_c_tech_ddr;
    g_stop_percentage         : NATURAL     := 50;
    g_nof_streams             : NATURAL;    -- 12
    g_out_data_w              : NATURAL;    -- 14
    g_wr_data_w               : NATURAL;    -- 168
    g_rd_fifo_depth           : NATURAL;    -- 256
    g_rd_data_w               : NATURAL;    -- 256
    g_block_size              : NATURAL;    -- 1024
    g_wr_fifo_uw_w            : NATURAL;    -- 8
    g_rd_fifo_uw_w            : NATURAL;    -- 8
    g_max_adr                 : NATURAL;    -- 16128
    g_burstsize               : NATURAL;    -- 64
    g_last_burstsize          : NATURAL;    -- 18
    g_adr_per_b               : NATURAL;    -- 299
    g_bim                     : NATURAL     -- 54
  );
  PORT (
    clk                       : IN  STD_LOGIC;
    rst                       : IN  STD_LOGIC;

    -- ddrctrl_input
    inp_of                    : IN  NATURAL;
    inp_sosi                  : IN  t_dp_sosi;
    inp_adr                   : IN  NATURAL;
    inp_bsn_adr               : IN  NATURAL;
    inp_data_stopped          : IN  STD_LOGIC;
    rst_ddrctrl_input_ac      : OUT STD_LOGIC;

    -- io_ddr
    dvr_mosi                  : OUT t_mem_ctlr_mosi;