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------------------------------------------------------------------------------
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-- This file is a part of the LPP VHDL IP LIBRARY
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-- Copyright (C) 2016, Laboratory of Plasmas Physic - CNRS
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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------------------------------------------------------------------------------
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-- Author : Alexis Jeandet
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-- Mail : alexis.jeandet@lpp.polytechnique.fr
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------------------------------------------------------------------------------
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library ieee;
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use ieee.std_logic_1164.all;
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--use ieee.numeric_std.all;
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library grlib;
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use grlib.amba.all;
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use grlib.stdlib.all;
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use grlib.devices.all;
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library lpp;
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use lpp.apb_devices_list.all;
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use lpp.lpp_amba.all;
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use lpp.general_purpose.TimeGenAdvancedTrigger;
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entity APB_ADVANCED_TRIGGER is
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generic (
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pindex : integer := 0;
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paddr : integer := 0;
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pmask : integer := 16#fff#;
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pirq : integer := 0);
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port (
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rstn : in std_ulogic;
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clk : in std_ulogic;
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apbi : in apb_slv_in_type;
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apbo : out apb_slv_out_type;
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SPW_Tickout : IN STD_LOGIC;
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CoarseTime : IN STD_LOGIC_VECTOR(31 DOWNTO 0);
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FineTime : IN STD_LOGIC_VECTOR(15 DOWNTO 0);
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Trigger : OUT STD_LOGIC
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);
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end;
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architecture beh of APB_ADVANCED_TRIGGER is
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constant REVISION : integer := 1;
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constant pconfig : apb_config_type := (
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0 => ahb_device_reg (VENDOR_LPP, LPP_APB_ADVANCED_TRIGGER, 0, REVISION, 0),
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1 => apb_iobar(paddr, pmask));
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type adv_trig_type is record
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TrigPeriod : STD_LOGIC_VECTOR(3 DOWNTO 0); -- In seconds 0 to 15
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TrigShift : STD_LOGIC_VECTOR(15 DOWNTO 0); -- In FineTime steps
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Restart : STD_LOGIC;
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StartDate : STD_LOGIC_VECTOR(31 DOWNTO 0); -- Date in seconds since epoch
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BypassTickout : STD_LOGIC; -- if set then Trigger output is driven by SPW tickout
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end record;
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type adv_trig_regs is record
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CFG : STD_LOGIC_VECTOR(31 DOWNTO 0);
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Restart : STD_LOGIC_VECTOR(31 DOWNTO 0);
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StartDate : STD_LOGIC_VECTOR(31 DOWNTO 0);
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end record;
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signal r : adv_trig_regs;
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signal adv_trig : adv_trig_type;
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signal Rdata : std_logic_vector(31 downto 0);
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begin
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adv_trig0: TimeGenAdvancedTrigger
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PORT MAP(
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clk => clk,
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rstn => rstn,
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SPW_Tickout => SPW_Tickout,
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CoarseTime => CoarseTime,
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FineTime => FineTime,
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TrigPeriod => adv_trig.TrigPeriod,
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TrigShift => adv_trig.TrigShift,
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Restart => adv_trig.Restart,
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StartDate => adv_trig.StartDate,
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BypassTickout => adv_trig.BypassTickout,
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Trigger => Trigger
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);
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adv_trig.BypassTickout <= r.CFG(0);
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adv_trig.TrigPeriod <= r.CFG(7 downto 4);
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adv_trig.TrigShift <= r.CFG(31 downto 16);
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adv_trig.Restart <= r.Restart(0);
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adv_trig.StartDate <= r.StartDate;
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process(rstn,clk)
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begin
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if rstn = '0' then
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r.CFG <= (others=>'0');
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r.Restart <= (others=>'0');
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r.StartDate <= (others=>'0');
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elsif clk'event and clk = '1' then
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--APB Write OP
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if (apbi.psel(pindex) and apbi.penable and apbi.pwrite) = '1' then
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case apbi.paddr(3 downto 2) is
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when "00" =>
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r.CFG <= apbi.pwdata;
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when "01" =>
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r.Restart <= apbi.pwdata;
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when "10" =>
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r.StartDate <= apbi.pwdata;
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when others =>
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null;
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end case;
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end if;
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--APB READ OP
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if (apbi.psel(pindex) and (not apbi.pwrite)) = '1' then
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case apbi.paddr(3 downto 2) is
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when "00" =>
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Rdata <= r.CFG;
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when "01" =>
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Rdata <= r.Restart;
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when "10" =>
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Rdata <= r.StartDate;
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when others =>
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Rdata <= r.Restart;
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end case;
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end if;
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end if;
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apbo.pconfig <= pconfig;
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end process;
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apbo.prdata <= Rdata when apbi.penable = '1';
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end beh;
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