TimeGenAdvancedTrigger.vhd
128 lines
| 3.5 KiB
| text/x-vhdl
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VhdlLexer
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r653 | -- TimeGenAdvancedTrigger.vhd | ||
------------------------------------------------------------------------------ | ||||
-- This file is a part of the LPP VHDL IP LIBRARY | ||||
-- Copyright (C) 2009 - 2016, Laboratory of Plasmas Physic - CNRS | ||||
-- | ||||
-- 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, write to the Free Software | ||||
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||||
------------------------------------------------------------------------------- | ||||
-- Author : Alexis Jeandet | ||||
-- Mail : alexis.jeandet@lpp.polytechnique.fr | ||||
------------------------------------------------------------------------------- | ||||
LIBRARY IEEE; | ||||
USE IEEE.numeric_std.ALL; | ||||
USE IEEE.std_logic_1164.ALL; | ||||
ENTITY TimeGenAdvancedTrigger IS | ||||
PORT( | ||||
clk : IN STD_LOGIC; | ||||
rstn : IN STD_LOGIC; | ||||
SPW_Tickout : IN STD_LOGIC; | ||||
CoarseTime : IN STD_LOGIC_VECTOR(31 DOWNTO 0); | ||||
FineTime : IN STD_LOGIC_VECTOR(15 DOWNTO 0); | ||||
TrigPeriod : IN STD_LOGIC_VECTOR(3 DOWNTO 0); -- In seconds 0 to 15 | ||||
TrigShift : IN STD_LOGIC_VECTOR(15 DOWNTO 0); -- In FineTime steps | ||||
Restart : IN STD_LOGIC; | ||||
StartDate : IN STD_LOGIC_VECTOR(31 DOWNTO 0); -- Date in seconds since epoch | ||||
BypassTickout : IN STD_LOGIC; -- if set then Trigger output is driven by SPW tickout | ||||
-- else Trigger output is driven by advanced trig | ||||
Trigger : OUT STD_LOGIC | ||||
); | ||||
END TimeGenAdvancedTrigger; | ||||
ARCHITECTURE beh OF TimeGenAdvancedTrigger IS | ||||
SIGNAL AdvancedTrigger : STD_LOGIC:='0'; | ||||
SIGNAL AdvancedTrigger_l0 : STD_LOGIC:='0'; | ||||
SIGNAL AdvancedTrigger_l1 : STD_LOGIC:='0'; | ||||
SIGNAL started : STD_LOGIC:='0'; | ||||
SIGNAL periodCntr : STD_LOGIC_VECTOR(3 DOWNTO 0):=(OTHERS=>'0'); | ||||
SIGNAL coarseTime0 : STD_LOGIC:='0'; | ||||
BEGIN | ||||
Trigger <= SPW_Tickout WHEN BypassTickout = '1' ELSE AdvancedTrigger; | ||||
AdvancedTrigger <= AdvancedTrigger_l0 AND AdvancedTrigger_l1; | ||||
PROCESS(clk,rstn) | ||||
BEGIN | ||||
IF rstn = '0' THEN | ||||
started <= '0'; | ||||
AdvancedTrigger_l0 <='0'; | ||||
AdvancedTrigger_l1 <='0'; | ||||
coarseTime0 <= '0'; | ||||
periodCntr <= (OTHERS => '0'); | ||||
ELSIF clk'event AND clk = '1' THEN | ||||
coarseTime0 <= CoarseTime(0); | ||||
-- Detection of start date and handling of Restart | ||||
IF Restart = '1' THEN | ||||
started <= '0'; | ||||
ELSIF StartDate = CoarseTime THEN | ||||
started <= '1'; | ||||
END IF; | ||||
-- Fine time based comparator for phase shift | ||||
IF TrigShift = FineTime THEN | ||||
AdvancedTrigger_l0 <='1'; | ||||
ELSE | ||||
AdvancedTrigger_l0 <='0'; | ||||
END IF; | ||||
-- Second filter, generates a pulse for each N seconds since StartDate | ||||
IF started = '1' THEN | ||||
IF periodCntr = "0000" THEN | ||||
AdvancedTrigger_l1 <='1'; | ||||
periodCntr <= TrigPeriod; | ||||
ELSIF CoarseTime(0) /= coarseTime0 THEN | ||||
periodCntr <= STD_LOGIC_VECTOR(SIGNED(periodCntr) - 1); | ||||
AdvancedTrigger_l1 <='0'; | ||||
END IF; | ||||
ELSE | ||||
periodCntr <= (OTHERS => '0'); | ||||
AdvancedTrigger_l1 <='0'; | ||||
END IF; | ||||
END IF; | ||||
END PROCESS; | ||||
END beh; | ||||