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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) 2009 - 2010, 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 2 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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-- APB_SIMPLE_DIODE.vhd
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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.lpp_amba.all;
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entity APB_SIMPLE_DIODE 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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abits : integer := 8);
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port (
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rst : 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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LED : out std_ulogic
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);
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end;
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architecture AR_APB_SIMPLE_DIODE of APB_SIMPLE_DIODE 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_SIMPLE_DIODE, 0, REVISION, 0),
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1 => apb_iobar(paddr, pmask));
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type LEDregs is record
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DATAin : std_logic_vector(31 downto 0);
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DATAout : std_logic_vector(31 downto 0);
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end record;
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signal r : LEDregs;
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begin
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r.DATAout <= r.DATAin xor X"FFFFFFFF";
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process(rst,clk)
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begin
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if rst = '0' then
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LED <= '0';
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r.DATAin <= (others => '0');
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apbo.prdata <= (others => '0');
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elsif clk'event and clk = '1' then
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LED <= r.DATAin(0);
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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(abits-1 downto 2) is
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when "000000" =>
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r.DATAin <= 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 apbi.penable and (not apbi.pwrite)) = '1' then
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case apbi.paddr(abits-1 downto 2) is
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when "000000" =>
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apbo.prdata <= r.DATAin;
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when others =>
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apbo.prdata <= r.DATAout;
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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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-- pragma translate_off
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-- bootmsg : report_version
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-- generic map ("apbuart" & tost(pindex) &
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-- ": Generic UART rev " & tost(REVISION) & ", fifo " & tost(fifosize) &
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-- ", irq " & tost(pirq));
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-- pragma translate_on
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end ar_APB_SIMPLE_DIODE;
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