APB_MULTI_DIODE.vhd
105 lines
| 3.0 KiB
| text/x-vhdl
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VhdlLexer
martin
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r5 | ------------------------------------------------------------------------------ | |
-- This file is a part of the LPP VHDL IP LIBRARY | |||
-- Copyright (C) 2009 - 2010, 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 2 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 | |||
------------------------------------------------------------------------------- | |||
-- APB_MULTI_DIODE.vhd | |||
library ieee; | |||
use ieee.std_logic_1164.all; | |||
--use ieee.numeric_std.all; | |||
library grlib; | |||
use grlib.amba.all; | |||
use grlib.stdlib.all; | |||
use grlib.devices.all; | |||
library lpp; | |||
use lpp.lpp_amba.all; | |||
entity APB_MULTI_DIODE is | |||
generic ( | |||
pindex : integer := 0; | |||
paddr : integer := 0; | |||
pmask : integer := 16#fff#; | |||
pirq : integer := 0; | |||
abits : integer := 8); | |||
port ( | |||
rst : in std_ulogic; | |||
clk : in std_ulogic; | |||
apbi : in apb_slv_in_type; | |||
apbo : out apb_slv_out_type; | |||
LED : out std_logic_vector(2 downto 0) | |||
); | |||
end; | |||
architecture AR_APB_MULTI_DIODE of APB_MULTI_DIODE is | |||
constant REVISION : integer := 1; | |||
constant pconfig : apb_config_type := ( | |||
0 => ahb_device_reg (VENDOR_LPP, LPP_MULTI_DIODE, 0, REVISION, 0), | |||
1 => apb_iobar(paddr, pmask)); | |||
type LEDregs is record | |||
DATAin : std_logic_vector(31 downto 0); | |||
DATAout : std_logic_vector(31 downto 0); | |||
end record; | |||
signal r : LEDregs; | |||
begin | |||
r.DATAout <= r.DATAin xor X"FFFFFFFF"; | |||
process(rst,clk) | |||
begin | |||
if rst = '0' then | |||
LED <= "000"; | |||
r.DATAin <= (others => '0'); | |||
apbo.prdata <= (others => '0'); | |||
elsif clk'event and clk = '1' then | |||
LED <= r.DATAin(2 downto 0); | |||
--APB Write OP | |||
if (apbi.psel(pindex) and apbi.penable and apbi.pwrite) = '1' then | |||
case apbi.paddr(abits-1 downto 2) is | |||
when "000000" => | |||
r.DATAin <= apbi.pwdata; | |||
when others => | |||
null; | |||
end case; | |||
end if; | |||
--APB READ OP | |||
if (apbi.psel(pindex) and apbi.penable and (not apbi.pwrite)) = '1' then | |||
case apbi.paddr(abits-1 downto 2) is | |||
when "000000" => | |||
apbo.prdata <= r.DATAin; | |||
when others => | |||
apbo.prdata <= r.DATAout; | |||
end case; | |||
end if; | |||
end if; | |||
apbo.pconfig <= pconfig; | |||
end process; | |||
end ar_APB_MULTI_DIODE; |