URL
https://opencores.org/ocsvn/t400/t400/trunk
Subversion Repositories t400
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- This comparison shows the changes necessary to convert path
/t400/trunk/rtl/tech/cyclone
- from Rev 11 to Rev 176
- ↔ Reverse comparison
Rev 11 → Rev 176
/t400_por-c.vhd
0,0 → 1,20
------------------------------------------------------------------------------- |
-- $Id: t400_por-c.vhd,v 1.2 2006-05-07 01:49:16 arniml Exp $ |
------------------------------------------------------------------------------- |
|
configuration t400_por_rtl_c0 of t400_por is |
|
for cyclone |
end for; |
|
end t400_por_rtl_c0; |
|
|
------------------------------------------------------------------------------- |
-- File History: |
-- |
-- $Log: not supported by cvs2svn $ |
-- Revision 1.1.1.1 2006/05/06 01:56:44 arniml |
-- import from local CVS repository, LOC_CVS_0_1 |
-- |
------------------------------------------------------------------------------- |
/t400_por.vhd
0,0 → 1,122
------------------------------------------------------------------------------- |
-- |
-- T400 Core |
-- |
-- $Id: t400_por.vhd,v 1.1.1.1 2006-05-06 01:56:44 arniml Exp $ |
-- |
-- Wrapper for technology dependent power-on reset circuitry. |
-- |
-- Altera Cyclone flavor. |
-- |
-- Generate a reset upon power-on for specified number of clocks. |
-- |
------------------------------------------------------------------------------- |
-- |
-- Copyright (c) 2006, Arnim Laeuger (arnim.laeuger@gmx.net) |
-- |
-- All rights reserved |
-- |
-- Redistribution and use in source and synthezised forms, with or without |
-- modification, are permitted provided that the following conditions are met: |
-- |
-- Redistributions of source code must retain the above copyright notice, |
-- this list of conditions and the following disclaimer. |
-- |
-- Redistributions in synthesized form must reproduce the above copyright |
-- notice, this list of conditions and the following disclaimer in the |
-- documentation and/or other materials provided with the distribution. |
-- |
-- Neither the name of the author nor the names of other contributors may |
-- be used to endorse or promote products derived from this software without |
-- specific prior written permission. |
-- |
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
-- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE |
-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
-- POSSIBILITY OF SUCH DAMAGE. |
-- |
-- Please report bugs to the author, but before you do so, please |
-- make sure that this is not a derivative work and that |
-- you have the latest version of this file. |
-- |
------------------------------------------------------------------------------- |
|
library ieee; |
use ieee.std_logic_1164.all; |
|
entity t400_por is |
|
generic ( |
delay_g : integer := 4; |
cnt_width_g : integer := 2 |
); |
port ( |
clk_i : in std_logic; |
por_n_o : out std_logic |
); |
|
end t400_por; |
|
|
library ieee; |
use ieee.numeric_std.all; |
|
architecture cyclone of t400_por is |
|
signal por_cnt_q : unsigned(cnt_width_g-1 downto 0) |
-- pragma translate_off |
-- initialize for simulation only |
:= (others => '0') |
-- pragma translate_on |
; |
signal por_n_q : std_logic |
-- pragma translate_off |
-- initialize for simulation only |
:= '0' |
-- pragma translate_on |
; |
|
-- Specify power-up level of por counter and por source. |
-- Refer to "Quartus II Integrated Synthesis", section "Altera Attribute". |
attribute altera_attribute : string; |
attribute altera_attribute of por_cnt_q : signal is "-name POWER_UP_LEVEL LOW"; |
attribute altera_attribute of por_n_q : signal is "-name POWER_UP_LEVEL LOW"; |
|
begin |
|
----------------------------------------------------------------------------- |
-- Process por_cnt |
-- |
-- Purpose: |
-- Generate a power-on reset for the specifiec number of clocks. |
-- |
por_cnt: process (clk_i) |
begin |
if clk_i'event and clk_i = '1' then |
if por_cnt_q = delay_g-1 then |
por_n_q <= '1'; |
else |
por_cnt_q <= por_cnt_q + 1; |
end if; |
end if; |
end process por_cnt; |
-- |
----------------------------------------------------------------------------- |
|
por_n_o <= por_n_q; |
|
end cyclone; |
|
|
------------------------------------------------------------------------------- |
-- File History: |
-- |
-- $Log: not supported by cvs2svn $ |
------------------------------------------------------------------------------- |