Commit Graph

14 Commits (4ec1204767ee87000831e2455145b6406ada6022)

Author SHA1 Message Date
Istvan Csomortani bc692b9bd5 ad_rst: Synthesis attribute 'preserve' is redundant 2018-08-14 17:54:14 +03:00
Istvan Csomortani 1e7f567e16 ad_rst: Initial value of the registers should be its default value
This patch will fix the following critical warning, generated by Quartus:

"Critical Warning (18061): Ignored Power-Up Level option on the following
registers
  Critical Warning (18010): Register ad_rst:i_core_rst_reg|rst_sync will power
  up to High File: ad_rst.v Line: 50"
2018-08-07 13:35:10 +01:00
Istvan Csomortani 472b12feb7 ad_rst: Update the reset synchronizer module
For a proper reset synchronization, the asynchronous reset signal should
be connected to the reset pins of the two synchronizer flop, and the
data input of the first flop should be connected to VCC.

In the first stage  we're synchronizing just the reset de-assertion, avoiding
the scenario when different parts of the design are reseting at different time,
causing unwanted behaviours.

In the second stage we're synchronizing the reset assertion.

The module expects an ACTIVE_HIGH input reset signal, and provides an ACTIVE_LOW
(rstn) and an ACTIVE_HIGH (rst) synchronized reset output signal.
2018-08-06 21:24:41 +03:00
Istvan Csomortani 425e803364 license: Fix a spelling mistake 2018-04-11 15:09:54 +03:00
Istvan Csomortani 84b2ad51e2 license: Add some clarification to the header license 2017-05-31 18:18:56 +03:00
Istvan Csomortani 85ebd3ca01 license: Update license terms in hdl source files
Fix a few gramatical error, fix the path of the top level license
files.
2017-05-29 09:55:41 +03:00
Istvan Csomortani 9055774795 all: Update license for all hdl source files
All the hdl (verilog and vhdl) source files were updated. If a file did not
have any license, it was added into it. Files, which were generated by
a tool (like Matlab) or were took over from other source (like opencores.org),
were unchanged.

New license looks as follows:

Copyright 2014 - 2017 (c) Analog Devices, Inc. All rights reserved.

Each core or library found in this collection may have its own licensing terms.
The user should keep this in in mind while exploring these cores.

Redistribution and use in source and binary forms,
with or without modification of this file, are permitted under the terms of either
 (at the option of the user):

  1. The GNU General Public License version 2 as published by the
     Free Software Foundation, which can be found in the top level directory, or at:
https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html

OR

  2.  An ADI specific BSD license as noted in the top level directory, or on-line at:
https://github.com/analogdevicesinc/hdl/blob/dev/LICENSE
2017-05-17 11:52:08 +03:00
Istvan Csomortani 1c23cf4621 all: Update verilog files to verilog-2001 2017-04-13 11:59:55 +03:00
Adrian Costina 985f2ca020 library: ad_rst, added comment so that the registers are not minimized away 2015-11-24 10:33:38 +02:00
Rejeesh Kutty e4e4700950 dac/adc- make common instances 2015-08-21 14:41:13 -04:00
Rejeesh Kutty 5edf61c40a ad_rst:- allow preset to be synchronized as reset 2015-08-13 13:03:51 -04:00
Lars-Peter Clausen 6862655b0d Add .gitattributes file
Add .gitattributes file which sets up the eol encoding handling. This will
make sure that we get a uniform eol encoding across different operating
systems.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2015-06-26 11:07:10 +02:00
Rejeesh Kutty 74ec396b27 ad_rst: ultrascale -dual stage 2014-11-05 16:47:41 -05:00
Rejeesh Kutty f7c9368abc initial checkin 2014-02-28 14:26:22 -05:00