Move the CDC helper modules to a dedicated helper modules. This makes it
possible to reference them without having to use file paths that go outside
of the referencing project's directory.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
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
There are devices which have a asynchronous data ready signal. (asynchronous
with the spi clock) The CDC stages can be enabled by setting up
the ASYNC_TRIG parameter.
By changing the parameter called SDI_DATA_WIDTH the spi framework can support multiple SDI lines.
The supported number of SDI lines are: 1, 2, 3 and 4.
SPI Engine is a highly flexible and powerful SPI controller framework. It
consist out of multiple sub-modules which communicate over well defined
interfaces. This allows a high degree of flexibility and re-usability while
at the same time staying highly customizable and easily extensible.
Currently included are four components:
* SPI Engine execution module: The excution module is responsible for
handling the low-level physical interface SPI logic.
* SPI Engine AXI interface module: The AXI interface module allows
memory mapped acccess to a SPI bus control stream and can be used to
implement a software driver that controls the SPI bus.
* SPI Engine offload module: The offload module allows to store a
predefined SPI Engine command and data stream which will be send out
when a external trigger signal is asserted.
* SPI Engine interconnect module: The interconnect module allows to
combine multiple control streams into a single stream giving multiple
control modules access to a execution module.
For more information see: http://wiki.analog.com/resources/fpga/peripherals/spi_engine
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Istvan Csomortani
Lars-Peter Clausen
Adrian Costina
Rejeesh Kutty