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
For the AXI stream interface we want to generate TLAST only at the end of
the transfer, rather than at the end of each burst.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
We do not know which 'last' condition to use before hand, but we can pre-compute
the result for both conditions and then use them. This removes the comparison
from the already pretty long combinatorial path.
Also simplify a few expressions.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The pending_burst signal and the expression id != request_id are almost
identical. pending_burst goes high with a delay of one clock cycle, but the
important thing is that it goes low on the same clock cycle as the expression.
By using pending_burst here instead of 'id != request_id' we can reduce the
fanout of the 'id' register and improve the timing of the core.
There were a few place in the core where it assumed a 64-bit wide bus. Make this
configurable using parameters. The patch also adds support for having different
DMA bus widths on the source and destination side.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Right now there is always a period of one clock cycle where we can not transfer
any data when switching between two transfers. This patch modifies the data
mover to allow for zero latency. This fixes problems on the FMCOMMS1 platform
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Istvan Csomortani
Lars-Peter Clausen
Adrian Costina