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URL https://opencores.org/ocsvn/wbddr3/wbddr3/trunk

Subversion Repositories wbddr3

[/] [wbddr3/] - Rev 21

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21 Added formal verification properties

This core now passes formal verification.
dgisselq 1680d 02h /wbddr3/
20 Made the bench/cpp Makefile independent of the Verilator root dgisselq 2719d 16h /wbddr3/
19 Cleaned up the controller, corrected comments, tried to make it more readable. dgisselq 2719d 17h /wbddr3/
18 We now pass all tests again--this time for a 4:1 controller, with a CAS of 5
and a CWL of 5. This is designed for a memory running at 320MHz,
transmitting across the data lines as 640Mbps, and yet running internally at
only 80MHz.
dgisselq 2750d 11h /wbddr3/
17 Here are files from my current attempts to include the DDR3 SDRAM into an
Arty project. Although a part of the Arty project, and not really sub modules
to anything here, they really belong with this project.
dgisselq 2774d 17h /wbddr3/
16 New, modified code, now works in simulation!! dgisselq 2778d 16h /wbddr3/
15 Some simple timing diagrams, illustrating how we can go about this. dgisselq 2781d 22h /wbddr3/
14 Lots of changes. Redesigned the refresh logic, and the activate/precharge
logic. While it's still not working on the hardware, it looks better than
before. (I also caught some bugs in the MRx register settings ...)
dgisselq 2794d 13h /wbddr3/
13 Cleanup, bug fixes--sadly, the code no longer works, so while it's "better"
in that it can build at 200MHz, it no longer works in the Verilator simulation.
dgisselq 2795d 12h /wbddr3/
12 Added the write-read and write-precharge extra delays into both module and
simulation.
dgisselq 2796d 16h /wbddr3/
11 Fixed the bugs Xilinx's tools pointed out. dgisselq 2796d 17h /wbddr3/
10 This might just work ... at least, it passes my testbench. dgisselq 2796d 18h /wbddr3/
9 Making progress: The singular write and pipe read tests work. Random pipe
reads still failing.
dgisselq 2796d 18h /wbddr3/
8 Singular reads and writes now work (in the Verilator simulator)--just not
pipelined reads or writes.
dgisselq 2797d 03h /wbddr3/
7 Make lots of progress. Reset works, and refresh is within a clock measurement
or two of working properly. Singular sequential writes work as well.
dgisselq 2798d 12h /wbddr3/
6 Lots of bug fixes. The controller now proceeds through the proper reset
logic into the first write. This includes activating the needed bank and the
next one, and then issuing the write command. It doesn't complete the write
command yet, but that's the next step.
dgisselq 2799d 12h /wbddr3/
5 Under Verilator/simulation testing, the core now properly brings the device
up from reset. Next step: opening/closing banks.
dgisselq 2799d 19h /wbddr3/
4 Work continues. A preliminary test-bench has been created. The core
has yet to pass through the reset cycle yet, so there's a lot of work
still to be done.
dgisselq 2800d 10h /wbddr3/
3 Fixes some, not all, of the Verilator build/lint errors. dgisselq 2801d 02h /wbddr3/
2 Initial checkin. Pieces are not working yet, but the general approach is
starting to take shape.
dgisselq 2801d 03h /wbddr3/

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