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[/] [wbddr3/] [trunk/] [rtl/] [wbddrsdram.v] - Rev 19

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19 Cleaned up the controller, corrected comments, tried to make it more readable. dgisselq 2950d 02h /wbddr3/trunk/rtl/wbddrsdram.v
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 2980d 19h /wbddr3/trunk/rtl/wbddrsdram.v
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 3005d 01h /wbddr3/trunk/rtl/wbddrsdram.v
16 New, modified code, now works in simulation!! dgisselq 3009d 00h /wbddr3/trunk/rtl/wbddrsdram.v
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 3024d 21h /wbddr3/trunk/rtl/wbddrsdram.v
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 3025d 20h /wbddr3/trunk/rtl/wbddrsdram.v
12 Added the write-read and write-precharge extra delays into both module and
simulation.
dgisselq 3027d 00h /wbddr3/trunk/rtl/wbddrsdram.v
11 Fixed the bugs Xilinx's tools pointed out. dgisselq 3027d 02h /wbddr3/trunk/rtl/wbddrsdram.v
10 This might just work ... at least, it passes my testbench. dgisselq 3027d 02h /wbddr3/trunk/rtl/wbddrsdram.v
9 Making progress: The singular write and pipe read tests work. Random pipe
reads still failing.
dgisselq 3027d 03h /wbddr3/trunk/rtl/wbddrsdram.v
8 Singular reads and writes now work (in the Verilator simulator)--just not
pipelined reads or writes.
dgisselq 3027d 11h /wbddr3/trunk/rtl/wbddrsdram.v
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 3028d 21h /wbddr3/trunk/rtl/wbddrsdram.v
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 3029d 20h /wbddr3/trunk/rtl/wbddrsdram.v
5 Under Verilator/simulation testing, the core now properly brings the device
up from reset. Next step: opening/closing banks.
dgisselq 3030d 03h /wbddr3/trunk/rtl/wbddrsdram.v
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 3030d 19h /wbddr3/trunk/rtl/wbddrsdram.v
3 Fixes some, not all, of the Verilator build/lint errors. dgisselq 3031d 10h /wbddr3/trunk/rtl/wbddrsdram.v
2 Initial checkin. Pieces are not working yet, but the general approach is
starting to take shape.
dgisselq 3031d 12h /wbddr3/trunk/rtl/wbddrsdram.v

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