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[/] [sdram_controller/] [trunk/] - Rev 22

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22 Testbench was "broken" when I fixed controller for my SoC.
This "fixes" the testbench so it works again, so that the
testbench and my SoC both work.		 lynn0p 5420d 16h /sdram_controller/trunk/
21 1. Updated testbench to reflect lack of en signal
2. Deleted tarball and replaced it with a project file
and user constraints file		 lynn0p 5420d 17h /sdram_controller/trunk/
20 Got rid of the en signal, minor changes to eliminate synthesizer warnings. lynn0p 5422d 12h /sdram_controller/trunk/
19 Fix for the transparent latch warning. Z80 call stack pointer test code
still works.		 lynn0p 5422d 13h /sdram_controller/trunk/
18 Forgot to update the comments lynn0p 5423d 16h /sdram_controller/trunk/
17 When I moved the z80 callstack pointer into SDRAM from onchip SRAM,
very hilarious things started to happen. This removes the hilarity and
restores the previous somber mood. Depending on your own design you
may or may not want to update to this revision		 lynn0p 5423d 16h /sdram_controller/trunk/
16 Removed a redundant cap_en lynn0p 5425d 22h /sdram_controller/trunk/
15 - Adding a convenience project for building the testbench.
- Must have ISE 11.1 or higher and project is targeted at device type
xc3s500e-4fg320
- Pinouts may be incorrect for other board types. It is your
responsibility to check. Incorrect pinouts can lead to device damage.		 lynn0p 5426d 15h /sdram_controller/trunk/
14 Changed the clock period in the DCM generic to match 50mhz lynn0p 5426d 18h /sdram_controller/trunk/
13 Updated the top level testbench to reflect the fact that you need an
external DCM to run the controller with now.		 lynn0p 5426d 19h /sdram_controller/trunk/
12 1. rolled write recover clocks back to previous value and edited comments
2. increased 200us wait time to 300us in the init module		 lynn0p 5435d 22h /sdram_controller/trunk/
11 consolidated capture into one process and added comments lynn0p 5436d 18h /sdram_controller/trunk/
10 Fixes to more glitches uncovered during testing with my T80 SoC. Some
ops were getting dropped on the floor when the controller needed to do
an auto refresh.		 lynn0p 5436d 22h /sdram_controller/trunk/
9 Got rid of some redundant busy_n <= '0' statements lynn0p 5438d 10h /sdram_controller/trunk/
8 Changes made to integrate and test with my homebrew SoC design.

1. One DCM has been removed. Now requires a 100mhz clock fed in. Only
consumes one DCM, if you can find a 100mhz clock somewhere.
2. Small timing modifications to fix memory glitches between controller
and the t80 soft cpu I'm using.		 lynn0p 5438d 10h /sdram_controller/trunk/
7 Reformatted the comments so they fit in 80 columns lynn0p 5446d 15h /sdram_controller/trunk/
6 changes to reduce synthesizer warnings, removed unused signals, etc. lynn0p 5446d 20h /sdram_controller/trunk/
5 added header file for ddr.v lynn0p 5447d 15h /sdram_controller/trunk/
4 added testbench files to trunk lynn0p 5447d 15h /sdram_controller/trunk/
3 adding LGPLv3 license file lynn0p 5447d 16h /sdram_controller/trunk/

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