| Rev |
Log message |
Author |
Age |
Path |
| 18 |
Renamed the flash config file |
dgisselq |
2594d 12h |
/ |
| 17 |
Added an option to turn off verbose outputs per tick |
dgisselq |
2594d 12h |
/ |
| 16 |
Added a full blown test bench to the controller
This includes:
- A global make file, and a "make test" which will build the test bench.
- Merging other versions of the QSPI flash driver I had lying around
- Grabbing the best of these, and verifying that they work
- The result is a reduction in overall logic |
dgisselq |
2736d 16h |
/ |
| 15 |
Made the flash simulator's size variable.
Also adjusted the C interface, providing some new functions, so that the flash
simulation can be loaded and queried easier. |
dgisselq |
2757d 23h |
/ |
| 14 |
Updates: little-big endian, various other fixes
1. Made the wbqspiflash.v and llqspi.v files compile with default_nettype none
2. Changed the internal flash representation to big endian. A little-big
endian conversion is now required when writing to the flash from a PC.
3. Simplified the address description via w_wb_addr and w_spif_addr, so that
the core is more flexible when changing sizes.
4. Removed the dependence upon the WB_CYC line ... as part of the WB
simplifications I've been doing.
5. Got XIP working for the EQSPI flash (I guess --- it's been a while since
I made those changes)
6. Adjusted (fixed) sim of read/writes to the volatile config register
(necessary for XIP) |
dgisselq |
2757d 23h |
/ |
| 13 |
Fixed VERILATOR_ROOT static dependency. |
dgisselq |
2960d 13h |
/ |
| 12 |
Adding the sources for the extended Quad SPI flash test bench. |
dgisselq |
3027d 14h |
/ |
| 11 |
This code has been proven, and is currently working within an Arty platform. |
dgisselq |
3027d 14h |
/ |
| 10 |
Switched to Quad Output mode by default. |
dgisselq |
3044d 11h |
/ |
| 9 |
Minor changes to the baseline, FIRST RELEASE OF THE EQSPIFLASH controller!! |
dgisselq |
3044d 13h |
/ |
| 8 |
Minor documentation edits. |
dgisselq |
3275d 11h |
/ |
| 7 |
Added the ability to make the Quad/SPI flash run in read-only mode, in an
effort to reduce it's resource/LUT usage enough to run on a Digilent Cmod-S6. |
dgisselq |
3295d 20h |
/ |
| 6 |
Minor documentation (formatting) changes. |
dgisselq |
3463d 17h |
/ |
| 5 |
Minor changes to the documentation. |
dgisselq |
3470d 21h |
/ |
| 4 |
FIXED: in the previous version, the first read of the device would always fail.
This was due to the fact that the Xilinx loader that read from the device
to load the Xilinx configuration left the Quad SPI flash chip in a high
data rate state. Thus, on reset, the first thing this core does it to
take the device out of the high data rate state.
Also, on a bus action waiting on a write to complete, the timing was
off. This has now been corrected. Reads (in both modes) should now
stall the bus (properly) while a write/erase cycle is ongoing, and
complete when finished.
The bug in high speed writing was traced to a read bug, not a write bug.
High speed (i.e. 4-bit transaction) writing has been re-enabled.
The bug in transitioning from 1-bit mode to 4-bit reads has been fixed.
This was causing the high speed write bug mentioned above.
Read ID was stalling the bus. This was traced to a sign error while
referencing the chip select line, and has been fixed.
The lowerlevel QSPI project was modified to add a holding state. We were
struggling with a bug whereby a late read would hang the device. The upper
level driver would issue it when the lower level driver was busy, and yet
think that it was accomplished. The lower level driver was moving from ready
to idle, so it never saw the read. Now, hold keeps the lower level driver
in the ready state at the end of a read until the bus transaction is complete,
or until it goes on to some other transaction other than reading data.
(This was a big change.)
Finally, unnecessary debugging lines were disabled in the simulator. |
dgisselq |
3475d 18h |
/ |
| 3 |
This quick update fixes some oopses associated with the original release.
Specifically, I made sure the license comments were available in all source
files, made sure all source files mentioned that they were a part of a Quad
SPI flash controller, rather than the Basys-3 development board project they
were originally a part of or the Spartan 3E project before that, I took out
the (undocumented) debug "scaffolding" that was still in the Verilog files,
and I added the C++ source for the bench test/simulator into the project.
Although the full bench test is not complete, it should be sufficient for
anyone who would wish to test this within Verilator.
These changes should not affect any of the functionality of the core. |
dgisselq |
3482d 10h |
/ |
| 2 |
Initial submission. |
dgisselq |
3482d 12h |
/ |
| 1 |
The project and the structure was created |
root |
3482d 15h |
/ |
