Piotr Binkowski

[WIP] tools: add scripts for automating tests of old tool revisions

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This PR adds scripts that automate process of testing old tool revisions with current test suite To use it, just run `tools/compare.sh ` where `n` is number of versions to...

[s80x86](https://github.com/jamieiles/80x86) is a 80186 compatible CPU written in SystemVerilog. At some point this can be added as a test case.

This PR adds CI run that builds `proj_template_v` for Arty board using SymbiFlow toolchain. After a successful build outputs are saved as artifacts.

cfu: generate rsp_valid without using cmd_valid

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This PR removes combinational path from `cmd_valid` to `rsp_valid` which slightly improves fMax (1-2MHz in recent tests) and FWIW doesn't impact model evaluation time.

openocd fails to flash image on numato opsis

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`openocd` that comes with buildenv as a conda package fails to flash image on the FPGA flash, it looks like it has some kind of communication issue because the flash...

Current yosys version fails on some iCE40 designs

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While working on #244 I noticed that some designs result in yosys failing on `yosys-abc` call: ``` 4.46.18. Finished OPT passes. (There is nothing left to do.) 4.47. Executing TECHMAP...

[WIP] add HDMI2ETH support

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Depends on #238 This PR aims to add support for HDMI2ETH target for the following boards: - [ ] NeTV2 - [ ] Nexys Video - [ ] Numato Opsis...

[WIP] use FX2Crossbar for communication with FX2 chip in HDMI2USB designs

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This PR modifies the HDMI2USB target of Opsis and Atlys boards to utilize [FX2Crossbar](https://github.com/GlasgowEmbedded/glasgow/commits/master/software/glasgow/gateware/fx2_crossbar.py). Using this crossbar it is possible to access 4 FX2 USB endpoints using LiteX Streams. Current...

I've built an image for Numato Opsis using latest litex-buildenv using the following configuration `PLATFORM=opsis TARGET=video CPU=vexriscv` and LiteX BIOS `memtest` fails on the board. The board itself works correctly...