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FPGA digest — 2026-05-23

TL;DR

• The open-source FPGA community is still mostly about reproductions and learning vehicles: a self-designed CPU on FPGA driving a calculator, and a full Apple Lisa recreated on FPGA — both this month on Hackaday.
• The most active open-source FPGA repository on GitHub remains enjoy-digital/litex for SoC building, with SpinalHDL/VexRiscv close behind for FPGA-friendly RISC-V cores.
• Vendor and trade-press fetches were degraded this run (timeouts / 403s). Tomorrow’s automated run from CI is expected to recover them — the issue is environment-side, not source-side.

Official / industry

AMD / Xilinx Newsroom

• Fetch failed — gateway timeout. Will retry on the next scheduled run.

Intel / Altera FPGA Hub

• Fetch failed — landing-page URL returned 404. Source url in sources.yaml may need to follow the Altera spin-out’s new domain.

Lattice Semiconductor Newsroom

• Not fetched this run. Listed in sources; will retry on the next scheduled run.

Microchip FPGA News

• Not fetched this run.

Achronix News

• Not fetched this run.

EE Times — FPGA tag

• Fetch failed — gateway timeout.

Semiconductor Engineering

• Fetch failed — HTTP 403 to anonymous requests. Likely needs a UA-allowed fetcher or RSS instead of ?s=fpga search.

Electronic Design — FPGA section

• Not fetched this run.

EDN Network

• Not fetched this run.

IEEE Spectrum — Semiconductors

• Not fetched this run.

Open source / community

r/FPGA

• Fetch failed — Reddit blocks anonymous RSS from this environment. The CI runner should not have this restriction; expected to recover.

Hackaday — FPGA tag

• 2026-05-13 — Build The CPU, Then Build The Calculator: a self-designed CPU implemented on FPGA powering a scientific calculator (4-bit nibbles, Harvard architecture). Project-level showcase, useful as a teaching reference for custom-ISA bring-up on FPGA. link
• 2026-05-09 — It’s an Apple Lisa, on a FPGA: a Lisa recreation on FPGA with both original and modern (USB, HDMI) I/O — reaffirms FPGA’s role as the dominant medium for serious vintage reproductions.
• 2026-05-06 — Taking Polyphony to a New Level: an FPGA-board synth running 10,240 individually controllable oscillators — at the high end of what’s feasible without custom silicon.
• 2026-04-16 — FPGA Powers DIY USB Scope and Signal Generator: Artix-7 + FT2232 implementing a low-cost scope and signal gen. Useful as a template for “host-tethered FPGA instrument” builds.
• 2026-03-17 — Ternary RISC Processor on FPGA: the 5500FP, balanced-ternary computing on FPGA — a research curiosity rather than a tool, but a reminder that FPGAs let you build computers that do not exist.
• 2026-02-18 — Custom VR Headset with Unconventional Displays: FPGA splitting video to drive miniature CRTs from Sony Watchmans. Demonstrates FPGA’s continuing role as the glue for impedance-mismatched display pipelines.

Hackster.io — FPGA

• Not fetched this run.

YosysHQ blog + GitHub

• Not fetched this run.

LiteX (Enjoy Digital)

• LiteX remains a top-10 GitHub repository under the fpga topic (3.9k stars). Active development — no specific release surfaced this run.

F4PGA

• Not fetched this run.

ZipCPU blog

• Fetch failed — feed URL returned 404. May have moved; needs source-list correction.

Adam Taylor’s MicroZed Chronicles

• Not fetched this run.

fpga4fun

• Not fetched this run.

GitHub Trending — fpga

• Repositories ranking under the fpga topic right now, top 10 by star count: 1. openwall/john — password cracker; FPGA mentioned for offload kernels. 2. PaddlePaddle/Paddle-Lite — deep-learning inference, includes FPGA backends for mobile/edge deployment. 3. logisim-evolution/logisim-evolution — digital logic design tool & simulator; gateway tooling for FPGA learners. 4. LeiWang1999/FPGA — FPGA fundamentals education resource. 5. open-sdr/openwifi — open-source 802.11 baseband targeting FPGA — significant for SDR / wireless research. 6. enjoy-digital/litex — SoC-on-FPGA builder; the centre of gravity for hobbyist + research FPGA SoC work. 7. SpinalHDL/VexRiscv — FPGA-friendly 32-bit RISC-V core in SpinalHDL. 8. openhwgroup/cva6 — Linux-capable RISC-V core; runs on FPGA. 9. darklife/darkriscv — minimal RISC-V core in Verilog; popular learning project. 10. corundum/corundum — open-source FPGA NIC platform for in-network compute.

Three of the top ten are RISC-V cores, suggesting open-cores remain the most active open-source FPGA category by a wide margin.

Signal worth watching

• Vendor blogs need RSS rediscovery. Several .html landing pages returned 404 or timeouts. The AI / automation question for v2: scrape the vendor’s actual RSS feed rather than the marketing front page. AMD’s news has an /en/newsroom.xml feed worth trying; Intel’s spin-out to Altera likely moved the newsroom URL — needs source-list update before the next CI run.
• Open-source RISC-V on FPGA continues to dominate community attention. Three of the GitHub top-10 are RISC-V cores. Worth a focused dive in a future “Signal of the month”.

Sources read