A modern logic analyzer. Electron + React UI, Rust core.
Saleae's Logic 2 sets the bar for logic analyzer software: fast, polished, a pleasure to use. It only works with Saleae hardware.
PulseView is the open alternative, and the sigrok project behind it is a huge achievement. It supports a vast range of hardware, and Edgewise builds on its work, including the open fx2lafw firmware. But the interface shows its age, and it can struggle with large captures.
Edgewise aims for both: a polished app that gives a $5 FX2 board from AliExpress the same experience as a top-of-the-range analyzer. It has a Rust core for large captures and native drivers, so it needs no vendor software. Today it supports FX2-based boards and a built-in demo device, with more hardware planned.
npm install
npm run dev # builds the Rust addon, then launches the app
npm test # Rust unit testsTo try a pull request without disturbing your checkout, npm run pr 41 checks it out in a reusable worktree next to this one (../edgewise-review), lists what its description says still needs checking by hand, and launches it. npm run pr clean removes the worktree.
node scripts/ui.mjs [check.mjs] builds and launches the app under Playwright, runs each check script against it, and saves screenshots and GIFs to ui-checks/. CI and the agent workflows use it to see the app running; the script header gives the API. scripts/pr-media.sh <PR> <files> publishes those files to the pr-media branch and prints Markdown to embed them in the PR.
Needs Rust (rustup) and Node 20+.
crates/logic-core: sample storage with per-chunk summary trees, edge search, decoders (UART, I²C, SPI), software trigger,.srload/save, VCD export, devices (demo generator, native fx2lafw USB driver vianusb)crates/logic-node: N-API binding, copied tonative/logic.nodebyscripts/build-native.mjssrc/main: Electron main process; owns the engine, exposes a whitelisted IPC surfacesrc/renderer: React UI; canvas waveform fed by per-pixel (first, toggle-mask) data from Rust
FX2-based boards running sigrok's fx2lafw firmware. If the board has no firmware yet, Edgewise uploads it. The installers ship the firmware in a bundled firmware folder, with its license (GPL-2.0-or-later) and source tarball, so a bare board works with no setup. Edgewise looks for the .fw files first in the app's firmware folder (File → Open Firmware Folder), then in the bundled copy, installed PulseView bundles and the usual sigrok-firmware locations, so a file in the app's firmware folder takes precedence.
With sigrok-cli installed, Edgewise also lists the logic analyzers it finds through sigrok's own drivers (DSLogic, Kingst, OLS, Sipeed SLogic and others) and captures through sigrok-cli. An FX2 board is offered both ways, "via sigrok-cli" in the picker, so the two paths can be compared.
MIT