Libgpiod V2: New Major Release with a Ton of New Features
Talkat Embedded Linux Conference @ Open Source Summit North America 2022 · on Friday, 2022-06-24· at 14:50· Room 203/204 (Level 2), JW Marriott Austin, 110 E 2nd Street Austin, TX 78701·
summary
Libgpiod v2 reworks the C API into opaque objects, implements the new kernel character-device v2 features (per-line sequence numbers, configurable debounce and timestamps), and provides configuration overrides so a single request can set defaults and per-line exceptions. It adds a line info watch for live state-change events, an edge event buffer to avoid reallocations for high-rate IRQs, a gpiosim test backend, revamped Python bindings, Rust bindings in progress, and new gpio-watch and interactive gpio-set tools. Release is staged on the next/2.0 branch.
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chapters (14)
- 0:00Introduction to libgpiod
- 1:02Evolution of GPIO interface
- 2:27The architecture of libgpiod
- 3:28Lessons learned from v1
- 5:19The new kernel interface v2
- 8:29Core data model improvements
- 12:21Requesting lines in v2
- 13:46Configuration and event handling
- 15:12Monitoring and watching lines
- 17:19Efficient event management
- 20:11Advanced feature configurations
- 23:08Testing with gpiosim
- 25:08Summary and roadmap
- 28:20Q&A session
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