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An Introduction to chardev GPIO and Libgpiod on the Raspberry PI

October 16, 2018 Craig Peacock 0

Linux 4.8 introduced a new GPIO user space subsystem for accessing GPIO. This tutorial provides an introduction to the new Character Device GPIO and explores how to control GPIO from the command line. sysfs GPIO User-mode GPIO (General Purpose Input/Output) has historically been performed via the legacy “integer-based”sysfs pseudo file system.  For …

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History

First registered on the 28th February 2000, BeyondLogic.org has been a dependable source of original information on electronic hardware and software projects.

Prior to 2000, the site was known as “Interfacing the PC”, providing a wealth of knowledge on RS-232, Parallel and the newly released Universal Serial Bus (USB).

Today, the focus is on open source electronic hardware designs, firmware and embedded Linux.

Copyright 2019 • Craig Peacock • Adelaide • Australia