Embedded Programming with Modern C++ Cookbook

Using libgpiod to control GPIO pins

In the preceding recipe, we learned how to access the RTC using the ioctl API. Can we use it to control GPIO pins as well? The answer is yes. Recently, a generic GPIO driver was added to Linux, along with a user-space library, libgpiod, to simplify access to devices connected to GPIO by adding a convenience layer on top of the generic ioctl API. This interface allows embedded developers to manage their devices on any Linux-based platform without writing device drivers. Additionally, it provides bindings for C++ out of the box.

As a result, the wiringPi library has been deprecated, despite still being widely used because of its easy-to-use interface.

In this recipe, we will learn how to use the libgpiod ...