How to Build and Test a Simulated GPIO Character Driver on Linux

This tutorial walks through creating a Linux kernel character driver that simulates four GPIO devices, compiles the module, loads it to automatically generate /dev/mygpio0‑3 nodes, and provides a user‑space program to control the GPIO states via ioctl, including full build and cleanup steps.

CGPIOMakefile

0 likes · 12 min read

How to Build and Test a Simulated GPIO Character Driver on Linux

Liangxu Linux

Jul 22, 2022 · Fundamentals

How Linux Character Device Drivers Work: From Open Call to Kernel Integration

This guide explains what a Linux driver is, classifies character, block and network devices, walks through the open() system call flow from user space to the kernel’s VFS and driver list, and shows how to write, compile, and load a simple character device driver module.

Kernel ModuleLinuxSystem Call

0 likes · 20 min read

How Linux Character Device Drivers Work: From Open Call to Kernel Integration