/rasp-linux-driver-example

A simple example of how to create a Linux device driver and load it on the Raspberry Pi 3

Primary LanguageC

Rasperry Pi - Linux driver example

A simple example of how to create a Linux device driver and load it on the Raspberry Pi 3.

Dependencies

  • Kernel headers

    • sudo apt install raspberrypi-kernel-headers

  • Current kernel build directory must exists:

    $ ls /lib/modules/$(uname -r)/build
  Documentation  Module.symvers  certs    fs       ipc     mm       scripts   tools
  Kconfig        arch            crypto   include  kernel  net      security  usr
  Makefile       block           drivers  init     lib     samples  sound     virt

How to compile

To build

$ make

To clean build

$ make clean

How to install driver

sudo insmod driver-example.ko

How to check

$ dmesg
[  132.515291] driver_example: loading out-of-tree module taints kernel.
[  132.515774] Init function