![]() ![]() Under Linux, as with most Unix systems, device drivers themselves are part of the kernel.Īll device files are stored in /dev directory. When you access such a device “file,” the kernel recognizes the I/O request and passes it to a device driver, which performs some operation, such as reading data from a serial port or sending data to hardware.ĭevice files (although inappropriately named, we will continue to use this term) provide a convenient way to access system resources without requiring the application programmer to know how the underlying device works. They are not normal “files”, but look like files from the program’s point of view: you can read from them, write to them, mmap() onto them, and so forth. The device file allows transparent communication between user-space applications and hardware. The device file is important to communicate with the hardware. But I did not create any device files under /dev/ directory. But if you see, it will create a major and minor number. In our last tutorial, we have seen how to assign a major and minor number. Device File Creation for Character Drivers You can also find all the Linux device driver’s video playlists here. You can find a video explanation of this tutorial here. If you aren’t set up anything yet, we suggest you to set up the boards that you have using the below-given tutorials. To continue with this tutorial, you must have set up the Ubuntu or Raspberry Pi or Beaglebone. ![]() ![]() Device File Creation for Character Drivers. ![]()
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