You are free to create this wherever you want (you can do exactly as I have On the home directory, I created the pcdm.c file (which is the characterĭevice driver source code) in the /custom_drivers/character_drivers/multipledevs directory. I created mine my home directory on my linux operating system. The first thing that you want to do is create a directory on your computer where you will We will replicate in software simple memory buffer devices, which will function as our character devices. This way, you can see how a character device driver works without actually We will create pseudo character devices in software only. This means we won't use any actual hardware devices. In this program, we will create a character device that creates and manages pseudo character devices. In this case, you would have 4 ADC sensors, sensor 1, sensor 2, sensor 3, and sensor 4. For example, you may connectĪ character device driver that uses ADC sensors to record data in the front of the device, 2 for each of the sides and one for the back. For example, it may be a character device driver that has multiple sensors that are used for different purposes. You may want to create a character device driver that manages multiple devices.
Not every time you create a device driver will it always be for a single character device.
#Adding char driver to kernel linux how to#
In this article, we show how to create a linux character device driver with multiple devices. How to Create a Linux Character Device Driver with Multiple Devices
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