![]() In some cases this can be changed programmatically, making the difference largely irrelevant. Which node is used affects how certain serial control signals, such as DCD (data carrier detect), are handled when the device is opened. These provide access to the same physical device via two different names in the /dev hierarchy. The user often does not even know or care what type of UART is in use.Ĭlassic Unix systems often provide two different device nodes (or minor numbers) for serial I/O hardware. The low-level driver not only maps the device into the file system with the help of the kernel, it also encapsulates the particular hardware.
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December 2022
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