Serial interface device drivers, embedded processors, and video controllers

Abstract

The embodiment of the present invention discloses a serial interface device driver based on the Linux operating system, including: an interface function driver module, a data distribution driver module, a device driver module, and a hardware device initialization driver module; wherein, the interface function driver module uses To provide an operation interface to the user layer; the data distribution driver module connects the interface function driver module and the device driver module; the device driver module matches the hardware device initialization driver module through a virtual bus and is used for driver control A serial interface device connected to a serial bus interface. The embodiment of the invention also discloses an embedded processor and a video controller using the driver, which can achieve the technical effects of strong reusability of the driver program and convenient user layer access.

Description

technical field [0001] The invention relates to the technical field of embedded systems, in particular to a serial interface device driver, an embedded processor and a video controller. Background technique [0002] The SPI (Serial Peripheral Interface) bus is a high-speed, full-duplex synchronous communication bus, and it is widely used. SPI-based communication is a master-slave mode, which typically has a master device, usually the master chip side, and one or more slave devices, that is, the peripheral device side. [0003] The traditional SPI device driver based on the Linux operating system mainly implements the idea that each SPI device corresponds to a device driver, and each device driver provides a device node for the application layer (or user layer). In this way, the SPI device driver under the traditional Linux operating system is implemented for a specific SPI device and cannot be applied to other SPI devices; therefore, each SPI device must be connected to a s...

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Problems solved by technology

In this way, the SPI device driver under the traditional Linux operating system is implemented for a specific SPI device and cannot be applied to other SPI devices; therefore, each SPI device must be connected to a suitable SPI device driver. , which not only increases the labor cost of development, but also makes the kernel layer larger and bloated; and the biggest disadvantage of these SPI device drivers is that a large number of device nodes are generated, the user interface provided is not uniform, and user layer access is inconvenient

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