Serial interface device driver, embedded processor and video controller

Abstract

The embodiment of the invention discloses a serial interface equipment driver based on a Linux operating system. The serial interface equipment driver comprises an interface function driving module, adata distribution driving module, an equipment driving module and a hardware equipment initialization driving module, wherein the interface function driving module is used for providing an operationinterface for a user layer; the data distribution driving module is connected with the interface function driving module and the equipment driving module; and the equipment driving module is matched with the hardware equipment initialization driving module through a virtual bus and is used for driving and controlling serial interface equipment connected with a serial bus interface. The embodimentof the invention further discloses an embedded processor and a video controller which adopt the driver, and the embedded processor and the video controller can achieve the technical effects of strongreusability of a driving program and convenient access of a user layer.

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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