Multi-display output method based on Feiteng processor platform

Abstract

The invention discloses a multi-display output method based on a Feiteng processor platform. The method includes steps of (1) mounting at least two graphics cards; (2) initiating each graphics card and CRTC (cathode ray tube controller) thereof sequentially when an operating system starts up, obtaining total size of buffer frame space of the CRTC, reserving reserved virtual memory space as large as the buffer frame space, one to one mapping frame buffer of the CRTC with virtual memory addresses in the reserved virtual memory space sequentially; (3) caching a picture to be output in the reserved virtual memory space in real time, the CRTC reads the picture segment stored in the virtual memory addresses mapped with the frame buffer of the CRTC, transforms the picture segment into output signals and outputs the signals to the display. The multi-display output method based on the Feiteng processor platform needs no modification of existing video card, is fine in video card compatibility, low in hardware performance requirement, high in display output efficiency, and low in implementation cost.

Description

technical field [0001] The invention relates to the field of multi-screen display, in particular to a multi-screen output method based on a Feiteng processor platform. Background technique [0002] The multi-display output method, also known as display wall technology, is generally used to realize the image output of super-large screens, and is currently widely used in command and dispatch, media display, financial trade and other fields. Existing display wall technologies generally realize multi-display output through specialized hardware devices, and these specialized hardware devices are called large-screen processor splicers. However, large-screen processor splicers are generally implemented based on the x86 platform. The Feiteng processor of the Phytium processor platform is based on the sparc architecture, which is incompatible with the x86 architecture. If you need to develop a large-screen processor for the sparc architecture The splicer needs to design special hard...

AI Technical Summary

Problems solved by technology

However, there are the following limitations in the method of increasing the number of CRTC controllers and frame buffers on a display device to realize multi-screen output: 1. This method realizes multi-screen display by using the window manager (window manager, which is the drawing of the display image) Programs) are respectively written into the frame buffer corresponding to the CRTC controller, which requires data processing on the screen to be displayed, high hardware requirements, and low output efficiency; 2. The addition of the CRTC controller and frame buffer to the graphics card will result in higher costs; 3. Increase The CRTC controller and frame buffer are constrained by the size of the graphics card; 4. Due to the addition of the CRTC controller and frame buffer fixed in the graphics card, the scalability is poor; 5. These implementations are often based on the x86 architecture and cannot be processed with the sparc architecture. processor compatible

[0004] To sum up, the Phytium processor platform currently has no better multi-display output method, which seriously restricts the application and promotion of the Phytium processor in the field of multi-display

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