Software Design And Implementation Of Graphics Card Testing System Based On B/S Mode

With the development of the technology of display, there are more and more high-resolution display devices, which require a high-quality graphics card. To keep high-quality of the graphics card, the test link is essential. As an important part of the computer component testing systems, isolation of the test fixture and test operation of the device is very necessary to avoid affecting the test operation of the device under test card. One solution is to design a special test fixture which connected with the test operation of the device via the LAN port, set up a similar structure in the form of the LXI instrument test platform. This article designed software on this platform.This thesis proposed the B/S structure software for graphics test, according to the test requirements, combined with graphics structure, testing technology and network technology. Achieved the function that includes graphics basic information storage, color rendering and output, VGA line synchronization signal and field synchronous signal output test. In hardware, it forms an embedded computer platform through the COM Express technology. Then the test program which is developed by the LabWindows/CVI runs on this platform. The test program combined the test execution module with Web service module, which ensures it could perform testing instructions as well as a web server. And it occupies fewer resources and high operating efficiency.As the focus of this development, web service module is designed procedures based on TCP protocol which parsing and packaging the HTTP message, and developed several operation web pages and script files and designed redevelopment interface. During the test, the browser sends the test request to the server which in the same network by HTTP message. Once received the message, the server will parse it soon, and performs the web service module to send pages or call the displaying test execution module according to the results of analysis.The test execution module is another weighty content, which mainly obtains the basic information of graphics, controls the GPU for rendering the specified solid color or set the specified display mode depending on the operating commands. Once successful, the fundamental output signal of VGA interface of the platform should be tested by an oscilloscope.Finally, the developed system was tested. As a result, it achieved the proper communication between the browser-side and server-side successfully and also rendered the specified color and changed display modes correctly, and the indicators meet design requirements. The final test results of this paper certified the correctness of the test method, the integrity and availability of the designed software.