| At present, the technology of embedded system is one of the most popular technologies in electronic manufacture field. It is widely applied in many fields.Participate in the development of embedded gas calibrating device, which is subsystem of air quality monitoring system. The mechanisms of Flash memory and design pattern of embedded GUI are In-depth studied, and the embedded Flash file system and GUI module are designed and implemented, besides, gas calibrating device is developed by using these two techniques.Flash memory and principle of embedded file system are studied, there are some differences between Flash memory and magnetic disk in working mode, the memory mode in traditional mode is not suitable to Flash memory. Therefore, an embedded file system that adapts the Flash memory at this embedded system was designed, to be beneficial to the development of embedded applications for data storage. The Flash file system provided tree form catalog management, mechanism of file attribute and right of operation, the balanced erase arithmetic.The display method of LCD was studied. The graphics display and logic of business should be uncoupled, and some GUI modules about MVC model are designed. The display mode and operation of logic are separated, so that the application developers do not considering how the screen displayed.Finally, the application of embedded gas calibrating device is developed based on the Flash file system and the GUI module. |
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