Design And Implementation Of Embedded Data Acquisition System Based On Longson SOC3210-DEV And Qt

In the process of data collection, the controller's selection is particularly important, as the core of the data acquisition system, control the whole system to complete the data collection and process the collected data. Now the master of data acquisition system is mainly assumed by the single chip, computer. For the single chip, because of its single function, leading to the sampling rate and sampling precision are subject to certain restrictions, and it have not the operating system, which makes operability and visibility in the process of data collection have been affected. For the general-purpose computer, the user can not deal with it flexible because it is too big. Therefore, both have some limitations as the master of data acquisition system.For the above, developed a small, diverse sampling function and good user interface data acquisition system is necessary.Based on the research of existing embedded data acquisition system, the thesis chosen hardware platform is development board SOC3210-DEV which is based on our self-developed Loongson 1 chip, designing an embedded data acquisition system with a Linux operating system. This system is based on computer technology, it's software and hardware can be cut, and have rich peripheral interfaces, which is well suited for data acquisition system.In this thesis, SOC3210-DEV development board is the master of the whole data acquisition system, and operating system is Debian/Linux. SOC3210-DEV provides us with rich peripheral interfaces, including IIC interfaces, UART serial port, displaying interface and so on. So that we can transmit the collected data come from collectors through IIC bus and RS-485 bus, the development board comes with an LCD display, which can be used to display images of data collection, combined with Sqlite to control and save collected data.In order to facilitate user operation and control, prepared LCD driver and keyborad drive and transplanted into the development board. Besides, design of GUI-based control and query module based on Qt development environment.Taking temperature and pressure as an object, the designed system conducted a data acquisition testing as in the laboratory environment, working condition stable and date is reliable.