Mspf449 And Usb Interface For Data Acquisition System

In the application of Field,we need to deal with a variety of signal.So lots of data acquistion system emerged.With the development of technology, the function of Low-Power, high-speed, portability and popularity are more and more overvalued. The system discusses the process of the data collection and transmission buy USB bus.The sensor technology,signal processing technology and micro-computer technology constitute the basis of modern detecting techniques..This paper describes a solution of the data acquisition,the composition and properties. In the hardware design part.Signal from the sensor is filtered and amplified.,then the data can be display in the led or transferred to PC by USB bus. In the design, the reset circuit can make the hardware system more reliable. In order to meet the requirements, hardware uses the theory of the minimum-power with modular and open design. So this thesis designs a new system of data acquisition with USB interface,which chooses the ACD12 and CH372 module as the analog digital converter and USB inerface.This thesis also elaborates the signal communication on the connection of CH372 with PC through the USB BUS,and also brings up the method of in hardware design, In the software design part the thesis introduces the knowledge of the USB BUS in first.,then illustrates the software design at each hardware design part,Including the program in temperature acquisition module,AD module,display module and USB underlying driver module.as well as the PC software's design in the flow diagram,steps and application method.Choosing the VC++in the sofeware design.VC++has a powerful,easy-to-use,simple operation and friendly interface features, it can meet the requirements of the system. In the system debugging part,the method in debugging is bringed up as well as the solution.Ultimately This thesis designs a data acquisition system with MSPF449 and USB interface, achieves the goal of the data transmission in USB interface,and data display in PC's software.This design submit a method in Low-Power, high-speed, portability and popularity...