Design Of The Interface Based-on The Davinci Platform

With the rapid development of computer and signal processing technology, the point to point underwater acoustic communication technology has become more and more matured. Whether it is data communication or marine environment monitoring, they all result in an increasing demand of data acquisition, processing and transmission. Therefore, the study in this paper was aimed at building a convenient hardware platform for data acquisition, processing and transmission, which is based on the Davinci platform.The main work in this paper was to accomplish the interface design based on the Davinci platform, which includes power supply design, the outer interface design of Davinci core board and FPGA, and the interface design of audio codec chip TLV320AIC33. In every part, the principles of selecting main chips and features of these chips are described in details, as well as the circuit diagrams and the main thoughts of interface design.Based on the hardware platform, the software was designed, the main purpose of which was to complete data acquisition. And the migration of embedded systems was realized. System initialization of Davinci was undertaken at Linux environment, and drivers of EMIF interface device were compiled. Initialization of TLV320AIC33 was completed through the I2C, and the application programming for communication between ARM and FPGA was also accomplished.