Embedded Digital Multimedia Network Teaching Termination System Design And Implementation

Digital terminal of multimedia network teaching system was a main part of network teaching system. The design method and implementation problem for embedded digital multimedia terminal of network teaching system were discussed in this paper. The system's functions and implementation's requirements were analyzed. Terminal system must had processing speed and good extensibility. So embedded real time operation system was used as frame. System structure integrated hardware platform and software platform.The main part of system was DSP. The soft development was based on DSP/BIOS embedded real time operation system. Network structure was double token chain bus. Network communication protocol was implemented by CPLD.In this paper, the emphasis was on the design and implementation of hardware platform and software platform for embedded digital terminal of multimedia teaching network. The hardware design included clock and power module ,the interface of PCM and DSP module, extensive memory module, the interface of network adapter and DSP module, and so on. The software design included system initialization, network communication protocol, static DSP/BIOS object configuration, the design of standard communication interface, real time multitasking voice processing system, and so on . The emphasis work of embedded digital terminal included four part. Building network communication protocol fiting one terminal device. Designing real time multitasking system that deal with TSK,SIO/DEV and HW1 object building real time multitasking module. Implementing standard communication interface, Programing device drive function table and control parameters of McBSP. At last, initialization of system register and McBSP register were introduce.It was proved that the design of system was successful by actual testing.