Design Of Embedded Data Exchange Terminal Based On PowerPC

Real-time data acquisition and high-speed data transmission becomes one of the key digital equipment links in various fields. At the national 863 Project "KEY TECHNOLOGIES AND EQUIPMENT OF METAL MINING SEISMIC EXPLORATION", it is necessary to use a collector array constituted by a hundred of seismic data acquisition stations to achieve large-scale array data acquisition. In order to complete the centralized data storage and processing, data collected by every data acquisition station needs to be transmitted to the control console in real-time.863 sub-project "KEY TECHNOLOGY RESEARCH ON METAL MINING SEISMIC DATA EXCHANGER" is set up to solve this issue, and it intends to use a new communication technology to solve the field seismic data transmission problem. In the context of this project, this thesis designed a multi-port network data transmitting terminal based on PowerPC, and completed hardware system design, debugging and U-Boot porting.Using Freescale's MPC8360E processor as the core, this thesis designs the data transmitting terminal hardware system, which mainly includes MPC8360E basic system, power module, memory module, network interface module and UART interface, programming interface.Its main duties include:Schematic design. According to system requirements this thesis designed hardware circuit of data exchange terminal.The system uses 3.3V power, and has 5 10/100M network interfaces, a UART interface, a JTAG interface,128MB SDRAM,16MB NOR Flash,512MB NAND Flash.The operating temperature range of whole system is -40℃～+105℃.PCB drawing. Based on the considering of power integrity, signal integrity and electromagnetic compatibility, PCB design focuses on several key issues, such as data exchange terminal circuit board layer, circuit board layout, circuit board wiring, power and ground plane processing and so on.System debugging and testing. Complete the establishment of debugging environment, CPU starting up and reset control words reading, SDRAM testing, NOR Flash testing, serial debugging and network module debugging gradually.U-Boot porting. Based on analysis of u-boot-1.2.0 and according to the storage mapping of data exchange terminal resources, modify u-boot-1.2.0, customize the new U-Boot which is suitable for the target board, finally compile and program it into the data exchange terminal.Hardware testing proves that the hardware system designed by this thesis can work properly and the system provides the basic platform for the upper application software.