基于PC104和DSP的分布式导航计算机设计

Design of Distributed Navigation Computer System Based On PC104 & DSP

单独采用PC104不能很好的实现多传感器的数据采集和导航解算双重任务,本文基于PC104的堆栈式结构,以TI公司TMS320F28335浮点DSP为核心处理器设计了一款双CPU、分布式、小型化的导航计算机。通过PC104总线扩展MOXA多串口卡实现微惯性测量元件MIMU和GPS的数据采集,而在DSP中完成导航算法和组合导航参数的解算。PC104与DSP之间的高速数据通信通过扩展双端口RAM实现。

The dual-task of multi-sensor＇s data-sampling and navigation solution could not well be realized by the single PC104.Based on the stacked structure of the PC104, a new kind of distributed, small-sized and double-microprocessor navigation computer system was designed in this paper, and took the floating Digital Signal Processor TSM320F28335 as the core.Data-sampling of the MIMU and GPS was realized by the extended multi-serial board of MOXA based on the PC104 bus while the algorithm of navigation and solution of parameter of the integrated navigation were finished in the DSP.Dual-port RAM was extended for the data communication between PC104 and DSP.The address logic-selection and time sequence controlling of the system were achieved by CPLD.