Embedded Real Time Communication Module In Navigation Receiver

In the practice of the navigation system, it is made up of secondary planet, the earth station and navigation receiver. Navigation receiver is the base of navigation system. Our receiver is in the earth station, it can receive the data of multitude secondary planet and multitude frequency at the same time, the whole process is highly called for real time property and high speed property, so it need a module to do this work. Usually the receiver use the extend serial of DSP to communicate with outside, but it takes many problems: data transmission speed is not enough, it can't transform the protocol, and the real time property can't be guaranteed.To solve the problem above, this paper puts forward the design of real time module. It explores the real time module'BSP successfully and achieves the ISA communication based on ISA. It puts forward the communication from one point to multiple point and design the transmission protocol which the real time module uses to communicate with inside and outside of the Recmonitor. In the end it designs the PC software. In the use of real time module, It can assure the data from DSP to watch station being sent correctlyAll the researches are carried out fully considering engineering applications. Embedded real time module has been successively used in the independent satellite navigating system of China.