Based On The Design And Realization Of Embedded Linux Electromagnetic Environment Simulator

As an important equipment,electromagnetic environment simulator could comprehensively assess the anti-jamming performance of the radar equipment and enhance the army's fighting capacity.It gets more and more attention at home and abroad.In this paper,electromagnetic environment simulator control system which based on ARM-Linux is reserched.Firstly, based on the overall functional requirements of electromagnetic environment simulator,the overall design scheme of electromagnetic environment simulator control system is given,and then,the schematic diagram of electromagnetic environment simulator based on AT91SAM9G20 is designed and the main components of the circuit are presented. Secondly,the transplantation process of embedded Linux system is deeply researched in the paper.On the basis of Embedded Software Development Environment built,U-Boot,Linux kernel and the transplantation of the root file system of Cramfs is realized.Thirdly,this paper expounds the development process of Linux device driver,and realized PIO, SPI, bus, TWI, keyboard and the LCD monitor device drivers according to the characteristics of the system hardware.Later, in accordance with the overall process of the electromagnetic environment simulator control software and the thought of modular design,the initialization of module,main loop module and human-computer interaction module are written.Finally, each module is tested repeatedly in the laboratory to solve many existence problems.Then, each function of electromagnetic environment simulator is perfectly realized in the outdoor experiments. Experiments were fully proved the correctness of the system software modules.