R&D Of 2~n Pseudo-random Information System Based On ARM Linux

With the constant improvement of hardware and software of computer, the development of embedded has also made considerable progress. At present, the integration of the embedded and Linux technology is promoting the rapid development of the embedded technology, and research and application of embedded systems has changed a lot.In terms of hardware, embedded platform gradually rises from eight-machine system of 51 series kernel to 32-bit systems with the mainstream of ARM. As regards software, as an important milestone in the history of development of the Linux operating system, Linux gains extensive application in the fields of government, national defense, education, industry and so on because of the advantages of high security and stability and free open etc.2~n pseudo-random IP multi-channel theory (pseudo-random theory), which was put forward and named by academician He Jishan, the essence of which is to send composite waves with 3,5,7...Multi-odd frequency wave to the earth in the same period, and the receiver receives current response of main frequency of composite waves transmitted through the medium of the earth at the same time. In the field of geophysical exploration, as the theory of pseudo-random data acquisition system has many advantages, such as strong anti-interference capability, great accuracy, high-speed observation and portable devices etc, it has been used widely.Based on the analysis of pseudo-random theory, this paper combines with the latest achievements of the current development of embedded software and hardware, and studies the ARM Linux Embedded Information System.First of all, analysising and comparising of the various DAQ projects design the overall scheme. Through the analysis of the data acquisition system driven, using audio chip of embedded onboard realizes the transformation of Data A/D, and converting the original audio drivers completes the acquisition of Linux device driver programming.Secondly, according to software development processes of embedded, using the ARM9 core S3C2410 embedded processor and hardware platform establishes embedded Linux cross-development platform; cutting and transplantation Linux kernel builds embedded file system.Thirdly, making use of the current popular embedded graphics library Qtopia Core and combining with Linux multithreading technology design data acquisition applications, and establish application software model of Data Acquisition System. Then test the whole system and compare with the theoretical data based on the above procedures.Finally, this paper concludes the inadequacies of the study, and puts forward some suggestions of improvement of the system in later period.