Design Of Processing Audio Signal And Transferring Digital Datum In Network Based On ARM

There are many audio devices based on ARM (Advanced RISC Machines) processor, such as mobile telephone, MD (MiniDisc), DVD player, MP3 audio encoder; also, there are many network devices based on ARM processor, such as modem, network computer, internet equipment. Devising a device based on ARM with the function of processing audio signal and communicating in network must be a new attempt. If this device is designed successfully, it will provide a new realizable means for leaving words in network.This article introduces the design and development process of embedded system detailed in the way of combining with a specific embedded data collection system, which uses an ARM9 chip S3C2410 as its processor. The process includes:Set up the cross compiling environment: The cross compiling environment is the name of all the embedded developing tools. To set up a cross compiling environment is to compile and install the tool chains needed in development.Transplant of OS kernel: This is one of the main developing units of embedded system, to transplant the OS kernel is to configure the kernel again to make it meets specific requirement, and then compile it again to generate the executable OS kernel image file.Transplant of file systems: File system is the effective and necessary assistant of an operating system to manage the data. Transplant of file systems include making file system's image, assigning the memory for them in a flash chip and valid cooperate of file systems and the embedded OS.Design of drivers: Driver is the bridge of OS and hardware to communicate. Design of drivers is to write functions which to read, write and control a specific hardware, and to offer a common interface for the OS.This paper introduces the technology used in development, questions met in the development and the settlements of the questions. The forth chapter introduces how to gather and deal with the voice data based on a UDA1341TS chip, and introduces the net communication, net driver, problems met in net development and the settlements of the problems based on a CS8900A chip.