Isos-based Device Driver Design

This thesis mainly deals with the device drivers design based on ISOS(Integrated Software On Silicon), according to the quick development of xDSL technology, ethernet technology and ADSL2+ Router in recent years. The thesis discusses the BUN module of ISOS 9.0 and it's messages process, Build-in Device drivers, Ports, Channels, Attributes and the relationship of each interface. Based on the discusses, the thesis give the point of device drivers design on ISOS BUN module, and design of Ethernet switch chip driver.The thesis discusses the background of ADSL2+ Router, the significance of master the device drivers based on ISOS in the first chapter. Then it introduces the development of xDSL technology all over the world. Finally the object and research direction of this thesis are also given.In the second chapter, xDSL technology and Ethernet technology are introduced first of all. the embedded operation system and ISOS are introduced, too.In chapter three, we discusses the BUN module of ISOS and it's messages process, Build-in Device drivers, Ports, Channels, Attributes and the relationship of each interface.On the base of the discussion of BUN module, the paper states the scheme of device drivers design in chapter four.In chapter five, the thesis states the ADSL2+ Router's system and it's architechture. Then it gives the functions analysis of Ethernet switch chip ADM6996M.The chapter six is the main part of the thesis, which is dedicated to the detailed design of the Ethernet device driver. First the overall software scheme is listed. Also the method of Requirement analysis are stated. In the end, the thesis expatiates design and implement of the device drivers software and so on.In the chapter seven, the thesis gives general concept of test for embedded technology and some test cases in our system.In last chapter, it comes to a conclusion of the research and the prospect of further work.