The Design And Realization Of The Windows CE Vehicle Navigation System Modem Driver

Windows CE embedded system is a new operating system, which is launched by Microsoft and with multi-tasking capabilities and powerful communications capabilities. its range of applications in the field of embedded mobile devices, embedded applications, electronic products, information equipment, etc. with the special features of the PC can not be replaced. With the continued development of the communications industry, a growing number of electronic devices into our daily lives. Accompanied by modern networks, computers and multimedia development, as well as information appliances, GPS satellite navigation, in-car platform, set-top boxes, mobile phones and other embedded systems applications, represented by the extensive development of embedded systems has gone deep into the life. Followed, it needs more functionality embedded device softwareand peripherals design requirements to meet the needs of people living.Of this topic is to develop a vehicle navigation platform system with entertainment features, research solutions based on the Windows CE USB Internet. From the point of view of the experience of those who study the functional requirements of the navigation system, as well as intelligent Internet Internet user needs to make full and complete intelligent Internet solutions, allowing users quick and easy access. In the course of the study, the driving characteristics of the OEM for the subject of non-standard Microsoft architecture, horizontal analysis of the the mature the USB design features of the standard Microsoft architecture, combined with the OEM-supplied USB underlying driver source code, thus proposed for USB Internet driven underlying complement the design and upper development programs, the development of a number of column design process.This paper describes the design process of the Internet based on the Renesas SH7724processor R2R platform on in Wince6.0operating system versions USB device driver. This sub-analysis of the first of the USB protocol and USB CDC subclass agreement3G card needed in the design of the place, and with particular attention to the local studies3G card data characteristics to identify with the USB CDC/ACM The similarities of the model and provide a reference for the development of programs. Secondly, the USB drive in Windows CE system architecture analysis of, and contrast this topic, USB driver architecture, a clear understanding of the USB driver development. USB CDC/ACM driver finally began to design, including phone models and three3G card support, and the API interfaces designed intelligent dial-up, to complete USB Internet solutions.