Design of Reusable Software for USB Host Driver in Embedded System

Based on a test and control platform with CPU intel strong ARM*SA-1110 (ARM7) and real-time operating system (RTOS) with windows CE, this paper analyses and expatiates design and realization method of a universal serial bus (USB) host module based on USB host controlling chip ISP1161BD, including the design scheme of USB host function module, the frames of USB host hardware circuit, the design method of embedded USB host driver procedure, and the realization mode and operation process of this scheme. According to the primary and correlated function of host driver procedure, aiming at the key problems of general USB device driver procedure interface and lower layer data management of host controller driver procedure, the settlement scheme key data structure and concise remarks are given. The actual debugging and running show that as long as load a certain type of USB device drivers, it will be able to achieve the monitoring and control platform with the appropriate USB device to communicate.