Embedded Usb Minihost System Design And Implementation,

The Universal Serial Bus is a new technology for connecting peripheral devices to computer. Compared with the traditional PC interfaces such as serial and parallel port, the USB combines the advantages of higher data transfer throughput, plug-and-play, hot swapping, expandability and low-cost. It's not long before the USB has become the requisite standard interface in PC after the USB specification was issued.The embedded USB host system which is designed in this dissertation will solve the problem that embedded systems are not able to make use of USB devices. Each USB data transfer is initiated and controlled by the host. Every USB device can only connect to the host and can not communicate with each other directly. But at the present time, most of the hosts are PC. All the USB devices we can buy now can be used only when they are connected with the USB Host. These USB devices can not communicate with each other without PC.To begin with, the thesis presents an overview of the universal serial bus specification, and then introduces the basic knowledge of the USB protocol. Next the whole procedure of research and development of the embedded USB host system used with MB90F337 MCU (Fujitsu) is fully described, including hardware designing and software programming. And an all-purpose USB host system based on MB90F337 MCU (Fujitsu) is designed. At last, this document illustrates how to fulfill the USB device class program with a USB printer is the target device to be used.