The Portable Data Storage System Based On USB

USB interface device has the characteristic of convenient-use , high-speed and it supports to use once it's inserted in PC. The development of USB devices is difficult because of the annoying protocol. With the gradually expand of USB's application, folk's expectation for USB is higher. People hope that USB can be applied to various fields, especially ambulant data field, and hope movable device can communicate with USB interface device, i.e. USB interface device can be applied to non PC field. How to apply USB to embedded system and realize point-to-point communication. It has became the hot of USB research field now.This thesis introduced the Host-Slave controller SL811HS and the application in the embedded system . In the base of introducing the characteristic of this chip, this thesis mainly explained this chip how to identify the flash disk and how to write data to the flash disk according to several protocols. These protocols include FAT File System Specification , USB Specification and UFI Mass Storage Class.We adopted the AT89C55 which is compatible with MCS-51 products entirely, except the Host controller SL811HS. AT89C55 has 20K bytes of in-system reprogrammable flash memory. So we needn't to extend the RAM and simplify the hardware.This system has realized the data storage for the flash disk and it has the characteristic of high-speed and mass storage . System's capacity of anti-jam is strong. For the slave host it has the simple protocol of serial bus which would fit the demands of general purpose of data storage system.Candidate: Liu JinfengMajor: Agricultural electrization and automatization Supervisor: Prof .Yang Fang...