The Embedded Storage Controller For Digital Camera Based On The MO

It is urgent to develop a new communication technology for direct data transfer between embedded systems through the USB interfaces, which are widely employed in consuming digital products. This work develops an embedded storage management system based on MO for digital camera, which is consigned by Fujitsu Corp. The system can drive digital cameras and MOs through USB interface and it can read out the photos from digital camera then store them on MO disk directly. There are two kinds of USB interfaces, host and slave. This system is a kind of host device, which was commonly developed under Windows system with the bottom layer support by the operating system. The key point of the system design is to develop a host USB data transfer protocol stack in embedded system, which must be built from the ground. The host USB data transfer protocol stack faces a variety of USB devices. Digital cameras and MOs are USB mass storage class device mostly. It should be concerned that control codes used in MO and the management of the FAT file system besides obeying data transfer protocol defined in USB mass storage class specification. This thesis describes the storage management system from bottom to top and gives a common structure of the protocol stack used in USB host device. Although ISP1362 is employed as the USB control chip here, the protocol stack has the same structure besides the slight difference between the control registers when other chips used. This thesis is a guide to the developers who want to add USB host interface in embedded system. End of this thesis discussed the advantages of this system for easy USB host interface development in embedded systems and good expand ability. The system goal is to be a kind of common data interchange platform through USB interface finally.