Research And Implementation Based On SD Storage Method

Consumer electronic products has become increasingly popular, along with equipment for different requirements of the storage capacity has gradually increased, while the SD memory cards are an innovative, always evolving bridge media powering the future of the digital world. SD memory cards deliver high-performance products that allow consumers to quickly capture video, photos, and sound in a reliable, easy-to-use format.SD technology is the de-facto industry standard for mobile phones, digital cameras, MP3 music players, personal computers, printers, car navigation systems, electronic books, and other consumer electronic devices. SD technology is used in some 400 products across dozens of product categories and in more than 8000 models.SD memory cards are available in standard and high-capacity formats along with a variety of speed classes. A next-generation SD memory card specification, SDXC (eXtended Capacity), will soon be released to SD Association members who will create cards and devices that support its greater memory capacity and faster performance speeds. The cards have the broad interoperability and compatibility needed to ensure that its applications will continue to expand far into the future.To aim at the products with ARM embedded host controller and real-time operating systemμC/OS-II , design a SD storage solution based on Samsung S3C2440A, In terms of hardware, connect the S3C2440A internal control functions with SPI with SD card interface modules in order to achieve the standard SD expansion card interface functions.On the software side, completed theμC/OS-II on transplantation to the S3C2440A, while analysis of theμC/OS-II memory management methods, and the memory control block data structure was revised, and make use of double link list to increase the memory partition separated the functions of the release as well as the merger. SD card driver was programmed according to SD agreement. Completed read-write operation of 2G capacity, and the establishment of a small FAT16 type of document management system can manage the inner data, create file as well as open or shut down function. Document can be found according to name. At last, the experimental data was displayed on the LCD.