Design And Implement On MMC Based On The Embedded System Of SEP3203

The embedded product already Seepage the aspects of people's life, Specially on information technology and networking high speed development today. The hand-hold information product is developing more and more market and have the huge user group. The Embedded operating system is the most essential core technologies. With the embedded operating system gradually becomes the core of embedded product, the people's demand on the embedded product are not merely sole-function electronic products.MMC card is common in the field of moving storage device, it has many advantage, for example, it is small, hot-swappable and can be conveniently used. So, it is largely used in many fields, especially in digital camera, mobile phone, MP3, PDA, Toy and so on. In embedded deviced, the MMC use realizes through the establishment file system.Embedded file system not only satisfy the common file system's request but also has some own characteristics because of the embedded equipment's particularities: the particularity of storage medium; the special request of fast-restores; multiplicity and dynamic-assemble; security of cross operation platform; timely of whole system; The data saved by the document form may facilitate to read the MMC main memory. The FAT file system can be recognition by the majority operating system for its splendid document management performance.The paper discusses how to build a common FAT12 file system on MMC, which is based on one hardware platform called SEP3203(one ARM7 chip). After understanding theories of MMC'command and embedded file system, we can establish FAT file system by developping drives of MMC, which make it possible fordata migration and data storage of embedded system.The result of this paper has a further practical value, and it can easily settle the short of storage in embedded device.