| As communications technology and the rapid development of embedded technology, mobile phones are no longer just a communication tool only, in order to meet user demand for mobile phones has become increasingly diverse, providing a convenient tool to download the firmware has become an essential part of it. This article uses the MTK chip phones, their firmware download process used to analyze the technical principles and research. MTK platform is currently the mobile phone designer and manufacturer with a more complete solution for mobile phones, which provides a set of powerful, reliable software set, the module of its highly integrated features, fast shipping and low speed the price advantage of domestic mobile phone manufacturers to become the first choice.This article first cut from the MTK software platform, MTK software architecture of each module, including the communication protocol stack, MMI operating mechanism and Nucleus operating systems are described in detail. Flash memory followed the principles described and classified, NAND Flash and NOR Flash on the characteristics of each to do a detailed comparison, and described the Common Flash File System. Then download from the provided tools FlashTool MTK firmware download to start research and analysis, download the firmware for FlashTool logical processes, communications and related resource management consultation is done and described. FlashTool download firmware first use BootRom, to driver Download Agent downloaded to RAM and run until the completion of FlashTool and Download Agent communication handshake, and then start the firmware download process, the Flash write operation. Finally, download the firmware using the tools FlashTool experiments to verify its correctness. |
PDF Full Text Request