S3C44B0X处理器应用工程中引导加载程序的原理与设计

在嵌入式系统开发中,实现目标系统的脱机运行是一个重要的也是最后的步骤。根据ARM体系结构的原理,针对目前广泛使用的ARM7处理器S3C44B0X,设计了其应用工程的引导加载程序。该引导程序在系统上电复位后,完成底层初始化,并将应用程序代码由NORFLASHROM中拷贝至SDRAM中,随后在SDRAM中开始执行应用程序。该引导加载程序对ADS下直接开发的应用工程有通用性,对开发或者移植更为复杂的OS使用的BootLoader程序有一定的启发性和先导意义。

Principle and Design of the Boot Load Program in Application of S3C44B0X Processor

In the development of embedded system,an important and the final step is to make the target system booting and then running accurate itself.It means that the target system must work properly without the development environment.On the basis of principle of ARM architecture,a boot load program is designed for application projects of S3C44B0X processor,which is widely used in nowadays.The boot load program here is different from proper noun "BootLoader".After the power of target system is turned on,it performs the primal initialization of the system,copies the codes of application from NOR FLASH ROM to SDRAM,and then executes the application in SDRAM.It can be treated as preparation of development or migration of a BootLoader.