基于ARM核的嵌入式应用系统中的启动代码的编程

启动代码是针对基于32位ARM核的嵌入式系统的应用软件所编写的一段汇编程序,通过它将C语言编写的应用程序从FLASH存储器映射到SDRAM存储器,提高了系统的运行速度.启动代码实现了堆栈初始化、中断初始化、外围初始化等操作,大大提高了系统的开发效率及软件性能.本文详细介绍了对基于ARM核的32位嵌入式应用系统中启动代码的编程步骤,给出了一个具体的应用实例,并结合此例对代码的编译及调试过程进行了阐述.

Realization of Starting Code Based on the ARM 32 Bit Embedded Application System

The starting code is a piece of assemble code for application software of the 32 Bit ARM core Embedded System, which maps the C-based application code from FLASH to SDRAM, thus improving the system's speed. The starting code also realizes initialization of stack, of interruption and of outside devices, greatly improving the efficiency of software's development and performance. This paper introduces the realization steps of the starting code based on the ARM 32 Bit Embedded Application System with a specific example given. It also presents code debugging and realization.