基于ARM Cortex-M3的SysTick解析

Analysis of SysTick based on ARM Cortex-M3

SysTick是嵌入式系统中不可缺少的组成部分.本文介绍了SysTick的基本功能和相关寄存器的定义,给出了SysTick的运行机制,并结合SysTick定时实例分析了ARM程序的基本结构、主程序工作流程和产生定时误差的主要原因,程序对设计ARM上位机系统具体一定的借鉴意义.

Sys Tick is the necessary part of embedded system. The the basic functions of Sys Tick and the definition of relevant register were introduced. The operating mechanism of Sys Tick was presented. And the basic structure,main program flow and the main reason for timing error of ARM combined the Sys Tick timing example were analyzed which has certain reference significance to design the upper computer system software on the ARM.