第1章 系统节拍定时(SysTick)..............................................................................1 1.1 SysTick功能简介.........................................................................................................1 1.2 SysTick基本操作.........................................................................................................1 1.3 SysTick中断控制.........................................................................................................3 1.4 SysTick应用：模拟PC按键重复特性......................................................................5
