stm32中利用系统滴答定时器产生的1ms时基准确延时程序，用于LED灯地闪烁-the use of the system tick timer stm32 produce accurate time-base 1ms delay program for the LED light flashing

使用系统节拍定时器SysTick精确定时，实现LED1和LED2交替亮灭的效果。开发环境：TKStudio-System tick timer SysTick can fix time precisely. The result is LED1 and LED2 alternating on and off. Development environment is TKStudio.

SysTick 寄存器配置 SysTick 配置项 SysTick 中断配置流程 SysTick 中断处理流程(SysTick register configuration SysTick configuration item SysTick interrupt configuration process SysTick interrupt processing flow)