stm32f103的定时器中断程序，调试过的好用的程序源码。-stm32f103 timer interrupt program, easy to use program debugging source code.

基于stm32F103的完整的定时器使用实例，利用TIM3完成一个定时功能并触发一个中断来实现LED的闪烁-Use a timer based on the complete stm32F103 instance, use TIM3 complete a timed function and triggers an interrupt to implement the LED blinks