如何使用 STM32F1 的通用定时器， STM32F1 的定时器功能十分强大，有 TIME1 和 TIME8 等高级定时器，也有 TIME2~TIME5 等通用定时器，还有 TIME6和 TIME7 等基本定时器,将利用 TIM3 的定时器中断来控制 DS1 的翻转，在主函数用 DS0的翻转来提示程序正在运行.(How to use the universal timer of STM32F1, the function of the timer of STM32F1 is very powerful, there are advanced timers such as TIME1 and TIME8, the universal timer such as TIME2~TIME5, and the basic timer such as TIME6 and TIME7, which will use the timer interruption of TIM3 to control the turnover of DS1, and the main function is raised by the flip of DS0. The program is running.)