单片机时钟程序，调试已经完成，初学者可以参考。-Single-chip clock procedures, debugging has been completed, beginners can refer to.

适用于STM8系列的单片机使用、主要是串口驱动、引脚定义、时钟中断、外部中断、低功耗模式、外加一个小例程。-Applicable to STM8 series of single-chip use, mainly serial driver, pin definition, clock interrupt, external interrupt, low power mode, plus a small routine.