经过整合，把多个网站关于STM32　输出PWM的资料详细简单化，让不熟悉STM32定时器及PWM的朋友受益，绝对是精简的干货。可能有点朋友觉得简单，但这些很实用，很容易理解。让困难变的简单~~(After integration, a number of websites about STM32 output PWM data in detail, so that not familiar with the STM32 timer and PWM friends benefit, is absolutely streamlined dry goods. Some friends may feel simple, but they are very practical and easy to understand. Make it easy to change.)