ARM的PWM程序简单应用，本文是通DS0小灯来观察现像的。-ARM-PWM simple application。Can refer to for example the STM32 take a look at this program is my understanding

STM32程序总结 串口 按键 指示灯 数码管显示 ucos_-STM32 summary Serial port Key Indicator light Digital tube display ucos_ii