stm32 pwm 通过函数接口控制占空比和周期，只是一个.C文件，但是非常好加到工程里面。-stm32 pwm duty cycle and cycle through a function interface control, just a C file, but added to the project inside very good.

stm32学习资料,是学习嵌入式的好助手-STM32 STUDY (C- C++) IS NEEDED, GOOD JOB GOOD HALLPY

STM32串口通信程序，在中断处理，适用于STM32f103zet6单片机(STM32 serial communication program, interrupt handling)