基于STM32F103的MP3播放器完整项目源代码，包括原理图，绝好的资料。-The MP3 player on STM32F103 complete project source code, including schematics, excellent information.

Simple hardware PWM using timer 3 in STM32F103.The STM32 F1 is a series of mainstream MCUs covering the needs of a large variety of applications in the industrial, medical and consumer markets. With this series of products, ST has pioneered the world