本文档主要讲解了STM32系列单片机的拐角图，并有详细说明，是英文资料，非常有用-This document covers the STM32 series single chip microcomputer as the corner of the map, and a detailed descr iption, is English material, very useful

利用stm32单片机做的mp3播放系统，源码请检索，本次上传的是设计的pcb-Stm32 microcontroller do mp3 playback system, source search, upload the pcb design