stm32奋斗开发板子，用来演示U盘工具的程序，让我们有一个比较深刻的认识。-stm32 struggle development board, U disk tool used to demonstrate the procedure, so we have a more profound understanding.

这是STM32F107芯片的SD卡模拟U盘的程序，经过测试。(This is the STM32F107 chip SD card simulation U disk program, tested.)