一个关于stm32单片机的IAP例程，keil-mdk编译，通过uart串口接收上位机软件升级的bootload.-A microcontroller on the stm32 IAP routines, keil-mdk compiled by uart serial port to receive PC software upgrades bootload.

stm32 串口通讯使用DMA的例子。使用了ST公司的固件库2.0，mdk-stm32 serial communication using DMA example. Using ST' s Firmware Library 2.0

使用STM32上边的USB模块实现数据的接受和发送，适合IAR与MDK(The use of STM32 above the USB module to achieve data acceptance and transmission, suitable for IAR and MDK)