SMT32演示，各个例子全在里面，比如IO口，中断，串口，I2C，SPI等-SMT32 presentation, various examples are all on the inside, such as IO ports, interrupts, serial, I2C, SPI, etc.

iic串口程序，配置,包括hardware ，obj，system，user，usmart文件，STM32专用-include .h file & .c file

linux下ymodem协议下载工具源码，主要功能是配合stm32串口更新固件程序-Ymodem download the source code under the Linux protocol, the main function is to coordinate with the STM32 serial port to update the firmware