成功移植了contiki操作系统的代码，编译在keil5下编译生成HEX文件下载到STM32即可实现LED闪烁与串口打印功能。(The code of Contiki operation system is successfully transplanted, compiled and compiled under keil5, and HEX files are downloaded to STM32 to achieve LED scintillation and serial port p