串口X-modem协议

参考：

https://blog.csdn.net/Whistle0602/article/details/108182286

https://blog.csdn.net/tuyerv/article/details/85811212?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.channel_param

https://blog.csdn.net/wuhenyouyuyouyu/article/details/80414753

介绍X-MODEM协议和Y-MODEM,Z-MODEM的区别

https://blog.csdn.net/u010980705/article/details/53126183