c语言实现的串口模块，全功能提供；包含读写、设置等复杂情况，亲测可用。-c language serial module, provides full-function comprising read and write, set up complex cases, pro-test available.

crc校验，c语言实现，亲测可以使用，可以放心下载-crc check, c language, pro-test can be used, you can rest assured download