说明：  此程序是RFID中使用的一种CRC16校验原理，采用了移位法，查表法做好后再上传。此外，下载解压后要把文件后缀名改为.c ！
(This procedure is the use of RFID as a CRC16 checksum principle, the use of the displacement method, look-up table method to do a good job and then upload. In addition, the downloaded file to extract the suffix after the name change. C!)