基于VC和串口管道变形监测，完整的功能，通过单片机将数据存入SD卡，在上位机上读取，绘制波形-Deformation monitoring based on VC and serial pipeline, complete function, data will be stored in the SD card through the microcontroller, read on the PC, rendering waveform

VC++下计算和校验CRC16(请留意相关注释),计算CRC7(for SD card),Calculation and check VC++ under CRC16 (Please note the related notes), to calculate CRC7 (for SD card)