使用VC++6.0写SD卡读写测试代码，实现SD卡的读写功能-Using VC++6.0 SD card reader to write test code, SD card reader function to achieve

通过VC.net2005编写的上位机通讯软件，通过RS232对下位机的sd卡进行读写、擦除操作。-Written by VC.net2005 PC communications software, through to the next crew RS232 sd card read and write, erase operation.

带文件系统的SD卡操作程序，可以再VC下查看源码-SD card file system with the operating procedures