sdconfig.h: The document for the SD card reader module configuration header file...

代码说明：

sdconfig.h: 该文件为SD卡读写模块配置头文件，用户可根据实际硬件条件进行修改. SD目录 : SD卡读写模块的全部文件,一般不用修改. 建议sdconfig.h文件不要放于SD目录中，因为SD目录中的文件一般无须修改,而sdconfig.h通常会有改动. -sdconfig.h: The document for the SD card reader module configuration header files, the user hardware according to actual conditions can be modified. SD directory: SD card reader module all the documents, the general need not be amended. sdconfig.h document recommends not to put in SD directory, because the SD files in the directory are not normally required to be amended and the changes are usually sdconfig.h.