If you want to use SPI communication instead of SDIO on STM32F4xx for any reason, you can do that. To enable SPI communication, open your defines.h file and set constant Now, SPI is activated. Make sure, that you include dependencies libraries, des

在STM32103FZET6跑上系统，用SDIO方式与SD卡通信，有FATFS文件系统。-In STM32103ZET6 ran system, using SPI way SD card communication, there FATFS file system.