stm32f769 寄存器配置SD卡---移植fatfs--實現文件讀寫

之前實現了read文件，繼續實現寫功能，添加如下代碼 len = 512;     sta = f_open(&fil,"fatfs.txt",FA_OPEN_ALWAYS | FA_WRITE);      while (sta)         {                 printf("open file error! \n\t error code is %d\n\t",sta);

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