Introduction - If you have any usage issues, please Google them yourself
unsigned int i
BYTE buffer[512] // file copy buffer
FATFS fs // Work area (file system object) for logical drive
FIL fsrc // file objects
FRESULT res // FatFs function common result code
UINT br // File R/W count
USART1_Puts("Now, I ll read file i2c/uart.lst .\n")