Compiler: IAR Workbench v8.11.3
Middleware’s: FatFs & STM32_USB_Host
Hardware: STM32746G Discovery Board
HAL Version: V1.8.0
Demo Projects: C:\STM32Cube_FW_F7_V1.8.0\Projects\STM32746G-Discovery\Applications\USB_Host\MSC_Standalone AND C:\STM32Cube_FW_F7_V1.8.0\Projects\STM32746G-Discovery\Applications\FatFs\FatFs_uSD
I have merged together the below two STM32Cube_FW_F7_V1.8.0 Discovery Applications into the one project (attached):
1) MSC_Standalone – USB host mass storage class demo project.
2) FatFs_uSD – File system using micro SD card.
My goal is to use the FatFs to open both the USB memory stick and the micro SD card. Then to transfer a .txt file from the USB memory stick to the micro SD card.
All of the functions f_open(), f_read(), f_write() and f_close() will only work on the first storage device (SD or USB) that you use the FATFS_LinkDriver() and f_mount() on. How do you tell the hardware drivers disk_read() and disk_write() which storage device (SD or USB) you intend to use when you call the f_open() function?
If you have already used the FATFS_LinkDriver() and f_mount() function to link the micro SD card, do you then have to use the FATFS_UnLinkDriver() function to unlink the hardware SD drivers before you can then link the USB Host drivers?
I have already set “_VOLUMES 2” in ffconf.h
Please un-zip the attached project into the below directory: