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SD card FATFS and USB Mass Storage Device

Question asked by Krishna.Vamshi on Apr 3, 2017
Latest reply on Oct 20, 2017 by Andrew Hazelton

Hi All,


I want to create a project which can access the SD card with File System, When i want to connect the device to PC it should act as a Mass storage device.


So i did experiments on SD FATFS and USB Mass storage Device, both are working separately but i want to combine both in single project. So is there any example for this type of projects?


SD is able to mount on PC as a Mass storage device when i am not doing any operations with FatFS. If i  do read or write with FatFS, the device is not mounting on the PC.

Here i am using the STM32L476G_Eval board.

can any body please point me to the correct way of doing both in single project.