stm32f7 + freertos +USBFS MSC stack not working

[kqian]

I am starting to use stm32f7 + freertos +USBFS MSC stack in the produce, but never work. I start from CubeMX, and it works if no freeRtos. The file can be written and opened without a problem, but with the FreeRtos, the code always stuck in the file-open();. I trace into the issue and find the code is stuck in fmt = check_fs(fs, bsect) of ff.c file.

Anyone can help me to figure it out? Thanks a lot for that.