Is it possible to have SD and USB together on the same chip?

[Tung Nguyen]

I have been able to implement individually:

1. SD + FreeRTOS + FATFS + DMA
2. USB + FreeRTOS + FATFS

I want to know how can I make (SD + USB + FreeRTOS + FATFS + DMA) work. Example would be great.

Thank you every much.

[Tesla DeLorean]

In this context what does "USB" do?

Host or Device?

MSC, VCP, HID?

Providing concurrent access to the SD via FATFS and USB-MSC is difficult, consider USB-MTP

[Tung Nguyen]

Hi Clive Two.Zero,

Thanks for the quick response.

USB is in host mode and mass storage class.

Thanks for suggesting USB-MTP, but for now, I want to make SD and USB-MSC work together if possible.

[Tesla DeLorean]

>> I want to make SD and USB-MSC work together if possible.

Pretty sure there examples of that for several STM32 and board combinations.

[Tesla DeLorean]

>>USB is in host mode and mass storage class.

Host mode would suggest you're plugging in a Flash Drive

STM32Cube_FW_F7_V1.12.0\Projects\STM32756G_EVAL\Applications\USB_Device\MSC_Standalone\readme.txt

[Tung Nguyen]

Thank you. Let me read it first and ask more questions in case I don't understand.

[Tung Nguyen]

Hi,

I have been able to mount both the USB and SD successfully. There is one problem, when I write to USB, it actually writes to SD card.

Why does this happen?

Any suggestions would be much appreciate.

Thanks.