How to troubleshoot USB mass storage device (STM32F4)?

[Ivan Voras]

Posted on March 04, 2017 at 22:03

I'm new to STM32, I've set up Eclipse with the OpenSTM32 plugin, STM32CubeMX and can upload and run simple 'blink' programs to

http://www.ebay.com/itm/Core407V-STM32F407VET6-STM32-Cortex-M4-Development-Board-Mainboard-Module-Kit-/252522219941

 (

http://forum.cxem.net/applications/core/interface/file/attachment.php?id=451874

). Now, I'm trying to create a simple USB mass storage device with it, and when the board is connected to the computer (running Windows 10), there's an error message saying 'device descriptor request failed.'

I believe my USB clock is ok at 48 MHz, the board appears to have a 8 MHz crystal.

I've attached the STM32CubeMX report PDF.

Any advice on what could have gone wrong? How do I even approach debugging this?

#mass-storage #usb

[Ivan Voras]

Posted on March 04, 2017 at 22:43

Replying to myself because I've found the problem. I only configured USB_OTG_FS in STM32CubeMX to Device-only mode, and left USB_OTG_HS Disabled. I've since changed USB_OTG_HS to 'Internal FS Phy: Device_Only', and USB_DEVICE class for HS IP to 'Mass Storage Class' (the same as for FS IP), and now it appears to be working. More testing is pending...

[Imen.D]

Posted on March 27, 2017 at 18:00

Hi,

I recommend that you have a look to the MSC_Standalone example in STM32CubeF4 firmware package which describes how to use USB device application based on the Mass Storage Class (MSC) on the STM32F4xx devices: STM32Cube_FW_F4_V1.15.0\Projects\STM324xG_EVAL\Applications\USB_Device\MSC_Standalone.

and I hope this

https://community.st.com/0D50X00009XkeGNSAZ

helps you.

Imen