USB shows up as an "Unknown device (port Reset Failed)"

[GHugh.11]

I am trying to get the STM32F722 to interface with the USB3300 external HS PHY (ULPI). 

I have generated code from the cube. 

I been doing digging.. 

the "USBD_CDC_Init" function never get called and pClassData is always NULL.  

I have tried changing the HEAP and STACK sizes. (to 0x1000, 0x800 base on reading the forums)

Hardware seems to be correct: clocks, voltages 3.3v & 1.8v, etc

I tried different USB cables also base on reading the forums.

Need advice what to check next...?

Thanks

Greg

STM32F22RC

TrueStudio 9.3

STM32CubeMX 5.3

Cube package: STM32F7 v1.15.0

[JYeh.9]

Hi

Did you managed to solve this problem?

I am now trying to solve the same issue.

Any suggestion is highly welcomed.