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Nucleo-H743ZI: Problems setting USB-FS-Device into operation

Question asked by Torsten Aurich on Nov 15, 2017
Latest reply on Nov 29, 2017 by Andrew Ivanov

Hello Community,


currently i'm starting development with Nucleo-H743ZI. I'm using STM32CubeMX V4.22.1 and
Atollic True Studio V8.0.0 on Win10.
I'm creating a new CubeMX project. Under Board Selector i'm selecting the Nucleo144
NUCLEO-H743ZI as target.


1. First i fixed pinning in the Pinout Tab.
Under USB_OTG_FS i do the following settings:
- Mode: Device Only
- Activate_VBUS: VBUS sensing
- Activate SOF: Yes
Under SYS:
- Debug: Trace Asynchronous SW
Under RCC:
- HSE: Crystal/Ceramic Resonator
- LSE: Crystal/Ceramic Resonator
Under MiddleWares:
- Class for FS IP: CDC (VCP)


2. Second i go to Clock Configuration:
- Setting HSE Input Frequency to 8MHz
- PLL Source Mux: PLL source is HSE
- PLL1: DIVM1=4; DIVN1=400; DIVP1=2
- System Clock Mux: switch to PLLCLK (on SYSCLK appears 400MHz)
- Prescaler for core/peripherals: D1CPRE=1; D1HPRE=2; HPRE=2; D1PPRE=2; D2PPRE1=2; D2PPRE2=2; D3PPRE=2
- PLL3: DIVM3 = 4; DIVN3 = 192; DIVQ=8 (right to DIVQ3 48MHz appears)
- USB Clock Mux: select PLL3Q (on clock to USB 48MHz appears)


3. Go to the Configuration Tab:
A. Under Connectivity switch to USB_FS to open dialog:
I'm using the following Parameter Settings:
- Speed: FS 12MBit/s
- EP0 Max Packet size: 64Bytes
- internal IP DMA: Disable
- Low Power: Disable
- Battery Charging: Disable
- Link Power Management: Disable
- Use dedicated EP0 interrupt: Disable
- VBUS sensing: Enabled
- Signal start of frame: Enabled
NVIC Settings:
- USB OTG FS EP1 OUT Global Interrupt: Disable
- USB OTG FS EP1 In Global Interrupt: Disable
- USB OTG FS Global Interrupt: Enabled (by default)
GPIO Settings:
- leave unchanged
B. Under System BDMA:
- leave unchanged
C. Under System CORTEX_M7:
- CPU ICache: Enabled
- CPU DCache: Enabled
D. Under System DMA:
- leave unchanged
E. Under System GPIO:
- leave unchanged
F. Under System MDMA:
- leave unchanged
G. Under System NVIC:
- leave unchanged
H. Under System RCC:
- leave unchanged except of:
- Flash Latency(WS): 7 WS (8 CPU cycles)
I. Under Middleware USB_DEVICE:
Parameter Settings:
- USBD_DEBUG_LEVEL: 0: No debug messages
- USB CDC Rx Buffer Size: 2048Bytes
- USB CDC Tx Buffer Size: 2048Bytes
Device Descriptor FS:
- PID: 22336
- PRODUCT_STRING: STM32 Virtual ComPort


4. Go to CubeMX Project Tab, change Project Settings:
In Tab Project:
- Project Name: select a project name
- Project Location: set Path to Project
- Under Firmware Package Name and Version appears: "STM32Cube FW_H7 V1.1.0"
Tab Code Generator:
- leave all unchanged
Tab Advanced Settings:
- leave all unchanged


5. Go to CubeMX Project Tab: Press Generate Code...


6. Switch to AtollicTrue Studio:
- Import Project
- Compile Project
- Select Tab RUN->Debug (Debugger starts)
- Run the project...


7. Open Windows Device Manager Tree:
Looking under communications (COM&LPT) and waiting to a new STMicro VCP appears...
Nothing happens!!! No new connection (USB/VCP) appears...


To find the problem i try the following:
1. Check PLL: route SYSCLK to MCO2, use Oszi to verify: i can verify a square wave signal
on the Oszi with same frequency as displayed in CubeMX clock configuration tool MCO2 info box.
2. Check the USB cabels: I change the USB cable. Same effect. Nothing appears in Windows Device Manager.
3. I use Win10 (Maybe the Problem???): Change to a Windows 7 Laptop. Plug the flashed Nucleo in
the USB ports (STLink for Powering, 2nd Micro-USB to H7-USB-FS-Port). Same effect.
Nothing appears in Windows Device Manager.


So now i decided to change the platform:
1. Go back to Win10. Take a Nucleo-F767ZI. Create a CubeMX Project. Do the same steps as above but parameters
slightly adapted to F767. Use FW package "STM32Cube FW_F7 V1.8.0" and create an Atollic True Studio Project.
Plug the board onto the USB ports.
Import the project in Atollic True Studio.
Compile and run.
And SUCCESS: A new serial port appears in the Windows Device Manager (named USB Serial Device).


So now i ask myself, what is the problem with the H743-Nucleo?
I think cables are not the problem. The Micro-USB port connectors on both Nucleos seems to be the same.
Also not Win10 (because F767 works).
I have studied the STM32H743xI errata too but found nothing that could cause the problem.


Maybe there is somebody out there, who can advice me? Any remarks?




Update: I found what i'm looking for and solve the problem...