STM32CubeProgrammer cannot connect to system bootloader over direct USB, but works over USB-hub
We faced that issue on a couple of diffeent PCs working under Windows 7/10 x64.
We experience this for some (not all) STM32H7xx and STM32F7xx MCUs.
Trying to connect to system bootloader over USB directly connected to PC we often see something like this:
14:48:19 : STM32CubeProgrammer API v2.8.0
14:48:44 : USB speed : Full Speed (12MBit/s)
14:48:44 : Manuf. ID : STMicroelectronics
14:48:44 : Product ID : STM32 BOOTLOADER
14:48:44 : SN : 00000008FFFF
14:48:44 : FW version : 0x011a
14:48:44 : Device ID : 0x0449
14:48:44 : UPLOADING OPTION BYTES DATA ...
14:48:44 : Bank : 0x00
14:48:44 : Address : 0x1fff0000
14:48:44 : Size : 44 Bytes
14:48:44 : Error: Uploading Option Bytes bank: 0 failed
14:48:44 : Error: Initializing the Option Bytes failed
i.e. USB connection exists but some error occurres during read Option Bytes memory.
When we connect USB cable over USB hub - no problems occures:
15:00:57 : USB speed : Full Speed (12MBit/s)
15:00:57 : Manuf. ID : STMicroelectronics
15:00:57 : Product ID : STM32 BOOTLOADER
15:00:57 : SN : 00000008FFFF
15:00:57 : FW version : 0x011a
15:00:57 : Device ID : 0x0449
15:00:58 : UPLOADING OPTION BYTES DATA ...
15:00:58 : Bank : 0x00
15:00:58 : Address : 0x1fff0000
15:00:58 : Size : 44 Bytes
15:00:58 : UPLOADING ...
15:00:58 : Size : 1024 Bytes
15:00:58 : Address : 0x8000000
15:00:58 : Read progress:
15:00:58 : Data read successfully
No matter what version of Cube Programmer we use, 2.7-2.9. Looks very much like STM USB driver bug.
Has anyone faced something like this?