DFU Firmware lost

[cloud_liu]

Hi,

My MCU is STM32F746ZG. When I want to use DFU to upgrade my board by STM32CubeProgrammer, It show "No DFU detected" in the port list. And I use "zadig" to try install DUF driver, it cannot find any STM DUF device, too.

Do my DFU firmware lost in my MCU? If can I download DFU firmware to program it by ST-Link?

Regards,

Cloud 

[Pavel A.]

>Do my DFU firmware lost in my MCU?

The "system bootloader" implements DFU, it cannot get lost and you don't need to program it.

Just connect the USB pins of the board correctly and use a good USB cable. If the board is not visible on Windows side in the device manager (even as unknown device) - you've failed to connect it correctly. Try again.

[cloud_liu]

My board is openCR(https://emanual.robotis.com/docs/en/parts/controller/opencr10/), it only one usb connector, I download my image by ST-Link, the image can connect by the USB port. Or do I need to pull-high or pull-low GPIO to enter system bootloader?

[Pavel A. · Accepted solution]

Please contact maker of this board (or their community) - they will be glad to help. According to the board image, it has a USB connector. Maybe need to put some jumper etc.

[cloud_liu]

Ok, I will contact the maker, thanks for help.