Hello,
on the STM32H7S78-DK board only USB2 (=USB-FS) can be used to connect the board to a PC and flash the firmware via USB-DFU because only PM11 and PM12 are supported by the internal USB-DFU bootloader.
Is there a way to modify the board or to create a custom design with only one USB-C connector with is both connected to USB-FS and USB-HS pins, which can be connected to a PC at startup and shows up as an DFU device when the DFU bootloader is activated at startup but later on acts as an USB-HS host when the application is started?
One idea would be to simply connect both PM2/PM3 of the USB-HS phy and PM11/PM12 of the USB-FS phy together and only enable the PHY needed - either for DFU-bootloader or for the USB-HS host, but it is not clear if this is allowed and will be working.
Background would be to only need one USB-C connector which normally acts as an USB-HS host but could also be use to flash the firmware via an PC by using the DFU bootloader.
Thanks for you help
best regards
rk_iot
