STM32F407 board not show in Window 10

[jcc147]

I compiled micropython with BOARD=STM32F4DISC and then uploaded the firmware.dfu to a third party STM32F407VG board.
For some reason, after the board usb was plugged to PC, Windows 10 show nothing for this board in either Device Manage or File Explore.
FS_VBUS detect in the mpconfigboard.h was commented out when compiling because this third party board A9 is not connected to usb connector.
Did I miss anything?

Can someone help me out? Appreciate in advance.

Josh

[dhylands]

From: https://github.com/micropython/micropyt ... -Discovery

Plug in the discovery board. To use DFU, you need to connect CN5 (the micro-USB connector on the bottom of the board) into your PC. Unfortunately, the CN5 connector doesn't power the board, so you can either connect CN1 (mini-USB connector at the top of the board), or run a jumper wire from PA9 to 5V (PA9 connects to VBUS on CN5) in order to power the board. CN1 connects to the STM32F103 chip near the mini connector in order to support stlink. CN5 connects to the STM32F407 chip.

You need to add a jumper from PA9 to 5V and use the micro USB connector (CN5)