Bootloader for Open source video transmitter firmware
OpenVTx firmware can be found from https://github.com/OpenVTx/OpenVTx
See OpenVTx flashing documentation how to connect ST-Link.
See EWRF E7082VM bootloader flash helper for a 3D print to help with initial bootloader flash.
Select Generic_GD32F130_bootloader env and hit upload to flash a bootloader.
Note: This automatically removes protections so no need to use ST-Link Utility anymore. Make sure the red led starts blinking after flashing! If not you might need open ST-Link utility and just apply option bytes. This seems to be a problem with some GD32 MCUs
Next you need to flash OpenVTx firmware:
- Connect VTX to FC.
- Select protocol
VTX (TBS SmartAudio). After the first flash any protocol can be used for future flashing. - Go to https://openvtx.org/, select a Target, then Flash.
Happy flying :)