The UM232H is a USB-to-serial/FIFO development module in the FTDI product range which utilizes the FT232H USB Hi-Speed (480Mb/s) single-port bridge chip to handle the USB signaling and protocols. Official reference can be found here
You can configure debugging tool using debug_tool option in “platformio.ini” (Project Configuration File):
[env:myenv]
platform = ...
board = ...
debug_tool = um232h
If you would like to use this tool for firmware uploading, please change upload protocol:
[env:myenv]
platform = ...
board = ...
debug_tool = um232h
upload_protocol = um232h
More options:
macOS contains default FTDIUSBSerialDriver driver which conflicts with debug tools which are based on this chip. FTDI Chip company recommends removing this default driver from a system. Everything should work after system rebooting. See detailed instruction in official application note (Page 16, Section 4: Uninstalling FTDI Drivers on OS X) AN134: FTDI Drivers Installation guide for MAC OS X
Please install “udev” rules 99-platformio-udev.rules. If you already installed them before, please check that your rules are up-to-date or repeat steps.
Please read 4. UM232H Pin Out and Signal Descriptions section for details.
UM232H Pin  | 
Board JTAG Pin  | 
Description  | 
|---|---|---|
GND  | 
GND  | 
Digital ground  | 
AD0  | 
TCK  | 
JTAG Return Test Clock  | 
AD1  | 
TDI  | 
Test Data In  | 
AD2  | 
TDO  | 
Test Data Out  | 
AD3  | 
TMS  | 
Test Mode State  | 
You will also need to connect VIO to V3V and USB to 5V0 of UM232H to power the FTDI chip and board. See UM232H Datasheet
Name  | 
Description  | 
|---|---|
The GigaDevice GD32V device is a 32-bit general-purpose microcontroller based on the RISC-V core with an impressive balance of processing power, reduced power consumption and peripheral set.  | 
Name  | 
Description  | 
|---|---|
Arduino Wiring-based Framework allows writing cross-platform software to control devices attached to a wide range of Arduino boards to create all kinds of creative coding, interactive objects, spaces or physical experiences  | 
|
GigaDevice GD32VF103 Firmware Library (SDK) is a firmware function package, including programs, data structures and macro definitions, all the performance features of peripherals of GD32VF103 devices are involved in the package  | 
Note
For more detailed board information please scroll tables below by horizontal.
Name  | 
Platform  | 
Debug  | 
MCU  | 
Frequency  | 
Flash  | 
RAM  | 
|---|---|---|---|---|---|---|
External  | 
GD32VF103VBT6  | 
108MHz  | 
128KB  | 
32KB  | 
||
External  | 
GD32VF103CBT6  | 
108MHz  | 
128KB  | 
32KB  | 
||
External  | 
GD32VF103C8T6  | 
108MHz  | 
64KB  | 
20KB  | 
||
External  | 
GD32VF103CBT6  | 
108MHz  | 
128KB  | 
32KB  |