CHEEKY PI_V1 Bad Guy STM32G431CBU6

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Project IntroductionSTM32G431CBU6
is based on the high-performance ARM® Cortex®-M4F 32-bit RISC core, adopts a 48-pin UFQFN package, and operates at a frequency of up to 170MHz. The MCU embeds high-speed memories (up to 128KB Flash and 32KB SRAM), extensive enhanced I/Os and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix.
The device also embeds several protection mechanisms for the embedded Flash and SRAM: read-out protection, write protection, secure storage area and proprietary code read-out protection
STM32G431CBU6 Specifications:
Core Processor: ARM® Cortex®-M4F
Speed: 170MHz
Connectivity: CANbus, I²C, IrDA, LINbus, SPI, UART/USART
Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
Number of I/Os: 42
Program Memory: 128KB
RAM Size: 32K
Voltage - Supply (Vcc/Vdd): 1.71V ~ 3.6V
Data Converter: A/D 18x12b; D/A 4x12b
Mounting Type: Surface Mount
Package/Case: 48-UFQFN Exposed pad
Supplier device package: 48-UFQFPN (7x7)
 
And the Bad Guy Pi has a variety of protection functions, such as protection against input backflow, ESD and power io overcurrent protection, and also has an on-board debugger and voltage reference source. The existence of these functions will greatly facilitate development work.
 
Function introductionInput
anti-backflow
ESD electrostatic protectionPCB
onboard serial port debuggerSTLINK
-V3 debugger interfaceSWD
debug interfaceBOOT0
switch and reset
button3.3V and 5V power supply IO fuse3.3V is provided by independent dc→dcDoes not affect MCU power
supply3.3V and 5V power supply ioLower left 5V Lower right GND Above GND are 3.3V
full IO leads (including but not limited to UART1 and SWD) 2.5V
voltage reference sourcePower
supply IO independent 3.3VDC→DCThe
 
 
above are all the features and functions of Bad Guy Pie
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Actual photosWelding
 
processDirectly
brush solder on the steel meshDirectly
boil the iron plateDry
repair itTinn
power on testFuck big short circuitDirectly
scrape the bone to heal the wound (the error has been modified in the PCB)
Successfully connected
Why can't I downloadObserve that
the logic level of the WOC serial port is wrong and it is 5V (The error has been modified on the PCB)
I flew the wire and it works now.  
Project origin:
The G431 development boards on Taobao either do not have their own benchmarks and STLINK_V3 interfaces, or are not satisfied with the appearance.
Can you be satisfied with this appearance? And the materials are not very good.
This one is better than the previous one, but there is no C port and no STLINK_V3 interface. And I see that no one has open-sourced the development board for this microcontroller, so I will fill this gap. I am still a newbie, please correct me if you have any questions.