STM32F103 development board-onboard stlink

The pin sequence is compatible with the common 40P core boards on the market and has been verified by Jialichuang SMT. Please see the attachment for related firmware
 
Progress:
2022.12.02 V1.0 First draft, schematic verification completed
2023.01.02 V1.1 Silk screen modified, board tested Introduction to the normal working
project of stlink and C8T6
In most cases during the process of learning STM32, a programmer is required and needs to be carried with you. If you use the usb-ttl download method, you need to repeatedly plug and unplug the boot pin, which is also very inconvenient. This project refers to the self-made ST-LINK V2-1, which has onboard Stlink and has (STM32 debugging interface, large-capacity storage interface, virtual COM port )Function.
Note: BOOT0 must be short-circuited (grounded) when burning firmware to stkink on the board. The programming port is 1.27mm-4P, and a programming probe can be used for programming.
Features:
Reserved RTC clock battery;
can be downloaded and simulated through Stlink firmware/Daplink firmware;
fully compatible with traditional STM32F103C8T6 core board packaging and pin definitions.
 
Port configuration and description
Stlink part is defined as follows, using four-wire SW debugging mode, virtual serial port Corresponding to USART1, the status indicator light (Link) is retained.
 
ST-Link V2.1 Firmware Burning & Firmware Update
Since the boss has already given the detailed burning process, I won’t go into details here.
1. Obtain the firmware
and burn the lower version firmware first. Attachment uploaded.
2. Burn the firmware
through the STM32CubeProg software and burn the hex file through the 4p burning port. (A 9.9 ST-Link v2 is required)
3. Update the firmware
and open the ST-LINK Utility.rar compressed package, open ST-LinkUpgrade, and click device connect. If the following interface appears, the connection is successful. Then select the STM32+MSD+VCR version to upgrade.
 
Project pictures
1. Front view-TOP
2. Bottom view-BOTTOM
3. Demonstration video