The DAP-Link open source project based on ARM MBED uses STM32F103Cx series microcontrollers, uses Type-C interface, and contains SWD and CDC serial ports. The appearance adopts a public mold solution, and the standard shell can be purchased online.
In terms of firmware, you can directly use the DAP-Link official firmware, or you can use the firmware provided by me below (the difference lies in the indicator light, the official firmware will not flash the COM indicator light during virtual serial port communication).
When burning, first burn the firmware in Firmware/Bootloader. After successful burning, connect to the computer through the Type-C cable. The computer will recognize a USB flash drive, and then copy Firmware/USBIF/*0x8000.hex into it.
The project is designed using Cadence+Allegro16.6.
Figure 1 Schematic diagram
Figure 2 PCB diagram
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