A RP2040 based debug probe; A USB device that provides a UART serial port and SWD interface. Inspired by the Raspberry Pi Debug Probe I wanted to make my own debug probe as a fun project but implement custom features like a Type-C connector and regular (non JST) connectors while still keeping the original board footprint.

• RP2040 MCU (Duh)
• 16Mbit Flash
• USB-C Connector
• 32mm X 22mm Board Footprint
• USB to UART/SWD Interfaces With Level Shifters
• Uses regular 2.54mm Pitch Headers
• Status LEDs for serial interfaces and power

• Overview
• Quick Start
• Hardware
  • Pinout
  • Schematic
  • PCB
  • Case
  • BOM/Reproduction
• Firmware
• License

1. Hold the button on the board while plugging in the USB-C cable.
2. The board will appear as a mass storage device.
3. Drag and drop the debugprobe.uf2 file from /firmware onto the device.

The RP2040 will reboot, and the status LED should turn green. It’s now ready to use as a USB-to-UART/SWD bridge.

To use it as a USB-to-UART adapter, open the corresponding COM port in your preferred tool and start communicating.

Schematic pdf is available under the /hardware/PCB folder and the project's KiCad files can be found under /hardware/PCB/kicad.

The case files can be found under /hardware/case, It includes the STEP assembly file, and STLs for printing. Use the top.stl and logo.stl if you want to have the logo printed on top, if not use the top_no_logo.stl.

The rough BOM can be found in BOM.md and it assumes you'll assemble the board yourself. The rough cost for just the PCB and parts (excluding shipping) is around $24.

To build one yourself, use the files in /hardware/production to order the PCB and components, or opt for PCBA.

This project uses the Debugprobe firmware. To build one yourself for this board:

1. Clone the debug probe repository, cd into it and update the submodules.

git clone https://github.com/raspberrypi/debugprobe
cd debugprobe
git submodule update --init --recursive
e

2. Open /include/board_debug_probe_config.h and edit the pin definitions to match the board.

3. Make a build directory and cd into it.

 mkdir build
 cd build

4. Run cmake and build the code.

If your environment doesn't contain PICO_SDK_PATH, then either add it to your environment variables with export PICO_SDK_PATH=/path/to/sdk or add -DPICO_SDK_PATH=/path/to/sdk to the arguments to CMake below.

 cmake ..
 make

Once it successfully builds you should have a debugprobe.uf2 file that you can upload to the board.

This project is licensed under the CERN Open Hardware Licence Version 2 Weakly Reciprocal (CERN OHL W)