Uf2: Decompiler

Decoding the Hardware: A Deep Dive into UF2 Decompilers If you’ve ever played with a Raspberry Pi Pico, Adafruit Feather, or Arduino Nano RP2040, you’ve likely encountered the UF2 (USB Flashing Format) file. Developed by Microsoft, it makes flashing firmware as easy as dragging and dropping a file onto a USB drive.

1. Extract binary from UF2.
2. Auto-detect CPU via Family ID.
3. Spawn Ghidra headless with the -processor flag set.
4. Run the DecompileCallback script.
5. Output the .c file.

• Patch the binary directly (change a constant, bypass a check) with a hex editor.
• Use a bootloader replacement like Picotool to read/write flash, then disassemble in place.

Part 7: Real-World Use Cases for UF2 Decompilation