🚀 Pico NAND Flasher — Professional NAND Flash Programmer for Raspberry Pi Pico

Turn your Raspberry Pi Pico into a powerful, cross‑platform NAND Flash programmer with a modern, user‑friendly GUI.

Highlights

• ✅ Protocol‑level PAUSE / RESUME / CANCEL (GUI ↔ Pico)
• ✅ Real WRITE on Pico with page+spare streaming over UART
• ✅ Modern PyQt6 GUI with toolbar, RU/EN localization, theme switch (System/Light/Dark)
• ✅ Dump Analyzer: Hex view, OOB overlay, bad‑block scan, ECC verify, diff, Markdown report
• ✅ Cross‑platform builds (Windows / macOS / Linux) via GitHub Actions

Hardware at a Glance

• Raspberry Pi Pico (MicroPython firmware)
• NAND flash chip (Samsung / Micron / Hynix / Toshiba / Intel / …)
• 8 × 10 kΩ pull‑ups (I/O0–I/O7 → 3V3), wiring jumpers

Wiring

NAND Pin	Pico GPIO	Purpose
VCC	3V3	Power (3.3V)
GND	GND	Ground
I/O0	GP5	Data 0
I/O1	GP6	Data 1
I/O2	GP7	Data 2
I/O3	GP8	Data 3
I/O4	GP9	Data 4
I/O5	GP10	Data 5
I/O6	GP11	Data 6
I/O7	GP12	Data 7
CLE	GP13	Command Latch Enable
ALE	GP14	Address Latch Enable
CE#	GP15	Chip Enable
RE#	GP16	Read Enable
WE#	GP17	Write Enable
R/B#	GP18	Ready / Busy
WP#	3V3	Write Protect (disabled)

Pro tip: add 10 kΩ pull‑ups between I/O0–I/O7 and 3V3.

Quick Start

1. Flash MicroPython to Pico

# Download latest MicroPython for RP2040 from micropython.org
# Hold BOOTSEL, plug USB, copy .uf2 to RPI-RP2 drive

2. Upload Pico firmware (v2.5)

# Use Thonny → File → Save to MicroPython
main/pico/main.py

3. Install desktop dependencies

pip install -r main/requirements.txt

4. Launch the GUI

python main/gui/main_app.py

The launcher starts the Modern GUI and the Dump Analyzer.

Using the GUI

• Language: Settings → RU/EN
• Theme: Settings → System / Light / Dark (applies instantly)
• Write OOB (spare): enabled by default; toggle in Settings
• Toolbar: quick actions for Refresh / Connect / Disconnect / Read / Write / Erase / About
• After a successful READ you can open the dump in the Analyzer with one click

Releases (Prebuilt Binaries)

• Tagged pushes v* produce artifacts for Windows, macOS and Linux (GitHub Actions)
• Download the latest release and run the launcher executable

Notes on WRITE

• Default mode streams page + spare (OOB). You can disable OOB in Settings.
• The GUI streams data after Pico reports READY_FOR_DATA.
• Progress and power warnings are shown in the GUI.

Troubleshooting

• "Connection Error": check USB cable and MicroPython
• "NAND not detected": verify wiring, pull‑ups, 3.3V supply
• Corrupted data: ensure correct NAND model selection
• Hangs: ensure WP# is tied to 3V3

License

MIT — use it, modify it, share it. 🎉