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bf32b28266
- Standardize .gitignore to match ecosystem template - Fix README: remove stale Radioschematic ref, fix 10V→12V, remove generic sections - Replace LICENSE stub with full CERN-OHL-S-2.0 text - Remove production/ from git tracking (generated, re-exportable) - Untrack generated files: OpenFC.net, replicate_layout.log, ibom, old render Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
92 lines
2.9 KiB
Markdown
92 lines
2.9 KiB
Markdown
# OpenFC
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Open-source Betaflight flight controller with integrated break-off ELRS receiver, based on the RP2354B microcontroller.
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<p>
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<img src="images/OpenFC_Front.png" width="400" alt="OpenFC Front" />
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<img src="images/OpenFC_Back.png" width="400" alt="OpenFC Back" />
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</p>
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## Features
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### Microcontroller
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- **RP2354B** - Raspberry Pi dual-core ARM Cortex-M33 @ 150MHz (with integrated flash)
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### Integrated ELRS Receiver (Break-off)
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- On-board 2.4GHz ExpressLRS receiver module
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- Break-off design allows for different placement if needed
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### Sensors
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- **IMU**: LSM6DSV16XTR
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- **Barometer**: BMP388
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### Blackbox Data Logging
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- **BY25Q128ASWIG** - 128Mbit (16MB)
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### Motor Outputs
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- 4x PWM/DShot motor outputs
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### Analog OSD on PIO
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Hardware implementation of opamp and mux to detect syncs and select between white and black pixels. Needs software implementation still.
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### Connectivity
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- **USB-C** - Configuration and firmware flashing
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- **UART0** - Serial RX/TX (ELRS connection pads)
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- **UART1** - Spare serial port
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- **PIO UART** - Software UART via RP2350 PIO (2x)
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- **I2C** - External sensor expansion
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- **SPI** - IMU and Blackbox on isolated bus.
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### Analog Inputs
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- Current sensor input (ADC)
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- RSSI input (ADC)
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- 1 external available ADC input
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### Additional Features
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- Addressable LED strip output (WS2812/NeoPixel)
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- Buzzer output
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- 16 LED's built in on corners
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- ELRS ESP flashable by the RP2354B (BOOT/EN pins connected)
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### Power
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- 2S-6S batteries
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- 12V and 5V regulated outputs, 12V is switchable
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## Repository Structure
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```
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OpenFC/
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├── README.md
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├── hardware/ ← KiCad project, libraries, and production files
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│ ├── OpenFC.kicad_pro
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│ ├── *.kicad_sch ← Hierarchical schematics
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│ ├── OpenFC.kicad_pcb
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│ ├── lib.kicad_sym ← Custom symbol library
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│ ├── lib.pretty/ ← Custom footprint library
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│ ├── lib.3dshapes/ ← 3D models
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│ └── tools/ ← Analysis scripts
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└── images/ ← Board renders
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```
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All symbol, footprint, and 3D model libraries are included in the repository — no external library setup required.
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## Schematic Hierarchy
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- `OpenFC.kicad_sch` - Top-level schematic
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- `rp2350a.kicad_sch` - RP2354B microcontroller and supporting circuitry
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- `elrs.kicad_sch` - ELRS 2.4GHz receiver module (break-off section)
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- `power.kicad_sch` - Power supply and regulation
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- `imu.kicad_sch` - LSM6DSV16XTR IMU
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- `baro.kicad_sch` - BMP388 barometer
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- `compass.kicad_sch` - LIS3MDLTR magnetometer (not populated, but there's space for it)
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- `blackbox.kicad_sch` - BY25Q128 flash memory
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- `leds.kicad_sch` - Status LEDs
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- `osd.kicad_sch` - OSD circuitry
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- `connectors.kicad_sch` - External connectors
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- `pads.kicad_sch` - Solder pads and test points
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## License
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Licensed under [CERN-OHL-S-2.0](https://ohwr.org/cern_ohl_s_v2.txt). See [LICENSE](LICENSE) for details.
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