STM32 Data Serialization & Telemetry Project

An embedded project for STM32 implementing bit-packed data serialization, telemetry transmission, and high-speed UART-SPI communication.

Key Features

• Efficient bit packing (4x 10-bit values into 5 bytes)
• Hardware acceleration: DMA for UART, STM32 hardware CRC
• Flexible configuration via Config.h
• Two operational modes:
  • Telemetry: periodic UART data transmission
  • HighSpeedLink: UART reception → SPI transmission → response processing
• Debug support:
  • Hex data dumps
  • USART2 logging (debug builds only)

Technology Stack

• Language: C++17
• Hardware: STM32F103RB (Nucleo board)
• Framework: libopencm3
• Tools: PlatformIO
• Algorithms:
  • Bit packing (custom implementation + Antoine Beauchamp's BitReader)
  • CRC-8 (hardware and software implementations)

Project Structure

src/
├── Config.h             # User configuration
├── Device/              # Peripheral drivers
│   ├── Blinker.h        # LED control
│   ├── HardwareUART.h   # DMA-enabled UART
│   └── ...              
├── Node/
│   ├── TelemetryUnit.h  # Telemetry module
│   └── HighSpeedLink.h  # UART↔SPI bridge
├── Serialization/       # Bit packers and hashers
└── Tool/                # Utility classes

Getting Started

1. Install PlatformIO
2. Clone the repository:

   git clone https://github.com/your-repo.git
   cd your-repo

3. Build and upload:

   pio run -t upload

4. For debugging:

   pio run -e debug -t upload

Workflow Example

1. TelemetryUnit sends data (compile time + timer):

   [UART] 34 12 05 00 00 A1 (packed data + CRC)
   

2. HighSpeedLink receives it, transmits via SPI and outputs:

   [SPI] 34 12 05 00 00 A1
   Deserialized: 10:20:30
   

Contributing

PRs and questions are welcome! No strict requirements for contributors.

Acknowledgments

• PlatformIO for the build system
• STMicroelectronics for STM32 and libopencm3
• Antoine Beauchamp for BitReader
• Open-source community for inspiration

License

Project is MIT licensed. See LICENSE for details.