OpenSpaceCode is an engineering-focused colaborative initiative for developing reusable software components and reference implementations for small-scale (academic) space applications.

Our objective is to deliver reliable, standards-aligned building blocks that can be adopted by students, student organizations, and technical teams for educational purposes and mission development activities.

• Implement practical software aligned with CCSDS and ECSS standards
• Provide understandable, extensible baseline solutions for mission-specific adaptation
• Support education-oriented use with engineering-grade quality expectations

• CCSDS SpacePacket protocol implementation in C
• CCSDS SpaceWire protocol implementation in C
• CCSDS TC/TM SDLP protocol implementation in C
• ECSS-E-ST-70-41C Telemetry and Telecommand Packet Utilisation Standard (TM/TC PUS)
• Desktop EGSE (Electrical Ground Support Equipment) for TC transmission, TM reception, monitoring, and operational control on ground
• Time system (CCSDS CUC / CDS time)

• CCSDS File Delivery Protocol (CFDP)
• Python terminal with CCSDS protocols support for rapid development & debugging
• OBC framework (mini flight software)
• FDIR (Fault Detection, Isolation and Recovery)

Contributions are welcome, including new standard implementations, functional extensions, validation improvements, and documentation enhancements.

The project prioritizes correctness, clarity, maintainability, and practical usability in mission-oriented contexts.

flowchart LR
    subgraph GROUND["Ground Segment"]
        direction TB
        EGSE["<b>EGSE</b><br/>TC transmission · TM reception<br/>monitoring · operational control"]
        PYT["<b>Python Terminal</b><br/><i>(planned)</i> rapid development<br/>& debugging"]
        PUSG["<b>PUS</b><br/>TM/TC service layer"]
        SPPG["<b>SpacePacket</b>"]
        SDLPG["<b>TC/TM SDLP</b>"]
        EGSE <--> PUSG
        PYT <--> PUSG
        PUSG <--> SPPG
        SPPG <--> SDLPG
    end

    subgraph SC["Space Segment"]
        direction TB
        OBC["<b>OBC Framework</b><br/><i>(planned)</i> mini flight software"]
        FDIR["<b>FDIR</b><br/><i>(planned)</i>"]
        PUSS["<b>PUS</b><br/>service handlers"]
        CFDP["<b>CFDP</b><br/><i>(planned)</i> file delivery"]
        SPPS["<b>SpacePacket</b>"]
        SDLPS["<b>TC/TM SDLP</b>"]
        SPW["<b>SpaceWire</b>"]
        SDLPS <--> SPPS
        SPPS <--> PUSS
        SPPS <--> CFDP
        PUSS <--> OBC
        OBC --- FDIR
        OBC <--> SPW
    end

    DEV["Payloads /<br/>subsystem devices"]
    TIME["<b>Time System</b><br/>CCSDS CUC / CDS"]

    SDLPG <-->|"space link<br/>TC ↑ · TM ↓"| SDLPS
    SPW <--> DEV
    TIME -.- EGSE
    TIME -.- OBC

    classDef planned stroke-dasharray: 6 4;
    class OBC,FDIR,CFDP,PYT planned;