Audio Engine

Neutron HiFi™ Audio Engine | The digital heart of Neutron Player & Recorder: Neutron Music Player and Neutron Audio Recorder applications are driven by the in-house developed, mature and highly sophisticated Neutron HiFi™ Audio Engine. Neutron HiFi™ Audio Engine can also be used for games, simulation and other software that requires high-resolution audio functionality.

Real-Time OS (RTOS)

SuperTinyKernel™ (STK): Minimalistic, high-performance, deterministic, bare-metal C++ RTOS for resource-constrained embedded systems with ARM Cortex-M, RISC-V MCUs:

• Soft and Hard Real-Time (HRT) support: STK supports preemptive scheduling for “soft real-time” tasks, you can also enable hard real-time mode (KERNEL_HRT) for periodic tasks with guaranteed deadlines.
• Static and dynamic tasks: Define all tasks at startup (KERNEL_STATIC) or allow tasks to be created and destroyed at runtime (KERNEL_DYNAMIC)
• Scheduling strategies: Round-Robin (RR), Fixed-Priority (FP, similar to FreeRTOS), Smooth Weighted Round-Robin (SWRR), Rate-Monotonic (RM), Deadline-Monotonic (DM), including Worst Case Reaction Time (WCRT) analysis, Earliest Deadline First (EDF), custom (via ITaskSwitchStrategy).
• Synchronization API: CriticalSection, SpinLock, Mutex, Event, ConditionVariable, Semaphore, Pipe primitives for inter-task, inter-core synchronization. Synchronization is optional via KERNEL_SYNC kernel mode.
• Low-power friendliness: STK puts MCU into a low-power mode when there are no runnable tasks (task calls Sleep).
• Tiny footprint: Minimal C++ abstractions (no STL, no heavy namespaces) keep the kernel small and simple.
• Safety-critical systems ready: No dynamic heap memory allocation (satisfies MISRA C++:2008 Rule 18-4-1).
• Portability: Supports ARM Cortex-M and RISC-V RV32 MCUs.
• Extensibility: C++ interfaces allow easy extensibility of STK, e.g. custom scheduling strategy.
• Multi-core support: Fully implemented for Cortex-M and RISC-V.
• C++ and C API: Can be used easily in C++ and C projects.
• Traceability: Supports tracing of tasks scheduling with a SEGGER SystemView.
• x86 development mode: Compile & debug your code on a PC before flashing to the MCU, which helps with early testing and unit tests.
• 100% test coverage: Every source-code line of scheduler logic is covered by unit tests.
• QEMU test coverage: All repository commits are automatically covered by unit tests executed on QEMU for Cortex-M0 and M4.
• Open-source License - MIT: Open and completely free for commercial, educational, closed-source, open-source projects.

• Warranty of Title: Full intellectual property (IP) indemnification and provenance guarantees required by corporate legal departments.
• Safety-Critical Compliance: Expert assistance in achieving IEC 61508 (Industrial), IEC 62304 (Medical), ISO 26262 (Automotive), or DO-178C (Aerospace) certification for STK-based systems.
• Custom Licensing: Tailored Enterprise License Agreements (ELA) for organizations with strict open-source procurement policies.
• Audit & Due Diligence: Code audit and licensing assessment to satisfy corporate or regulatory requirements.

• Architecture Porting: Custom development for specialized ARM, RISC-V, or other architectures, including embedded SoCs and microcontrollers.
• Real-Time Performance Tuning: Hard real-time optimization, latency profiling, and jitter reduction for mission-critical applications.
• Custom Driver & Peripheral Integration: STK integration with complex peripherals (High-Speed USB, I2S/TDM audio, networking stacks, DMA engines, etc.).

• SLA-Backed Support: Guaranteed response times for technical inquiries and critical bug fixes, with priority escalation paths.
• Architectural Consulting: Deep-dive code reviews, system design guidance, and reliability analysis for your firmware.
• Long-Term Maintenance Contracts: Versioned updates, patch management, and minor feature requests for commercial products.
• Training & Knowledge Transfer: Remote workshops, RTOS best practices, and team training for engineers working with STK.

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