Develop content
The development of time synchronization and deterministic scheduling can be used as an independent work package in the transformation of the whole machine, subsystem or existing equipment. Confirm the target product, development stage, applicable requirements and upstream and downstream responsibilities before implementation, and do not describe general engineering activities as having obtained airworthiness, type or mission approval.
Target platform and real-time requirements
Confirm the target product, development stage, input data, applicable rules, upstream and downstream interfaces and acceptance responsibilities for time synchronization and deterministic scheduling development.
Low-level drivers and protocols
Connect to PPS, PTP, IRIG-B or specified clock to develop time source management, timestamp, synchronization status, drift monitoring and task scheduling.
State machine and fault handling
Record end-to-end error and jitter.
Target board verification and build delivery
Fixed versions, environments, tools and test data, delivery time synchronization and deterministic scheduling of development results, usage instructions, verification records and known limitations.
Implementation and Data Process
Platform and tool chain → BSP/driver/protocol → real-time tasks and time → self-test and exception recovery → target board regression → version release.
Requirements, design, implementation, testing and issue records use traceable versions. When involving third-party platforms, devices, models, IP or tools, first check interface openness, licensing and deliverable scope.
Project input
- Processor, board, RTOS/system and toolchain versions.
- Registers, buses, protocols, ICDs and time sources.
- Task cycles, resources, startup, self-test and recovery requirements.
- Target hardware, emulator, test cases and source code scope.
- Current issue, steps to reproduce, history, and results of completed reviews or tests.
- Expected code, designs, models, tools, prototypes, reporting and maintenance coverage.
Delivery and acceptance
| Delivery content | Verification method |
|---|---|
| Work scope, input and interface baselines | Check product levels, versions, dependencies, exclusions and acceptance responsibilities applicable to time synchronization and deterministic scheduling development. |
| Project results within the agreed scope | Reproduce results as built or designed, and execute representative use cases on target hardware, software, or simulation environments. |
| Test, review or analyze records | Document tools, equipment, data, environment, procedures, decisions and problem status, retaining original evidence. |
| Configuration, delivery and known limitations | Check file versions, hashes, third-party licenses, open issues, and subsequent change processes. |
Test results apply only to the device, version, data and environment recorded. Environmental testing, certification reviews, on-site verification, or third-party approvals that have not been performed should be clearly marked as being outside the scope of this phase.
FAQ
Is the development of time synchronization and deterministic scheduling equivalent to passing relevant certifications or reviews?+
Not equivalent. The service can organize plans, processes and evidence according to target standards, but the final applicability, compliance and approval conclusions are confirmed by the model responsible unit, the validator or the authority.
Can time synchronization and deterministic scheduling development be integrated into existing projects?+
It can be evaluated after obtaining the target version, source code or design information, interface documentation, tool chain and necessary authorization. If the data is incomplete, you can first establish a minimum verification environment and gap list, and then confirm the scope of modification.
How to accept the development of time synchronization and deterministic scheduling?+
The acceptance response responds to the confirmed requirements, interfaces, and verification matrix, and records versions, environments, inputs, steps, expected results, measured results, and problem status. Merely providing demonstration screenshots or verbal explanations cannot substitute for evidence of an agreement.
How to evaluate cost and cycle time for time synchronization and deterministic scheduling development?+
Estimates are staged based on target level, existing infrastructure, number of interfaces and tools, depth of verification, third-party dependencies, and review rounds. Unrecognized material, laboratory, site and licensing fees are itemized separately.
Service and Acceptance Instructions
This page describes the scope of engineering services that can be discussed and does not constitute a commitment to fixed performance, cycle time, price, certification, approval, flight, launch, on-orbit, or business results; the final scope is subject to the target system, input data, applicable requirements, and technical and commercial documents confirmed by both parties.
Testing and verification supporting development
The following tasks can be split according to equipment, interface and sample conditions. The specific output and acceptance methods are confirmed in the project scope.
PTPTime synchronization endpoint deviation measurement tool
Development and delivery：Record endpoint deviation, network load and master switching transients
Project input：Customer-supplied oscilloscope/bit error meter/time-frequency reference, fixture and authorized analysis software
Acceptance method：Independent hardware time reference review, mutual verification cannot be performed with software timestamps from the same source.
FAQ
PTPTime synchronization endpoint deviation measurement tool：What input conditions are required for this task?
Customer-supplied oscilloscope/bit error meter/time-frequency reference, fixture and authorized analysis software
PTPTime synchronization endpoint deviation measurement tool：How to accept this task?
Independent hardware time reference review, mutual verification cannot be performed with software timestamps from the same source.
PTPTime synchronization endpoint deviation measurement tool：Can I delegate only the instrument interface or test software?
The scope can cover an individual instrument driver, acquisition, process control, data calculation or user-interface module. Complete equipment integration requires separate agreement on mechanical, electrical, method and site responsibilities.
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