Improvement:Update the timeslave to comply to SCORE conventions and add full-chain demo

docs/features/index.rst

@@ -0,0 +1,25 @@
+..
+   # *******************************************************************************
+   # Copyright (c) 2024 Contributors to the Eclipse Foundation
+   #
+   # See the NOTICE file(s) distributed with this work for additional
+   # information regarding copyright ownership.
+   #
+   # This program and the accompanying materials are made available under the
+   # terms of the Apache License Version 2.0 which is available at
+   # https://www.apache.org/licenses/LICENSE-2.0
+   #
+   # SPDX-License-Identifier: Apache-2.0
+   # *******************************************************************************
+
+Features
+========
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Features:
+
+   time_daemon/index
+   time_slave/index
+   requirements
+   test_cases

docs/features/requirements.rst

@@ -0,0 +1,150 @@
+..
+   # *******************************************************************************
+   # Copyright (c) 2026 Contributors to the Eclipse Foundation
+   #
+   # See the NOTICE file(s) distributed with this work for additional
+   # information regarding copyright ownership.
+   #
+   # This program and the accompanying materials are made available under the
+   # terms of the Apache License Version 2.0 which is available at
+   # https://www.apache.org/licenses/LICENSE-2.0
+   #
+   # SPDX-License-Identifier: Apache-2.0
+   # *******************************************************************************
+
+Feature Requirements
+====================
+
+This page lists the functional requirements for the ``score::time`` module.
+
+
+FR-1 — Vehicle Time Synchronization
+-----------------------------------
+
+
+The score::time feature shall synchronize the local clock with an external Time Master using the gPTP protocol (IEEE 802.1AS).
+
+
+FR-2 — Vehicle Time Sync Precision
+----------------------------------
+
+
+The score::time feature shall synchronize the local time base with the Time Master within a defined precision, based on the system setup.
+
+- For AVB nodes, the maximum difference between two AVB ports/ECUs in SYNC may be 1 μs.
+- For non-AVB nodes, the precision may be relaxed to 200–500 μs.
+
+
+FR-3 — Vehicle Time Base API
+----------------------------
+
+
+The score::time feature shall provide an API to access the synchronized vehicle time.
+
+
+FR-4 — Vehicle Time Base Accuracy Qualifier
+-------------------------------------------
+
+
+The score::time feature shall provide an API to read the accuracy qualifier of the local synchronized time base.
+
+The qualifier reflects whether:
+
+- the time base is synchronized to an external time source
+- time jumps exist (past or future)
+- time increases monotonically
+
+
+FR-5 — Vehicle Time Base Time Point Qualifier
+---------------------------------------------
+
+
+The score::time feature shall provide an API to read the time point qualifier of the local synchronized time base.
+
+The qualifier reflects whether the time point is ASIL-B or QM data.
+
+
+FR-6 — Vehicle Time Control Flow
+--------------------------------
+
+
+Access to time and metadata shall be fast and efficient, avoiding kernel calls and heavy resource manager involvement.
+
+Use case: frequent access by multiple clients.
+
+
+FR-7 — Vehicle Time Synchronization Logging
+-------------------------------------------
+
+
+The score::time feature shall provide a mechanism to log the internal state of the synchronization process.
+
+Use case: debugging and diagnostics.
+
+
+FR-8 — score::time External Synchronization
+-------------------------------------------
+
+
+The score::time feature shall support synchronization with external time sources such as UTC from GPS.
+
+
+FR-9 — Absolute Time Base API
+-----------------------------
+
+
+The score::time feature shall provide an API to read the absolute time base synchronized to external sources.
+
+
+FR-10 — Absolute Time Base Accuracy Qualifier
+---------------------------------------------
+
+
+The score::time feature shall provide an API to read the accuracy qualifier of the absolute time base, synchronized to external time sources.
+
+
+FR-11 — Absolute Time Base Security Qualifier
+---------------------------------------------
+
+
+The score::time feature shall provide an API to read the security qualifier of the absolute time base, synchronized to external time sources.
+
+The security level may be indicated as:
+
+- No time available
+- Time not trustworthy
+- Time trustworthy
+- Time very trustworthy
+
+
+FR-12 — Absolute Time Synchronization Status Log
+------------------------------------------------
+
+
+The score::time feature shall provide a mechanism to log the internal state of the absolute time synchronization process, to support debugging and diagnosis.
+
+
+FR-13 — High Precision Clock API
+--------------------------------
+
+
+The score::time feature shall provide an API to read the high precision clock with nanosecond precision.
+
+The clock to which the high precision clock is mapped depends on the system design.
+
+Use case: time-critical applications such as audio/video streaming, event logging, and diagnostics.
+
+
+FR-14 — Monotonic Clock API
+---------------------------
+
+
+The score::time feature shall provide an API to read a monotonic, non-adjustable clock value.
+
+
+FR-15 — score::time Mocking APIs
+--------------------------------
+
+
+The score::time feature shall provide support for mocking its public interfaces, enabling unit, component, and integration testing of applications.
+