# Software Feature Traceability
# ASF Sensor Hub Feature Mapping

**Document Type:** Feature Traceability Documentation  
**Version:** 1.0  
**Date:** 2025-01-19  

## Overview

This document provides complete traceability mapping for all software features in the ASF Sensor Hub system, showing relationships between software features, system features, system requirements, and implementing components.

## Software Features Summary

| Feature ID | Feature Name | Sub-Features | System Feature Group | Status |
|------------|--------------|--------------|---------------------|--------|
| F-DAQ | Sensor Data Acquisition | F-DAQ-001 to F-DAQ-005 | FG-DAQ | ✅ Complete |
| F-DQC | Data Quality & Calibration | F-DQC-001 to F-DQC-005 | FG-DQC | ✅ Complete |
| F-COM | Communication | F-COM-001 to F-COM-005 | FG-COM | ✅ Complete |
| F-DIAG | Diagnostics & Health Monitoring | F-DIAG-001 to F-DIAG-004 | FG-DIAG | ✅ Complete |
| F-DATA | Persistence & Data Management | F-DATA-001 to F-DATA-005 | FG-DATA | ✅ Complete |
| F-OTA | Firmware Update (OTA) | F-OTA-001 to F-OTA-005 | FG-OTA | ✅ Complete |
| F-SEC | Security & Safety | F-SEC-001 to F-SEC-004 | FG-SEC | ✅ Complete |
| F-SYS | System Management | F-SYS-001 to F-SYS-005 | FG-SYS | ✅ Complete |
| F-PWR | Power & Fault Handling | F-PWR-001 to F-PWR-002 | FG-PWR | ✅ Complete |
| F-HW | Hardware Abstraction | F-HW-001 to F-HW-002 | FG-HW | ✅ Complete |

## Feature to System Requirements Mapping

### F-DAQ: Sensor Data Acquisition
**System Requirements Covered:**
- SR-DAQ-001: Multi-Sensor Support
- SR-DAQ-002: High-Frequency Sampling  
- SR-DAQ-003: Local Data Filtering
- SR-DAQ-004: Timestamped Data Generation
- SR-DAQ-005: Sensor State Management

**Primary Components:**
- Sensor Manager (`application_layer/business_stack/sensor_manager/`)
- Sensor Drivers (`drivers/sensors/`)
- Event System (`application_layer/business_stack/event_system/`)
- Data Pool (`application_layer/DP_stack/data_pool/`)

### F-DQC: Data Quality & Calibration
**System Requirements Covered:**
- SR-DQC-001: Automatic Sensor Detection
- SR-DQC-002: Sensor Type Enforcement
- SR-DQC-003: Sensor Failure Detection
- SR-DQC-004: Machine Constants Management
- SR-DQC-005: Calibration Parameter Application

**Primary Components:**
- Machine Constant Manager (`application_layer/business_stack/machine_constant_manager/`)
- Sensor Manager (`application_layer/business_stack/sensor_manager/`)
- Persistence (`application_layer/DP_stack/persistence/`)

### F-COM: Communication
**System Requirements Covered:**
- SR-COM-001: Main Hub Communication
- SR-COM-002: Secure Communication Protocols
- SR-COM-003: On-Demand Data Broadcasting
- SR-COM-004: Peer Communication
- SR-COM-005: Communication Fault Tolerance

**Primary Components:**
- Main Hub APIs (`application_layer/business_stack/main_hub_apis/`)
- Network Stack (`drivers/network_stack/`)
- Event System (`application_layer/business_stack/event_system/`)

### F-DIAG: Diagnostics & Health Monitoring
**System Requirements Covered:**
- SR-DIAG-001: Diagnostic Code Management
- SR-DIAG-002: Diagnostic Data Storage
- SR-DIAG-003: Diagnostic Session Support
- SR-DIAG-004: Layered Watchdog System

**Primary Components:**
- Diagnostics Task (`application_layer/diag_task/`)
- Error Handler (`application_layer/error_handler/`)
- Persistence (`application_layer/DP_stack/persistence/`)

### F-DATA: Persistence & Data Management
**System Requirements Covered:**
- SR-DATA-001: Persistent Sensor Data Storage
- SR-DATA-002: Data Persistence Abstraction
- SR-DATA-003: Safe Data Handling During Transitions
- SR-DATA-004: Data Integrity Protection
- SR-DATA-005: Storage Capacity Management

**Primary Components:**
- Data Pool (`application_layer/DP_stack/data_pool/`)
- Persistence (`application_layer/DP_stack/persistence/`)
- SD Card Driver (`drivers/SDcard/`)
- NVM Driver (`drivers/nvm/`)

### F-OTA: Firmware Update (OTA)
**System Requirements Covered:**
- SR-OTA-001: OTA Update Negotiation
- SR-OTA-002: Firmware Reception and Storage
- SR-OTA-003: Firmware Integrity Validation
- SR-OTA-004: Safe Firmware Activation
- SR-OTA-005: OTA State Management

**Primary Components:**
- OTA Manager (`application_layer/business_stack/fw_upgrader/`)
- State Manager (`application_layer/business_stack/STM/`)
- Persistence (`application_layer/DP_stack/persistence/`)
- Security Manager (`application_layer/security/`)

### F-SEC: Security & Safety
**System Requirements Covered:**
- SR-SEC-001: Secure Boot
- SR-SEC-002: Flash Encryption
- SR-SEC-003: Certificate Management
- SR-SEC-004: Security Violation Handling

**Primary Components:**
- Security Manager (`application_layer/security/`)
- Secure Boot (`bootloader/secure_boot/`)
- Encryption Engine (`application_layer/security/crypto/`)
- Certificate Manager (`application_layer/security/cert_mgr/`)

### F-SYS: System Management
**System Requirements Covered:**
- SR-SYS-001: System State Machine
- SR-SYS-002: State-Aware Operation
- SR-SYS-003: Controlled Teardown
- SR-SYS-004: Local Human-Machine Interface
- SR-SYS-005: Engineering Access

**Primary Components:**
- State Manager (`application_layer/business_stack/STM/`)
- HMI Manager (`application_layer/hmi/`)
- Event System (`application_layer/business_stack/event_system/`)

### F-PWR: Power & Fault Handling
**System Requirements Covered:**
- SR-PWR-001: Brownout Detection
- SR-PWR-002: Power-Loss Recovery
- SR-PWR-003: Fault Classification
- SR-PWR-004: Fault Escalation

**Primary Components:**
- Power Manager (`application_layer/power_manager/`)
- Error Handler (`application_layer/error_handler/`)
- Persistence (`application_layer/DP_stack/persistence/`)

### F-HW: Hardware Abstraction
**System Requirements Covered:**
- SR-HW-001: Sensor Abstraction Layer
- SR-HW-002: Hardware Interface Abstraction
- SR-HW-003: GPIO Discipline

**Primary Components:**
- Sensor Abstraction Layer (`drivers/sensor_abstraction/`)
- Hardware Interface Manager (`drivers/hw_interface_mgr/`)
- GPIO Manager (`drivers/gpio_manager/`)
- ESP-IDF Wrappers (`ESP_IDF_FW_wrappers/`)

## Cross-Feature Dependencies

| Feature | Depends On | Dependency Type |
|---------|------------|-----------------|
| F-DAQ | F-HW | Hardware abstraction for sensor access |
| F-DAQ | F-DATA | Data persistence for sensor readings |
| F-DQC | F-DAQ | Sensor data for quality validation |
| F-DQC | F-DATA | Machine constants persistence |
| F-COM | F-SEC | Secure communication protocols |
| F-COM | F-DATA | Data access for transmission |
| F-DIAG | F-DATA | Diagnostic data persistence |
| F-DIAG | F-SYS | System state awareness |
| F-OTA | F-SEC | Secure firmware validation |
| F-OTA | F-SYS | State coordination during updates |
| F-SYS | F-DIAG | System health monitoring |
| F-PWR | F-DATA | Critical data preservation |

## Feature Implementation Status

All 10 software features are **complete** with:
- ✅ Complete sub-feature specifications
- ✅ System requirements coverage
- ✅ Component implementation mapping
- ✅ Interface specifications
- ✅ Mermaid interaction diagrams
- ✅ State-dependent behavior definitions
- ✅ Testing and validation criteria

## Traceability Validation

### Requirements Coverage
- **Total System Requirements:** 45+ SR-XXX requirements
- **Covered by Features:** 100% coverage achieved
- **Orphan Requirements:** None identified

### Component Coverage
- **Total Components:** 25+ components identified
- **Mapped to Features:** 100% coverage achieved
- **Orphan Components:** None identified

### Interface Coverage
- **Public APIs:** All major interfaces documented
- **Integration Points:** Complete cross-component mapping
- **Communication Protocols:** All protocols specified

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**Document Status:** Complete and Validated  
**Last Updated:** 2025-01-19  
**Next Review:** After implementation phase begins