Kai Chappell
54c87c5ee7
- Add semantic versioning section to development plan - Map sprint milestones to version tags - Create Gitea Actions CI workflow (lint, typecheck, test, release) - Add CHANGELOG.md following Keep a Changelog format
654 lines
18 KiB
Markdown
654 lines
18 KiB
Markdown
# Phase 1 Development Plan: py-dvt-ate MVP
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| Document ID | DEV-001 |
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| Version | 2.0.0 |
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| Status | Approved |
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| Author | Kai Chappell |
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| Created | 2025-12-01 |
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| Last Updated | 2025-12-01 |
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---
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## Purpose
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This document defines **when** to build each component of py-dvt-ate Phase 1. It provides an iterative sprint breakdown with atomic tasks optimised for incremental development.
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For **what** the system must do, see `01_requirements.md`.
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For **how** to implement the system, see `02_technical_specification.md`.
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For **why** decisions were made, see `03_architecture_decisions.md`.
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---
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## Design Principles
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1. **Small, Focused Commits** - Each task = 1 commit, ~50-150 lines changed
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2. **Stubs First** - Define interfaces/types before implementation
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3. **Vertical Slice First** - Get something visual early, then build infrastructure
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4. **Minimal Context** - Each task completable with knowledge of 1-3 files
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5. **Test Alongside** - Write tests immediately after implementation
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6. **Iterative Refinement** - Get something working, then improve
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---
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## Sprint Structure
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Each sprint is ~1-2 days of work, producing demonstrable progress.
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**Vertical Slice Strategy:**
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- Sprints 1-3: Foundation + Physics Engine (the core simulation)
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- Sprint 4: Dashboard (see the physics working!)
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- Sprints 5-11: Infrastructure/Plumbing (SCPI, TCP, HAL)
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- Sprints 12-17: Test Framework, CLI, Polish
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---
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## Sprint 1: Project Foundation
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**Goal:** Establish project structure and build system.
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### Task 1.1: Create pyproject.toml
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- Create minimal pyproject.toml with project metadata
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- Package name: `py_dvt_ate`
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- Include only core dependencies initially
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- **Commit:** "Add pyproject.toml with core dependencies"
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### Task 1.2: Create directory structure (empty)
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- Create src/py_dvt_ate/ with __init__.py and py.typed
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- Create empty subpackage directories with __init__.py
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- Create tests/ directory structure
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- Create config/ directory
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- **Commit:** "Add package directory structure"
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### Task 1.3: Add development tooling config
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- Add ruff configuration to pyproject.toml
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- Add mypy configuration to pyproject.toml
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- Add pytest configuration to pyproject.toml
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- **Commit:** "Configure development tooling (ruff, mypy, pytest)"
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### Task 1.4: Create basic CLI entry point
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- Create src/py_dvt_ate/cli/__init__.py
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- Create src/py_dvt_ate/cli/main.py with Typer app stub
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- Add version command only
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- **Commit:** "Add CLI entry point with version command"
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---
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## Sprint 2: Physics Engine Core (Stubs)
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**Goal:** Define physics interfaces and data structures.
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### Task 2.1: Define thermal state dataclasses
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- Create src/py_dvt_ate/physics/__init__.py
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- Create src/py_dvt_ate/physics/models.py
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- Define ThermalState (frozen dataclass)
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- Define ElectricalState (frozen dataclass)
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- **Commit:** "Add physics state dataclasses"
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### Task 2.2: Define DUT base protocol
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- Create src/py_dvt_ate/physics/dut/__init__.py
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- Create src/py_dvt_ate/physics/dut/base.py
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- Define DUTModel Protocol with method signatures
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- **Commit:** "Add DUT model protocol"
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### Task 2.3: Create physics engine stub
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- Create src/py_dvt_ate/physics/engine.py
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- Define PhysicsEngine class with stub methods
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- Methods return placeholder values
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- **Commit:** "Add physics engine stub"
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### Task 2.4: Add physics unit tests (for stubs)
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- Create tests/unit/test_physics_models.py
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- Test dataclass creation and immutability
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- **Commit:** "Add physics model unit tests"
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---
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## Sprint 3: Physics Engine Implementation
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**Goal:** Implement working physics simulation.
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### Task 3.1: Implement thermal calculations
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- Create src/py_dvt_ate/physics/thermal.py
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- Implement first-order thermal response calculations
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- Pure functions, no state
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- **Commit:** "Implement thermal calculation functions"
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### Task 3.2: Implement LDO DUT model
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- Create src/py_dvt_ate/physics/dut/ldo.py
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- Implement LDOModel class
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- Temperature-dependent Vout, Iq calculations
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- Power dissipation calculation
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- **Commit:** "Implement LDO DUT model"
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### Task 3.3: Implement physics engine step()
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- Update engine.py with working step() method
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- Integrate thermal calculations
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- Integrate DUT model
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- **Commit:** "Implement physics engine stepping"
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### Task 3.4: Add physics integration tests
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- Create tests/unit/test_physics_engine.py
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- Test thermal settling behaviour
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- Test self-heating effects
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- **Commit:** "Add physics engine tests"
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---
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## Sprint 4: Streamlit Dashboard (Early Visual!)
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**Goal:** Visualise physics engine directly - see something working!
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### Task 4.1: Create dashboard app skeleton
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- Create src/py_dvt_ate/dashboard/__init__.py
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- Create src/py_dvt_ate/dashboard/app.py
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- Basic Streamlit page with title
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- **Commit:** "Add Streamlit dashboard skeleton"
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### Task 4.2: Add physics visualisation panel
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- Create direct connection to PhysicsEngine (no HAL yet)
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- Display chamber temperature, DUT temperature
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- Real-time updating chart
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- **Commit:** "Add physics visualisation panel"
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### Task 4.3: Add interactive controls
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- Temperature setpoint slider
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- Input voltage control
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- Load current control
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- Start/Stop simulation button
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- **Commit:** "Add interactive physics controls"
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### Task 4.4: Add self-heating demonstration
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- Show junction temperature vs case temperature
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- Demonstrate thermal coupling visually
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- **Commit:** "Add self-heating visualisation"
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**Milestone:** Working "Virtual Lab Bench" toy to play with!
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---
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## Sprint 5: SCPI Foundation
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**Goal:** Create SCPI parsing infrastructure.
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### Task 5.1: Define SCPI command dataclass
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- Create src/py_dvt_ate/instruments/__init__.py
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- Create src/py_dvt_ate/instruments/scpi_parser.py
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- Define SCPICommand dataclass
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- **Commit:** "Add SCPI command dataclass"
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### Task 5.2: Implement SCPI parser
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- Implement SCPIParser.parse() method
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- Handle queries, commands with arguments
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- Handle IEEE 488.2 common commands (*IDN?, *RST)
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- **Commit:** "Implement SCPI parser"
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### Task 5.3: Add SCPI parser tests
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- Create tests/unit/test_scpi_parser.py
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- Test various command formats
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- Test edge cases
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- **Commit:** "Add SCPI parser tests"
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---
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## Sprint 6: Instrument Base & Thermal Chamber Simulator
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**Goal:** Create first virtual instrument.
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### Task 6.1: Define instrument base class
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- Create src/py_dvt_ate/instruments/base.py
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- Define BaseInstrument with common functionality
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- Command dispatch mechanism
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- **Commit:** "Add base instrument class"
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### Task 6.2: Create thermal chamber simulator stub
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- Create src/py_dvt_ate/instruments/thermal_chamber.py
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- Define ThermalChamberSim class
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- Stub SCPI command handlers
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- **Commit:** "Add thermal chamber simulator stub"
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### Task 6.3: Implement thermal chamber commands
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- Implement TEMP:SETPOINT, TEMP:ACTUAL?, TEMP:STAB?
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- Connect to physics engine reference
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- **Commit:** "Implement thermal chamber SCPI commands"
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### Task 6.4: Add thermal chamber tests
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- Create tests/unit/test_thermal_chamber.py
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- Test SCPI command responses
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- **Commit:** "Add thermal chamber simulator tests"
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---
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## Sprint 7: Power Supply & DMM Simulators
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**Goal:** Complete instrument simulators.
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### Task 7.1: Create power supply simulator
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- Create src/py_dvt_ate/instruments/power_supply.py
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- Implement PSU SCPI commands
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- VOLT, CURR, OUTP, MEAS commands
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- **Commit:** "Add power supply simulator"
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### Task 7.2: Add power supply tests
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- Create tests/unit/test_power_supply.py
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- **Commit:** "Add power supply simulator tests"
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### Task 7.3: Create DMM simulator
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- Create src/py_dvt_ate/instruments/multimeter.py
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- Implement DMM SCPI commands
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- MEAS:VOLT:DC?, CONF commands
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- **Commit:** "Add multimeter simulator"
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### Task 7.4: Add DMM tests
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- Create tests/unit/test_multimeter.py
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- **Commit:** "Add multimeter simulator tests"
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---
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## Sprint 8: TCP Server
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**Goal:** Expose instruments over network.
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### Task 8.1: Create async TCP server foundation
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- Create src/py_dvt_ate/server/__init__.py
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- Create src/py_dvt_ate/server/tcp_server.py
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- Define InstrumentServer class with asyncio
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- **Commit:** "Add async TCP server foundation"
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### Task 8.2: Implement client connection handling
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- Handle multiple concurrent connections
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- Line-based SCPI protocol (newline terminated)
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- **Commit:** "Implement TCP client handling"
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### Task 8.3: Create server main entry point
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- Create src/py_dvt_ate/server/main.py
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- Wire up physics engine and instruments
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- Add CLI command to start server
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- **Commit:** "Add simulation server entry point"
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### Task 8.4: Add server integration tests
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- Create tests/integration/test_tcp_server.py
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- Test connection and basic commands
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- **Commit:** "Add TCP server integration tests"
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---
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## Sprint 9: Transport Layer (Client Side)
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**Goal:** Create client-side communication.
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### Task 9.1: Define transport protocol
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- Create src/py_dvt_ate/transport/__init__.py
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- Create src/py_dvt_ate/transport/base.py
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- Define Transport Protocol class
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- **Commit:** "Add transport protocol definition"
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### Task 9.2: Implement TCP transport
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- Create src/py_dvt_ate/transport/tcp.py
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- Implement TCPTransport class
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- connect(), write(), read(), query() methods
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- **Commit:** "Implement TCP transport"
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### Task 9.3: Add transport tests
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- Create tests/unit/test_transport.py
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- Test with mock socket
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- **Commit:** "Add transport layer tests"
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---
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## Sprint 10: SCPI Drivers
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**Goal:** Create instrument drivers using transport.
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### Task 10.1: Define driver base class
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- Create src/py_dvt_ate/drivers/__init__.py
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- Create src/py_dvt_ate/drivers/base.py
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- Define BaseDriver with transport dependency
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- **Commit:** "Add driver base class"
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### Task 10.2: Implement thermal chamber driver
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- Create src/py_dvt_ate/drivers/thermal_chamber.py
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- Methods map to SCPI commands
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- **Commit:** "Add thermal chamber driver"
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### Task 10.3: Implement PSU and DMM drivers
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- Create src/py_dvt_ate/drivers/power_supply.py
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- Create src/py_dvt_ate/drivers/multimeter.py
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- **Commit:** "Add PSU and DMM drivers"
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### Task 10.4: Add driver tests
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- Create tests/unit/test_drivers.py
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- Test command formatting
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- **Commit:** "Add driver unit tests"
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---
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## Sprint 11: Hardware Abstraction Layer
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**Goal:** Create HAL interfaces and implementations.
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### Task 11.1: Define HAL protocols
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- Create src/py_dvt_ate/hal/__init__.py
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- Create src/py_dvt_ate/hal/interfaces.py
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- Define IThermalChamber, IPowerSupply, IMultimeter
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- **Commit:** "Add HAL protocol definitions"
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### Task 11.2: Implement HAL wrappers
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- Create src/py_dvt_ate/hal/impl/__init__.py
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- Create HAL implementation classes
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- Wrap drivers with HAL interface
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- **Commit:** "Add HAL implementations"
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### Task 11.3: Create instrument factory
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- Create src/py_dvt_ate/hal/factory.py
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- InstrumentSet dataclass
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- InstrumentFactory.create() method
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- **Commit:** "Add instrument factory"
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### Task 11.4: Add HAL tests
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- Create tests/unit/test_hal.py
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- Test factory creates correct types
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- **Commit:** "Add HAL unit tests"
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---
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## Sprint 12: Configuration System
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**Goal:** YAML-based configuration.
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### Task 12.1: Define config models
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- Create src/py_dvt_ate/config/__init__.py
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- Create src/py_dvt_ate/config/models.py
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- Pydantic models for all config sections
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- **Commit:** "Add configuration Pydantic models"
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### Task 12.2: Implement config loader
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- Create src/py_dvt_ate/config/loader.py
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- Load YAML, validate with Pydantic
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- Environment variable overrides
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- **Commit:** "Implement configuration loader"
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### Task 12.3: Create default config file
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- Create config/default.yaml
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- Document all options
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- **Commit:** "Add default configuration file"
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### Task 12.4: Add config tests
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- Create tests/unit/test_config.py
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- **Commit:** "Add configuration tests"
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---
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## Sprint 13: Data Persistence
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**Goal:** Store test results.
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### Task 13.1: Define data models
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- Create src/py_dvt_ate/data/__init__.py
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- Create src/py_dvt_ate/data/models.py
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- TestRun, TestResult, Measurement dataclasses
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- **Commit:** "Add data persistence models"
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### Task 13.2: Create SQLite repository
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- Create src/py_dvt_ate/data/repository.py
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- Implement test run and result storage
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- **Commit:** "Implement SQLite repository"
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### Task 13.3: Add Parquet measurement storage
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- Extend repository for Parquet files
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- Batch measurement writing
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- **Commit:** "Add Parquet measurement storage"
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### Task 13.4: Add data persistence tests
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- Create tests/unit/test_repository.py
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- **Commit:** "Add data persistence tests"
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---
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## Sprint 14: Test Executive Framework
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**Goal:** Test execution orchestration.
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### Task 14.1: Define test interface and models
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- Create src/py_dvt_ate/executive/__init__.py
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- Create src/py_dvt_ate/executive/models.py
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- TestStatus enum, TestContext, ITest protocol
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- **Commit:** "Add test executive models"
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### Task 14.2: Implement test logger
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- Create src/py_dvt_ate/executive/logger.py
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- Log measurements and events
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- **Commit:** "Implement test logger"
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### Task 14.3: Implement limit checker
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- Create src/py_dvt_ate/executive/limits.py
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- Evaluate pass/fail against limits
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- **Commit:** "Implement limit checker"
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### Task 14.4: Implement test sequencer
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- Create src/py_dvt_ate/executive/sequencer.py
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- Run tests, collect results
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- **Commit:** "Implement test sequencer"
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---
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## Sprint 15: TempCo Characterisation Test
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**Goal:** First complete DVT test.
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### Task 15.1: Define test base class
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- Create src/py_dvt_ate/tests/__init__.py
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- Create src/py_dvt_ate/tests/base.py
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- Common test utilities
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- **Commit:** "Add DVT test base class"
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### Task 15.2: Implement TempCo test
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- Create src/py_dvt_ate/tests/tempco.py
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- Temperature sweep logic
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- Vout measurement at each temperature
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- TempCo calculation
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- **Commit:** "Implement TempCo characterisation test"
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### Task 15.3: Add TempCo test integration tests
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- Create tests/integration/test_tempco.py
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- Full end-to-end test with simulator
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- **Commit:** "Add TempCo integration tests"
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---
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## Sprint 16: CLI Enhancement
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**Goal:** Complete CLI for test execution.
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### Task 16.1: Add server commands to CLI
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- start-server command
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- Configure ports via options
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- **Commit:** "Add server CLI commands"
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### Task 16.2: Add test execution commands
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- run-test command
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- List available tests
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- **Commit:** "Add test execution CLI commands"
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### Task 16.3: Add instrument query commands
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- Direct instrument query/command
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- Useful for debugging
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- **Commit:** "Add instrument CLI commands"
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---
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## Sprint 17: Dashboard Enhancement & Polish
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**Goal:** Connect dashboard to full stack + end-to-end verification.
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### Task 17.1: Update dashboard to use HAL
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- Replace direct physics connection with HAL
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- Add instrument status panels
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- **Commit:** "Update dashboard to use HAL"
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### Task 17.2: Add test execution page
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- Run tests from dashboard
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- Progress display
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- **Commit:** "Add test execution dashboard page"
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### Task 17.3: Add results viewer page
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- Historical results display
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- Basic charts
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- **Commit:** "Add results viewer dashboard page"
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### Task 17.4: End-to-end integration test
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- Create tests/integration/test_e2e.py
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- Full workflow: start server, run test, check results
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- **Commit:** "Add end-to-end integration test"
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### Task 17.5: Update README with usage
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- Quick start guide
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- Example commands
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- Screenshots
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- **Commit:** "Update README with usage instructions"
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### Task 17.6: Verify test coverage
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- Run coverage report
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- Add tests for gaps
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- **Commit:** "Improve test coverage to 80%+"
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---
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## File Dependencies Map
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```
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physics/models.py → (none)
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physics/dut/base.py → models.py
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physics/dut/ldo.py → base.py, models.py
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physics/thermal.py → models.py
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physics/engine.py → models.py, thermal.py, dut/base.py
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dashboard/app.py → physics/engine.py (Sprint 4, direct connection)
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instruments/scpi_parser.py → (none)
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instruments/base.py → scpi_parser.py
|
|
instruments/*_sim.py → base.py, physics/engine.py
|
|
|
|
transport/base.py → (none)
|
|
transport/tcp.py → base.py
|
|
|
|
drivers/base.py → transport/base.py
|
|
drivers/*.py → base.py
|
|
|
|
hal/interfaces.py → (none)
|
|
hal/impl/*.py → interfaces.py, drivers/*.py
|
|
hal/factory.py → interfaces.py, impl/*.py
|
|
|
|
config/models.py → (none)
|
|
config/loader.py → models.py
|
|
|
|
data/models.py → (none)
|
|
data/repository.py → models.py
|
|
|
|
executive/models.py → hal/interfaces.py
|
|
executive/*.py → models.py, data/repository.py
|
|
|
|
tests/*.py → executive/models.py, hal/interfaces.py
|
|
|
|
dashboard/app.py → hal/factory.py (Sprint 17, upgraded)
|
|
```
|
|
|
|
---
|
|
|
|
## Versioning Strategy
|
|
|
|
### Semantic Versioning
|
|
|
|
This project follows [Semantic Versioning 2.0.0](https://semver.org/):
|
|
|
|
```
|
|
MAJOR.MINOR.PATCH[-PRERELEASE]
|
|
|
|
- MAJOR: Breaking API changes
|
|
- MINOR: New features, backwards compatible
|
|
- PATCH: Bug fixes, backwards compatible
|
|
- PRERELEASE: alpha.N, beta.N, rc.N
|
|
```
|
|
|
|
### Phase 1 Version Progression
|
|
|
|
| Sprint | Version Tag | Milestone | Release Type |
|
|
|--------|-------------|-----------|--------------|
|
|
| 1 | `v0.0.1` | Project scaffolding | Internal |
|
|
| 3 | `v0.1.0-alpha.1` | Physics engine working | Pre-release |
|
|
| 4 | `v0.1.0-alpha.2` | Visual demo (dashboard) | Pre-release |
|
|
| 8 | `v0.1.0-alpha.3` | Network ready (TCP server) | Pre-release |
|
|
| 11 | `v0.1.0-beta.1` | HAL complete | Pre-release |
|
|
| 15 | `v0.1.0-beta.2` | First DVT test runs | Pre-release |
|
|
| 17 | `v0.1.0` | **MVP Complete** | Release |
|
|
|
|
### Tagging Convention
|
|
|
|
```bash
|
|
# After completing a milestone sprint:
|
|
git tag -a v0.1.0-alpha.1 -m "Physics engine working"
|
|
git push origin v0.1.0-alpha.1
|
|
```
|
|
|
|
### Version Location
|
|
|
|
The version is defined in **one place** and read elsewhere:
|
|
|
|
```
|
|
src/py_dvt_ate/__init__.py:
|
|
__version__ = "0.1.0-alpha.1"
|
|
|
|
pyproject.toml:
|
|
[project]
|
|
dynamic = ["version"]
|
|
|
|
[tool.hatch.version]
|
|
path = "src/py_dvt_ate/__init__.py"
|
|
```
|
|
|
|
### CI/CD Pipeline
|
|
|
|
On every push:
|
|
- Run `ruff check` (linting)
|
|
- Run `mypy` (type checking)
|
|
- Run `pytest` (tests)
|
|
|
|
On tag push (`v*`):
|
|
- All of the above
|
|
- Build package
|
|
- Create release
|
|
|
|
### CHANGELOG
|
|
|
|
Maintain `CHANGELOG.md` following [Keep a Changelog](https://keepachangelog.com/):
|
|
|
|
```markdown
|
|
## [Unreleased]
|
|
### Added
|
|
- ...
|
|
|
|
## [0.1.0-alpha.1] - 2025-12-XX
|
|
### Added
|
|
- Physics engine with thermal-electrical coupling
|
|
- LDO DUT model with temperature coefficient
|
|
```
|
|
|
|
---
|
|
|
|
## Milestone Summary
|
|
|
|
| Sprint | Version | Milestone | What You Can Demo |
|
|
|--------|---------|-----------|-------------------|
|
|
| 1 | `v0.0.1` | Scaffolding | Package installs |
|
|
| 3 | `v0.1.0-alpha.1` | Physics Working | Unit tests prove thermal coupling |
|
|
| 4 | `v0.1.0-alpha.2` | **Visual Demo!** | Interactive Streamlit showing physics |
|
|
| 7 | - | Instruments Done | SCPI simulators respond to commands |
|
|
| 8 | `v0.1.0-alpha.3` | Network Ready | TCP server accepts connections |
|
|
| 11 | `v0.1.0-beta.1` | HAL Complete | Abstraction layer swappable |
|
|
| 15 | `v0.1.0-beta.2` | First Test | TempCo characterisation runs |
|
|
| 17 | `v0.1.0` | **MVP Complete** | Full end-to-end workflow |
|
|
|
|
---
|
|
|
|
**End of Development Plan**
|