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Comprehensive Learning Plan Embassy.rs Development with Claude Code for STM32U585

Authors
  • avatar
    Name
    Yinhuan Yuan
    Twitter

Introduction

Phase 1: Environment Setup & Claude Code Mastery (Week 1-2)

1.1 Claude Code Installation and Configuration

# Install Claude Code
npm install -g @anthropic/claude-code

# Configure authentication
claude-code auth login

# Set up project-specific configuration
claude-code config set model claude-opus-4-1-20250805
claude-code config set context-window 200000

1.2 STM32U585 Development Environment

# Use Claude Code to set up the toolchain
claude-code task "Set up a complete Rust embedded development environment for STM32U585 with:
- rustup with nightly toolchain
- probe-rs for debugging
- cargo-embassy for project templates
- arm-none-eabi-gcc toolchain
- Create installation scripts for Linux/macOS/Windows"

# Hardware-specific tools
claude-code task "Create a script to install and configure:
- STM32CubeProgrammer CLI tools
- OpenOCD with STM32U5 support
- probe-rs with STM32U585 chip configuration"

1.3 WeAct Black Pill Board Analysis

claude-code task "Research and document the WeAct Studio STM32U585 Black Pill:
- Pin mappings and peripherals
- Crystal frequencies (HSE/LSE)
- USB-C power delivery capabilities
- Debug interface (SWD pins)
- Create a comprehensive board reference document"

Phase 2: Embassy.rs Fundamentals (Week 2-3)

2.1 Embassy Architecture Deep Dive

claude-code task "Create a learning module explaining embassy-rs architecture:
- Async/await in no_std environments
- Embassy executor vs RTIC comparison
- Hardware abstraction layers (HAL)
- Time driver implementation
- Create visual diagrams using mermaid"

2.2 Basic Embassy Project Structure

claude-code task "Generate a minimal embassy-rs project for STM32U585:
- Cargo.toml with correct dependencies
- memory.x for Black Pill's memory layout (2MB Flash, 786KB RAM)
- build.rs for linking
- .cargo/config.toml for target configuration
- Basic src/main.rs with LED blink"

# Project template structure
claude-code task "Create a reusable project template with:
src/
├── main.rs
├── tasks/
│   ├── mod.rs
│   ├── led.rs
│   └── usb.rs
├── drivers/
│   └── mod.rs
└── config.rs"

2.3 Core Embassy Patterns

claude-code task "Implement and explain these embassy patterns:
1. Spawning async tasks with #[embassy_executor::task]
2. Channel communication between tasks
3. Mutex and signal usage in async context
4. Timer and delay implementations
5. Interrupt handling with embassy"

Phase 3: STM32U585-Specific Development (Week 3-4)

3.1 Peripheral Drivers Implementation

claude-code task "Implement embassy-based drivers for STM32U585 peripherals:
- GPIO with async interrupts
- USART with DMA transfers
- SPI with async transactions
- I2C with error handling
- ADC with continuous sampling
- TIM for PWM generation"

3.2 Power Management Features

claude-code task "Develop power-efficient code leveraging STM32U585's features:
- Low-power modes (Sleep, Stop, Standby)
- Dynamic voltage scaling
- RTC wakeup implementation
- Power consumption measurement techniques
- Create benchmarks for different scenarios"

3.3 Security Features Integration

claude-code task "Implement STM32U585's security features with embassy:
- TrustZone configuration
- Secure boot implementation
- Hardware crypto acceleration (AES, SHA)
- True Random Number Generator (TRNG)
- Secure key storage using OTP"

Phase 4: Advanced Embassy Applications (Week 4-5)

4.1 USB Device Implementation

claude-code task "Create a USB composite device with embassy-usb:
- CDC-ACM for serial communication
- MSC for mass storage
- HID for custom protocols
- Proper descriptor configuration
- Error handling and hot-plug support"

4.2 Network Stack Integration

claude-code task "If using external network module, implement:
- embassy-net integration
- TCP/IP stack configuration
- Async HTTP client
- MQTT client implementation
- TLS support with embedded-tls"

4.3 Real-Time Operating Capabilities

claude-code task "Develop a real-time application showcasing:
- Priority-based task scheduling
- Deadline-driven task execution
- Resource sharing with priority ceiling
- Interrupt latency measurements
- Worst-case execution time analysis"

Phase 5: Testing and Debugging Infrastructure (Week 5-6)

5.1 Hardware-in-the-Loop Testing

claude-code task "Create HIL test framework:
- defmt for efficient logging
- probe-rs RTT for real-time output
- GPIO-based test fixtures
- Automated test runner with cargo-embed
- Performance profiling setup"

5.2 Emulation and Simulation

claude-code task "Set up QEMU-based testing:
- Configure QEMU for STM32U585
- Create embassy-compatible HAL mocks
- Integration with CI/CD pipeline
- Code coverage analysis
- Fuzzing setup for robust testing"

5.3 Debugging Strategies

claude-code task "Implement comprehensive debugging tools:
- GDB server configuration with probe-rs
- VS Code debug configuration
- Memory usage analysis tools
- Stack overflow detection
- Hard fault handler implementation"

Phase 6: Production-Ready Projects (Week 6-8)

6.1 Sensor Data Logger Project

claude-code task "Build a complete sensor data logger:
- Multiple I2C/SPI sensors
- SD card storage with async FAT32
- USB data export
- Low-power operation with RTC timestamps
- Configuration via USB CDC"

6.2 Secure IoT Device

claude-code task "Develop a secure IoT endpoint:
- TLS client certificate authentication
- OTA firmware updates with rollback
- Secure element integration
- Environmental monitoring
- MQTT telemetry with QoS levels"

6.3 Motor Control Application

claude-code task "Create a BLDC motor controller:
- 6-step commutation with hall sensors
- Field-oriented control (FOC)
- Current sensing and protection
- CAN bus communication
- Temperature monitoring"

Phase 7: Optimization and Best Practices (Week 8-9)

7.1 Performance Optimization

claude-code task "Optimize embassy applications:
- Profile async task overhead
- Minimize memory allocations
- Optimize interrupt latency
- DMA usage patterns
- Compiler optimization flags analysis"

7.2 Code Quality and Maintenance

claude-code task "Establish quality practices:
- Clippy configuration for embedded
- Documentation standards
- Error handling patterns
- Logging strategies
- Version control workflows"

7.3 Production Deployment

claude-code task "Create production deployment pipeline:
- Binary size optimization
- Bootloader integration
- Firmware signing process
- Factory programming scripts
- Field debugging capabilities"

Phase 8: Advanced Topics and Specialization (Week 9-10)

8.1 Custom Embassy Executors

claude-code task "Implement custom executor features:
- Multi-core executor for dual-core STM32
- Deterministic scheduling
- Task migration strategies
- Custom allocators
- Benchmark against default executor"

8.2 Integration with RTOS

claude-code task "Hybrid embassy-RTOS implementation:
- FreeRTOS integration layer
- Task synchronization bridges
- Shared resource management
- Performance comparison
- Use case analysis"

8.3 Contributing to Embassy Ecosystem

claude-code task "Prepare contributions:
- Identify missing STM32U5 features
- Write HAL implementations
- Create example applications
- Documentation improvements
- Test coverage additions"

Continuous Learning Resources

Daily Practice Routine

# Morning: Review and experiment
claude-code task "Review yesterday's code and identify improvements"
claude-code task "Implement one new embassy feature or pattern"

# Afternoon: Project work
claude-code task "Work on current project milestone"
claude-code task "Debug and optimize existing code"

# Evening: Documentation and community
claude-code task "Document today's learnings"
claude-code task "Review embassy-rs GitHub issues and PRs"

Weekly Challenges

claude-code challenge week-1 "Implement interrupt-driven UART without DMA"
claude-code challenge week-2 "Create zero-allocation async task system"
claude-code challenge week-3 "Build USB bootloader with embassy"
claude-code challenge week-4 "Implement hardware fault recovery system"

Resource Library Setup

claude-code task "Create a personal embassy-rs knowledge base with:
- Code snippets database
- Performance benchmarks
- Hardware quirks documentation
- Debugging techniques catalog
- Project templates repository"

Claude Code Workflow Optimization

Iterative Development Pattern

# Initial implementation
claude-code task "Implement basic GPIO driver for STM32U585"

# Review and improve
claude-code review "Analyze the GPIO driver for safety and performance"

# Test generation
claude-code test "Create comprehensive tests for GPIO driver"

# Documentation
claude-code document "Generate API documentation for GPIO driver"

# Optimization
claude-code optimize "Optimize GPIO driver for size and speed"

Multi-Agent Collaboration

# Use Claude Code's multi-agent capabilities
claude-code architect "Design system architecture for [project]"
claude-code implement "Implement the architecture design"
claude-code review "Review implementation for best practices"
claude-code test "Create test suite for implementation"

Success Metrics and Milestones

  1. Week 2: Successfully blink LED with embassy on Black Pill
  2. Week 4: Complete async peripheral drivers suite
  3. Week 6: Deploy first production-ready application
  4. Week 8: Achieve <100μA sleep current consumption
  5. Week 10: Contribute to embassy-rs repository

Troubleshooting Guide

# Common issues and solutions
claude-code troubleshoot "Embassy executor panics on STM32U585"
claude-code troubleshoot "DMA transfer corruption with embassy"
claude-code troubleshoot "USB enumeration fails with embassy-usb"
claude-code troubleshoot "Hard fault in async interrupt handler"

This comprehensive plan leverages Claude Code's capabilities to accelerate your embassy.rs learning journey while building practical skills for STM32U585 development. The progression from basics to advanced topics ensures a solid foundation while the specific focus on the WeAct Black Pill board provides immediate practical application.