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🚀 E-ink Power CLI - Phase 2 Context Initializer

Project Status: ✅ PHASE 1 COMPLETE - Ready for Phase 2 Implementation

📋 Current State

You are continuing work on the eink-power-cli project, a Rust-based command-line tool for communicating with the MCXC143VFM power management controller. Phase 1 is 100% complete and the project is ready for Phase 2 implementation.

🎯 What's Already Done (Phase 1)

  • ✅ Complete CLI Framework: All commands, arguments, help system working
  • ✅ Cross-Compilation: AArch64 builds working for i.MX93 target
  • ✅ Target Deployment: Successfully deployed and tested on actual hardware
  • ✅ Project Structure: Professional Rust project with proper licensing
  • ✅ Build System: Automated build and deployment scripts
  • ✅ Documentation: Comprehensive README, implementation plan, changelog

🏗️ Project Architecture

eink-microcontroller/
├── app/                           # MCXC143VFM firmware (60+ shell commands analyzed)
└── tools/eink-power-cli/          # ← THIS PROJECT (submodule)
    ├── src/
    │   ├── main.rs                # CLI entry point ✅ COMPLETE
    │   ├── cli/mod.rs             # Command definitions ✅ COMPLETE
    │   ├── serial/
    │   │   ├── connection.rs      # 🚧 NEEDS IMPLEMENTATION
    │   │   └── protocol.rs        # 🚧 NEEDS IMPLEMENTATION
    │   ├── power/                 # Power management modules ✅ READY
    │   └── error.rs               # Error handling ✅ COMPLETE
    ├── build-aarch64.sh           # Cross-compilation script ✅ WORKING
    ├── deploy-target.sh           # Target deployment ✅ WORKING
    └── README.md                  # Complete documentation ✅ DONE

🎛️ Target Hardware - VALIDATED ✅

  • Board: i.MX93 Jaguar E-ink (imx93-jaguar-eink-fa0dc45a244b189e6ddc3a84426e24af)
  • SSH Access: fio@62.3.79.162:25 (SSH key authentication working)
  • OS: Linux-microPlatform Dynamic Devices Headless 4.0.20-2130-94
  • Architecture: aarch64 (ARM 64-bit)
  • Binary Location: /var/rootdirs/home/fio/bin/eink-power-cli
  • Status: Binary deployed and all CLI commands working perfectly

🔧 Development Environment

  • Repository: git@github.com:DynamicDevices/eink-power-cli.git (submodule)
  • Location: /home/ajlennon/data_drive/esl/eink-microcontroller/tools/eink-power-cli/
  • Cross-Compilation: aarch64-unknown-linux-gnu target configured
  • Build: ./build-aarch64.sh (2.0MB optimized binary)
  • Deploy: ./deploy-target.sh (automated deployment)

🎯 Phase 2 Objectives - READY TO IMPLEMENT

PRIMARY GOAL: Replace placeholder with actual serial communication

Current Status: All CLI commands show "Command execution not yet implemented" - this is the ONLY thing that needs to be done.

Key Implementation Points:

  1. Serial Communication (src/serial/connection.rs):

    // Currently: Placeholder implementation
// Needed: Actual tokio-serial UART communication
// Target: /dev/ttyUSB0 at 115200 baud to MCXC143VFM

  2. Command Execution (src/main.rs line ~100):

    // Currently: println!("Command execution not yet implemented");
// Needed: Actual command routing to serial communication

  3. Response Parsing (src/serial/protocol.rs):

    // Currently: Placeholder parsing
// Needed: Parse MCXC143VFM shell responses (with emojis)

📊 MCXC143VFM Controller Interface - ANALYZED

The target controller has 60+ shell commands across 5 modules:

Shell Prompts:

  • Debug: debug:~$
  • Production: prod:~$

Key Command Categories:

# System commands (WORKING IN CLI)
version                    # Get firmware version
ping                      # Connectivity test  
system info               # System information

# Power commands (WORKING IN CLI)
power pmic on|off         # Control PMIC
power wifi on|off         # Control WiFi
power disp on|off         # Control display

# Battery commands (WORKING IN CLI)  
ltc2959 read             # Read all measurements
ltc2959 status           # Battery status
ltc2959 enable           # Enable monitoring

# GPIO commands (WORKING IN CLI)
gpio get <port> <pin>    # Read GPIO
gpio set <port> <pin> <val> # Set GPIO

# NFC commands (WORKING IN CLI)
nfc status               # NFC status
nfc info                 # Device info

Response Format Examples:

📊 LTC2959 Measurements:
   🔋 Voltage: 3850 mV
   ⚡ Current: 125 mA
   🔋 Charge: 2450 mAh
   🌡️  Temperature: 23°C

🚧 What Needs Implementation

1. Serial Connection (Priority 1)

// File: src/serial/connection.rs
// Replace placeholder with actual tokio-serial implementation
// Handle: /dev/ttyUSB0, 115200 baud, timeout handling

2. Command Routing (Priority 2)

// File: src/main.rs (around line 100)
// Replace: println!("Command execution not yet implemented");
// With: Actual command execution via serial connection

3. Response Parsing (Priority 3)

// File: src/serial/protocol.rs  
// Parse controller responses with emojis and structured data
// Handle: Human and JSON output formats

🔍 Testing Strategy

Development Testing:

# Build for target
./build-aarch64.sh

# Deploy to target  
./deploy-target.sh

# Test on target
ssh -p 25 fio@62.3.79.162
~/bin/eink-power-cli --device /dev/ttyUSB0 version

Hardware Requirements:

  • MCXC143VFM power controller connected via USB serial
  • Serial device should appear as /dev/ttyUSB0 or /dev/ttyACM0
  • Controller running debug or production firmware

📚 Key Files to Modify

  1. src/serial/connection.rs - Implement actual UART communication
  2. src/main.rs - Replace placeholder with command routing
  3. src/serial/protocol.rs - Add response parsing logic

🎯 Success Criteria for Phase 2

  • eink-power-cli version returns actual controller version
  • eink-power-cli ping gets "pong" response from controller
  • eink-power-cli battery read shows real LTC2959 data
  • eink-power-cli power pmic on actually controls power
  • JSON output format works with real data
  • Error handling for disconnected/missing controller

💡 Implementation Tips

  1. Start with version command - simplest to implement and test
  2. Use existing Python scripts as reference for expected responses
  3. Test incrementally - deploy and test each command as implemented
  4. Handle controller prompts - wait for debug:~$ or prod:~$
  5. Parse emoji responses - controller uses emojis in output

🚀 Ready to Begin

The project is in perfect state for Phase 2 implementation. All infrastructure, build system, deployment, and CLI framework is complete and working. The only task is implementing the actual serial communication protocol.

Next command: Start implementing src/serial/connection.rs with actual tokio-serial UART communication to replace the placeholder.

📞 Project Contacts