sl-controls
fda6ab99ff
Update CAN and serial bridge code to match authoritative protocol spec from docs/SAUL-TEE-SYSTEM-REFERENCE.md §5-6 (hal, 2026-04-04). mamba_protocol.py (CAN, Orin ↔ ESP32 BALANCE): - 0x300 DRIVE: [speed:i16][steer:i16][mode:u8][flags:u8][_:u16] — combined frame - 0x301 ARM: [arm:u8] - 0x302 PID: [kp:f16][ki:f16][kd:f16][_:u16] — half-float gains - 0x303 ESTOP: [0xE5] — magic byte cut - 0x400 ATTITUDE: [pitch:f16][speed:f16][yaw_rate:f16][state:u8][flags:u8] - 0x401 BATTERY: [vbat_mv:u16][fault_code:u8][rssi:i8] - Add VESC STATUS1/4/5 decode helpers; VESC IDs 56 (left) / 68 (right) can_bridge_node.py: - /cmd_vel → encode_drive_cmd (speed/steer int16, MODE_DRIVE) - /estop → encode_estop_cmd (magic 0xE5); clear → DISARM - /saltybot/arm → encode_arm_cmd (new subscription) - Watchdog sends DRIVE(0,0,MODE_IDLE) when /cmd_vel silent - ATTITUDE (0x400) → /saltybot/attitude + /saltybot/balance_state JSON - BATTERY (0x401) → /can/battery BatteryState - VESC STATUS1 frames → /can/vesc/left|right/state stm32_cmd_node.py — rewritten for inter-board protocol API: - Imports from updated stm32_protocol (BAUD_RATE=460800, new frame types) - RX: RcChannels → /saltybot/rc_channels, SensorData → /saltybot/sensors - TX: encode_led_cmd, encode_output_cmd from /saltybot/leds + /saltybot/outputs - HEARTBEAT (0x20) timer replaces old SPEED_STEER/ARM logic stm32_cmd_params.yaml: serial_port=/dev/esp32-io, baud=460800 stm32_cmd.launch.py: updated defaults and description Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Jetson Nano — AI/SLAM Platform Setup
Self-balancing robot: Jetson Nano dev environment for ROS2 Humble + SLAM stack.
Stack
| Component | Version / Part |
|---|---|
| Platform | Jetson Nano 4GB |
| JetPack | 4.6 (L4T R32.6.1, CUDA 10.2) |
| ROS2 | Humble Hawksbill |
| DDS | CycloneDDS |
| SLAM | slam_toolbox |
| Nav | Nav2 |
| Depth camera | Intel RealSense D435i |
| LiDAR | RPLIDAR A1M8 |
| MCU bridge | ESP32 (USB CDC @ 921600) |
Quick Start
# 1. Host setup (once, on fresh JetPack 4.6)
sudo bash scripts/setup-jetson.sh
# 2. Build Docker image
bash scripts/build-and-run.sh build
# 3. Start full stack
bash scripts/build-and-run.sh up
# 4. Open ROS2 shell
bash scripts/build-and-run.sh shell
Docs
docs/pinout.md— GPIO/I2C/UART pinout for all peripheralsdocs/power-budget.md— 10W power envelope analysis
Files
jetson/
├── Dockerfile # L4T base + ROS2 Humble + SLAM packages
├── docker-compose.yml # Multi-service stack (ROS2, RPLIDAR, D435i, ESP32 BALANCE)
├── README.md # This file
├── docs/
│ ├── pinout.md # GPIO/I2C/UART pinout reference
│ └── power-budget.md # Power budget analysis (10W envelope)
└── scripts/
├── entrypoint.sh # Docker container entrypoint
├── setup-jetson.sh # Host setup (udev, Docker, nvpmodel)
└── build-and-run.sh # Build/run helper
Power Budget (Summary)
| Scenario | Total |
|---|---|
| Idle | 2.9W |
| Nominal (SLAM active) | ~10.2W |
| Peak | 15.4W |
Target: 10W (MAXN nvpmodel). Use RPLIDAR standby + 640p D435i for compliance.
See docs/power-budget.md for full analysis.