sl-firmware
3a7576939e
STM32 firmware: - safety.h/c: EstopSource enum, safety_remote_estop/clear/get/active() CDC 'E'=ESTOP_REMOTE, 'F'=ESTOP_CELLULAR_TIMEOUT, 'Z'=clear latch - usbd_cdc_if: cdc_estop_request/cdc_estop_clear_request volatile flags - status: status_update() +remote_estop param; both LEDs fast-blink 200ms - main.c: immediate motor cutoff highest-priority; arming gated by !safety_remote_estop_active(); motor estop auto-clear gated; telemetry 'es' field 0-4; status_update() updated to 5 args Safety: IMMEDIATE motor cutoff, latched until explicit Z + DISARMED, cannot re-arm via MQTT alone (requires RC arm hold). IWDG-safe. Jetson bridge: - remote_estop_node.py: paho-mqtt + pyserial, cellular watchdog 5s - estop_params.yaml, remote_estop.launch.py - setup.py / package.xml: register node + paho-mqtt dep - docker-compose.yml: remote-estop service - test_remote_estop.py: kill/clear/watchdog/latency unit tests 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 | STM32F722 (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, STM32)
├── 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.