can-bus

CAN Bus Skill

Overview

This skill provides comprehensive CAN and CAN-FD bus analysis, development, and debugging capabilities for automotive and industrial embedded systems.

Capabilities

Message Frame Operations

• CAN message frame generation
• Frame analysis and decoding
• Identifier filtering and masking
• Standard (11-bit) and extended (29-bit) IDs
• Remote frame handling

DBC File Support

• DBC file parsing and generation
• Signal decoding and encoding
• Message definition management
• Physical value scaling
• Multiplexed signal support

Protocol Support

• CAN 2.0A/B compliance
• CAN-FD configuration and validation
• J1939 transport protocol
• CANopen communication
• UDS (ISO 14229) diagnostics
• ISO-TP (ISO 15765-2)

Bus Analysis

• Bus arbitration analysis
• Error frame detection and analysis
• Bus-off recovery monitoring
• Bus load calculation
• Bit timing verification
• Network topology analysis

Gateway Operations

• Message routing configuration
• Gateway bridge setup
• Protocol translation
• Filtering and forwarding rules

Target Processes

• device-driver-development.js - CAN driver implementation
• signal-integrity-testing.js - CAN bus signal validation
• hw-sw-interface-specification.js - CAN interface definition
• functional-safety-certification.js - CAN safety requirements

Dependencies

• CAN interface tools (PEAK, Vector, Kvaser)
• DBC files for signal decoding
• CAN analyzer hardware
• SocketCAN (Linux)

Usage Context

This skill is invoked when tasks require:

• CAN driver development
• Bus communication debugging
• DBC-based signal analysis
• Protocol stack implementation
• Automotive networking

Configuration Examples

CAN Bit Timing

can:
  bitrate: 500000  # 500 kbps
  sample_point: 87.5
  sjw: 1
  seg1: 13
  seg2: 2
  prescaler: 4

CAN-FD Configuration

can_fd:
  nominal_bitrate: 500000
  data_bitrate: 2000000
  brs: enabled  # Bit Rate Switch
  esi: enabled  # Error State Indicator

DBC Signal Definition

BO_ 0x123 EngineData: 8 ECU
 SG_ EngineRPM : 0|16@1+ (0.25,0) [0|16383.75] "rpm" Vector__XXX
 SG_ EngineTemp : 16|8@1+ (1,-40) [-40|215] "C" Vector__XXX