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protocol-analyzer

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Serial protocol analysis and debugging for common embedded interfaces (I2C, SPI, UART)

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Protocol Analyzer Skill

Overview

This skill provides serial protocol analysis and debugging capabilities for common embedded communication interfaces including I2C, SPI, and UART.

Capabilities

I2C Analysis

  • Bus address detection and scanning
  • Transaction decoding and timing
  • NACK handling and error detection
  • Multi-master arbitration analysis
  • Clock stretching detection
  • 7-bit and 10-bit addressing
  • Fast mode and fast mode plus support

SPI Analysis

  • Transaction decoding
  • Mode configuration (CPOL/CPHA)
  • Clock frequency analysis
  • Chip select timing verification
  • Full-duplex data capture
  • Multi-slave configurations

UART Analysis

  • Frame analysis and decoding
  • Baud rate auto-detection
  • Parity and stop bit verification
  • Flow control analysis (RTS/CTS)
  • Break condition detection
  • Error frame identification

Timing Analysis

  • Setup and hold time verification
  • Clock frequency measurement
  • Inter-frame timing analysis
  • Protocol timing compliance
  • Glitch and noise detection

Integration

  • Saleae Logic analyzer integration
  • Sigrok/PulseView support
  • Protocol decoder libraries
  • Export to standard formats

Target Processes

  • device-driver-development.js - Driver debugging and validation
  • hardware-bring-up.js - Initial communication verification
  • signal-integrity-testing.js - Protocol signal analysis
  • bsp-development.js - BSP communication testing

Dependencies

  • Logic analyzer software (Saleae Logic, Sigrok)
  • Protocol decoder libraries
  • Logic analyzer hardware

Usage Context

This skill is invoked when tasks require:

  • Serial protocol debugging
  • Communication timing verification
  • Bus error diagnosis
  • Protocol compliance testing
  • Multi-device communication analysis

Protocol Configurations

I2C Standard Settings

i2c:
  mode: standard | fast | fast_plus | high_speed
  addressing: 7bit | 10bit
  clock_stretching: enabled | disabled

SPI Mode Settings

spi:
  mode: 0 | 1 | 2 | 3  # CPOL/CPHA combinations
  bit_order: msb_first | lsb_first
  word_size: 8 | 16 | 32

UART Settings

uart:
  baud_rate: 9600 | 115200 | etc.
  data_bits: 7 | 8 | 9
  parity: none | even | odd
  stop_bits: 1 | 2