Bus Pirate Logic, SPI, I2C Protocol Analyzer

SparkFun Bus Pirate Logic, SPI, I2C Protocol Analyzer
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Model: BUSPIRATE
Manufacturer: SparkFun
Average Rating: 5 out of 5 Stars!

SparkFun

The Bus Pirate is a Logic and Protocol Analyzer from Sparkfun which can analyze I2C, SPI, JTAG, MIDI, HD44780 LCD and other protocols. With the free LogicSniffer software, this has to be the cheapest analyzer around.

The Bus Pirate, created by Ian Lesnet and featured on Hack a Day, is a troubleshooting tool that communicates between a PC and any embedded device over most standard serial protocols, which include I2C, SPI, and asynchronous serial - all at voltages from 0-5.5VDC. This product eliminates a ton of early prototyping effort when working with new or unknown chips.

These boards are loaded with the latest bootloader and firmware. Currently these are

  • Bootloader V4.4
  • Firmware V5.10
  • Board V3

Note: This is the board only. Also check out the Bus Pirate Cables and Test Hooks

The Bus Pirate can be used either as a Protocol analyzer by using the LogicSniffer software (see downloads at bottom of page) or can be used to send data to a device by typeing commands into a terminal on your computer, those commands are interpreted by the Bus Pirate and sent via the proper protocol. The Bus Pirate will also interpret data sent from your embedded device back to your computer terminal. A big bonus is the bootloader installed on the PIC, which allows you to easily update the firmware and change the functionality of the board.

The main components of the Bus Pirate are PIC24FJ64 processor and an FT232RL USB-to-Serial chip. A Mini-B USB connector is populated on the board, and when you plug it into your computer it will come up as a virtual COM port.

The Bus Pirate can be used with the open source Logic Sniffer Software to give you a 5 channel Logic Analyzer tool that can help you debug Serial, Logic, I2C, SPI and other protocols.

LogicSniffer showing captured data

Logic Analyzer Software

 

LogicSniffer showing decoded I2C analysis

Logic Analyzer showing I2C decode

 

Bus Pirate and Logic Sniffer Video

Features:

  • Supported protocols:
    • 1-Wire
    • I2C
    • SPI
    • JTAG
    • Asynchronous serial
    • MIDI
    • PC keyboard
    • HD44780 LCD
    • 2- and 3-wire libraries with bitwise pin control
    • Scriptable binary bitbang, 1-Wire, I2C, SPI, and UART modes
  • 0-5.5volt tolerant pins
  • 0-6volt measurement probe
  • 1Hz - 40MHz frequency measurement
  • 1kHz - 4MHz pulse-width modulator, frequency generator
  • On-board multi-voltage pull-up resistors
  • On-board 3.3volt and 5volt power supplies with software reset
  • Macros for common operations
  • Bus traffic sniffers (SPI, I2C)
  • A bootloader for easy firmware updates
  • Transparent USB->serial mode
  • 10Hz - 1MHz low-speed logic analyzer
  • Scriptable from Perl, Python, etc.
  • Translations (currently Spanish and Italian)
  • Enumerates as a virtual COM port over USB
  • Can operate as AVR STK v2 clone programmer
  • Access to PIC24FJ64 ICSP programming port

Dimensions: 2.10 x 1.20" (53 x 30mm)

Documents:

 

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Bus Pirate Logic, SPI, I2C Protocol Analyzer
Click to enlarge
Bus Pirate Logic, SPI, I2C Protocol Analyzer
Click to enlarge
Bus Pirate Logic, SPI, I2C Protocol Analyzer
Click to enlarge
Bus Pirate Logic, SPI, I2C Protocol Analyzer
Click to enlarge
Bus Pirate Logic, SPI, I2C Protocol Analyzer
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