A screencast showing how to run the Logic Analyzer under Linux was added to the tutorials section.

The "Sump" Logic Analyzer supports 32 channels with 4K sample memory up to 100MHz. The included Java client application allows waveform exploration as well as SPI and I2C protocol analysis. The project is optimized to run on the Butterfly Platform hardware.

• 4K sample memory (expandable in future designs)
• 32 channels sampling at 100MHz
• 16 channels sampling at 200MHz (experimental)
• Four stage serial and parallel triggering
• External clock input
• Noise filter
• RLE built into the hardware to make the most of available memory.
• SPI protocol analysis (SPI debugger)
• I2C protocol analysis (I2C debugger)
• UART protocol analysis (UART debugger)
• State Analysis

• Completely Open Source hardware and software with development communities working on new functionality.
• Since the Logic Analyzer is built on very flexible FPGA technology it is not limited to being a Logic Analyzer. Future projects that will be supported by the same "Butterfly Light" hardware include:
  • Flash Programmer
  • Oscilloscope
  • Variable Power Supply

• The FPGA can only sample 1.2V, 2.5V, and 3.3V. Any higher voltages can damage the input pins of the FPGA. Given time a plugin board will be developed to address this issue.
• Operation above 100MHz is not well tested.

The Logic Analyzer runs on the Open Source Butterfly Platform hardware which is a modular circuit design that stacks together to provide the required functionality. The minimum hardware needed for the Logic Analyzer is the "Butterfly Light" combination that provides the following capabilities:

• Xilinx FPGA Spartan 3E Cocoon
  • Xilinx XC3S250E Spartan 3E FPGA with 250K Capacity.
  • 8MHz Oscillator
  • Two separate I/O banks with selectable voltage levels of 1.2V, 2.5V, and 3.3V
• Butterfly Platform USB Cocoon
  • Two channel USB controller based on the FTDI FT2232.
    • Provides JTAG programming for FPGA chips.
    • Provides UART compatible communication channel.
  • Power provided by the USB connector.
  • Three power supplies for 1.2V, 2.5V, and 3.3V

The "Butterfly Light" hardware combination can be purchased at the Gadget Factory shop.

• Current Release including the latest CVS Java client, Windows Butterfly Light loader, and Linux Butterfly Light loader.

• Table showing how inputs are connected to Butterfly Light board.

• All tutorials (Best Quality)
• Logic Analyzer Quickstart Screencast for Windows
  
• Logic Analyzer Quickstart Screencast for Linux
  
• Logic Analyzer Cursor and RLE Demo Screencast

Oakmicros User Guide - While looking at their User Guide please take a moment to look at the offerings on their website.

Hardware

"Butterfly Light"


Software

• Michael Poppitz was the original author of this great Logic Analyzer design. He wrote the original VHDL and Java client and released it GPL at http://www.sump.org/projects/analyzer/. Please visit his website for more information.
• Jonas Diemer took the original design and ported it to the Spartan 3E by utilizing BRAM instead of SRAM he also integrated a RLE into the design. His source can be downloaded here.
• The very latest development for the Java client is hosted on SourceForge here.
• OakMicros has created a very nice tutorial for the Java client here. They also offer a nice buffer card to allow any Voltage level to be sampled. It is not currently compatible with the Butterfly Platform but watch for an adapter in the future.