The Stellaris logic analyzer is based upon this earlier build that took code from a SUMP comparable Arduino logic analyzer and ported it to the much faster and more capable Stellaris Launchpad ...

The people at CWAV loaned me one of the USBee RX pods that combines an 18-input logic analyzer, 8-output logic pattern/signal generator, and 2-channel scope in a small package that communicates with a ...

Logic analysis is a common tool in FPGA development. If you use Altera, they have Signal Tap available that lets you build a simple logic analyzer into the FPGA that talks back to your PC.