I second this recommendation... I bought one nearly 3? years ago, didn't 
use it once until 2 weeks ago, but for debugging my newbie crude (and 
that's being generous) VHDL it has been great.  Does CAN, I2C, SPI, 
serial.  I've only used the SPI.  The configuration of what signal is 
what, special ignore-first-bit type things, and the display format is 
pretty flexible.

I can see how it would be useful for firmware debugging of serial rx/tx 
and other miscellany.  For FPGA work it is a must-have.

J


Brian Harris wrote:
> I use this as a logic analyser and for serial and  SPI interpreting 
> almost daily:
> http://www.pctestinstruments.com/
> 
> It revolutionized my work.
> More useful and easier than debuggers.
> Worth a look and <$400
> You can download the software and run demos.
> 
> Brian Harris
> 
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