Nice! Thanks!
Also noticed that the Stellaris Launchpad has been marked down to only $7.99. As far as I can tell, this chip (though maybe not the LaunchPad board) is identical to the Tiva C one, just renamed since TI is abandoning the Stellaris brand. I only found this out trying to find *documentation* for my existing Stellaris board and finding it all missing and links to the Tiva processor. Anyway, they're similar enough that maybe you want 3 instead of 2
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Nope, the newer Tiva C launchpad is using higher spec core TM4C123GH6PM which is equivalent to LM4F230H5QR (older Stellaris naming), which has the dedicated hardware based quadrature encoder interface (QEI) and PWM modules, while the old Stellaris Launchpad is using the dumbed down LM4F120H5QR which do not have these.

You will not get these below highlighted so called "Motion Control" sections (QEI & PWM) at Stellaris Launchpad and thats the reason TI slashed the price of Stellaris Launchpad, also they are "ALL" still using non final (RTM) chip.
Edit : Almost forgot, the Tiva C mcu USB supports full Host/Device/OTG modes while the Stellaris's mcu does not.

