teensy 3.0 SPI with DMA -- nice try

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First of all, many things are currently changing regarding SPI, so I'll have to rework a lot of the DMA SPI driver for teensyduino 1.20 (interrupt vector table in RAM, SPI transactions). Would the more experienced git users recommend doing this in a separate branch?

For the current master branch I'll just add correct saving and restoring of the SPI settings with code taken from my SPI backup class.
 
I'm using the files you posted here, from the post with the wierd ".h" file problem.

Is there a different version I should be using?
 
Well, if this works for you, leave it as it is.

For your next project that uses SPI with DMA, use the library discussed in the thread I linked to.
 
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