polpla/Maple-SDFat-DMA — pull request #1 by timbresmith (2012-08-03 10:13:17+00:00)
Title: DMA writes

A couple of months ago, manitou posted [these changes to Sd2Card.cpp](http://pastebin.com/raw.php?i=AxSGGxDb) on the leaflabs forum, along with [some nice benchmarks](http://forums.leaflabs.com/topic.php?id=1075&page=2#post-10914) which showed 17.8 mbps read/write speeds (unconnected).

I tested this with a modified version of [this example (ADC_SD_Write.pde)](http://thesolarpowerexpert.com/images/maple/ADC_SD_Write.pde) and was able to initialize the sd card, open the file system, read and write successfully. I have yet to push the limits, but it seems to be basically working!