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first 2016/02 SDFileSystemDMA inherited from Official SDFileSystem.

Dependents:   SDFileSystemDMA-test DmdFullRGB_0_1

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SDFileSystemDMA is enhanced SDFileSystem library for STM32 micros by using DMA functionality.
Max read transfer rate reaches over 2MByte/sec at 24MHz SPI clock if enough read buffer size is set.
Even though minimum read buffer size (512Byte) is set, read transfer rate will reach over 1MByte/sec at 24MHz SPI Clock.
( but depends on the ability of each SD card)

Test program is here.
https://developer.mbed.org/users/mimi3/code/SDFileSystemDMA-test/

/media/uploads/mimi3/sdfilesystemdma-speed-test3-read-buffer-512byte.png

/media/uploads/mimi3/sdfilesystemdma-speed-test-buffer-vs-spi-clock-nucleo-f411re-96mhz.png

Supported SPI port is shown below table.

(v): Verified. It works well.
(w): Probably it will work well. (not tested)
(c): Only compiled. (not tested)
(f): Over flash.
(u) Under construction
(z): Dose not work.

Supported Boards:
Cortex-M0

BoardSPI1SPI2SPI3
NUCLEO-F030R8(v)
DISCO-F051R8(w)
NUCLEO-F031K6(f)
NUCLEO-F042K6(f)
NUCLEO-F070RB(w)
NUCLEO-F072RB(w)
NUCLEO-F091RC(c)

Cortex-L0

BoardSPI1SPI2SPI3
DISCO-L053C8(c)
NUCLEO-L053R8(c)
NUCLEO-L073RZ(c)

Cortex-M3

BoardSPI1SPI2SPI3
DISCO-F100RB(v)(v)-
NUCLEO-F103RB(v)(v)-
NUCLEO-L152RE(v)(w)-

Cortex-M4 F3

BoardSPI1SPI2SPI3
DISCO-F303VC-(v)(v)
NUCLEO-F303RE(w)(w)(w)
NUCLEO-F302R8-(C)
NUCLEO-F303K8(c)--
DISCO-F334C8(c)--
NUCLEO-F334R8(c)--

F4

BoardSPI1SPI2SPI3
NUCLEO-F411RE(v)-(v)
NUCLEO-F401RE(w)-(w)
NUCLEO-F410RB(c)-(c)
NUCLEO-F446RE(c)-(c)
NUCLEO-F429ZI(c)--
NUCLEO-F446ZE(c)--

Note
This library is set to use "short file name" in SDFileSystemDMA/FATFileSystem/ChaN/ffconf.h . ( _USE_LFN=0)
You can change this option to _USE_LFN=1 .

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