SDFileSystemDMA - first 2016/02 SDFileSystemDMA inherited from Offi…

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first 2016/02 SDFileSystemDMA inherited from Official SDFileSystem.

Dependents: SDFileSystemDMA-test DmdFullRGB_0_1

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

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.
(r): Only read mode. (when _FS_READONLY==1)
(u) Under construction
(z): Dose not work.

Caution

If your board has SRAM less than or equal to 8KB, the buffer size must be set to 512 Bytes.

Supported Boards:
Cortex-M0

Board	SRAM	SPI1	SPI2	SPI3
NUCLEO-F030R8	8KB	(v)
DISCO-F051R8	8KB	(w)
~~NUCLEO-F031K6~~	4KB	(f)
NUCLEO-F042K6	6KB	(r)
NUCLEO-F070RB	16KB	(w)
NUCLEO-F072RB	16KB	(w)
NUCLEO-F091RC	32KB	(c)

Cortex-L0

Board	SRAM	SPI1	SPI2	SPI3
DISCO-L053C8	8KB	(c)
NUCLEO-L053R8	8KB	(c)
NUCLEO-L073RZ	20KB	(c)

Cortex-M3

Board	SRAM	SPI1	SPI2	SPI3
DISCO-F100RB	8KB	(v)	(v)	-
BLUEPILL-F103CB	20KB	(w)	(w)	-
NUCLEO-F103RB	20KB	(v)	(v)	-
NUCLEO-L152RE	80KB	(v)	(w)	-
MOTE-L152RC	32KB	(w)	(w)	-

Cortex-M4
F3

Board	SRAM	SPI1	SPI2	SPI3
DISCO-F303VC	40KB	-	(v)	(v)
NUCLEO-F303RE	64KB	(w)	(w)	(w)
NUCLEO-F302R8	16KB	-	-	(c)
NUCLEO-F303K8	12KB	(c)	-	-
DISCO-F334C8	12KB	(c)	-	-
NUCLEO-F334R8	12KB	(c)	-	-

Board	SPI1	SPI2	SPI3
ELMO-F411RE	(w)	-	(w)
MTS-MDOT-F411RE	(u)	-	(u)
MTS-DRAGONFLY-F411RE	(w)	-	(w)
NUCLEO-F411RE	(v)	-	(v)
NUCLEO-F401RE	(w)	-	(w)
MTS-MDOT-F405RG	(u)	-	(u)
NUCLEO-F410RB	(c)	-	(c)
NUCLEO-F446RE	(c)	-	(c)
NUCLEO-F429ZI	(c)	-	(c)
B96B-F446VE	(c)	-	(c)
NUCLEO-F446ZE	(c)	-	(c)
DISCO-F429ZI	(u)	-	(u)
DISCO-F469NI	(c)	-	(c)

Information

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 .