mi mi / SDFileSystemDMA Featured

first 2016/02 SDFileSystemDMA inherited from Official SDFileSystem.

Dependents:   SDFileSystemDMA-test DmdFullRGB_0_1

Fork of SDFileSystemDMA by mi mi

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.
(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

BoardSRAMSPI1SPI2SPI3
NUCLEO-F030R88KB(v)
DISCO-F051R88KB(w)
NUCLEO-F031K64KB(f)
NUCLEO-F042K66KB(r)
NUCLEO-F070RB16KB(w)
NUCLEO-F072RB16KB(w)
NUCLEO-F091RC32KB(c)

Cortex-L0

BoardSRAMSPI1SPI2SPI3
DISCO-L053C88KB(c)
NUCLEO-L053R88KB(c)
NUCLEO-L073RZ20KB(c)

Cortex-M3

BoardSRAMSPI1SPI2SPI3
DISCO-F100RB8KB(v)(v)-
BLUEPILL-F103CB20KB(w)(w)-
NUCLEO-F103RB20KB(v)(v)-
NUCLEO-L152RE80KB(v)(w)-
MOTE-L152RC32KB(w)(w)-

Cortex-M4
F3

BoardSRAMSPI1SPI2SPI3
DISCO-F303VC40KB-(v)(v)
NUCLEO-F303RE64KB(w)(w)(w)
NUCLEO-F302R816KB--(c)
NUCLEO-F303K812KB(c)--
DISCO-F334C812KB(c)--
NUCLEO-F334R812KB(c)--

F4

BoardSPI1SPI2SPI3
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 .

FATFileSystem/FATFileHandle.h@10:b48d3ace55db, 2016-02-14 (annotated)

Committer:
mimi3
Date:
Sun Feb 14 21:58:51 2016 +0900
Revision:
10:b48d3ace55db
added: FATFileSystem

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mimi3 10:b48d3ace55db 1 /* mbed Microcontroller Library
mimi3 10:b48d3ace55db 2 * Copyright (c) 2006-2012 ARM Limited
mimi3 10:b48d3ace55db 3 *
mimi3 10:b48d3ace55db 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mimi3 10:b48d3ace55db 5 * of this software and associated documentation files (the "Software"), to deal
mimi3 10:b48d3ace55db 6 * in the Software without restriction, including without limitation the rights
mimi3 10:b48d3ace55db 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mimi3 10:b48d3ace55db 8 * copies of the Software, and to permit persons to whom the Software is
mimi3 10:b48d3ace55db 9 * furnished to do so, subject to the following conditions:
mimi3 10:b48d3ace55db 10 *
mimi3 10:b48d3ace55db 11 * The above copyright notice and this permission notice shall be included in
mimi3 10:b48d3ace55db 12 * all copies or substantial portions of the Software.
mimi3 10:b48d3ace55db 13 *
mimi3 10:b48d3ace55db 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mimi3 10:b48d3ace55db 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mimi3 10:b48d3ace55db 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mimi3 10:b48d3ace55db 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mimi3 10:b48d3ace55db 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mimi3 10:b48d3ace55db 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mimi3 10:b48d3ace55db 20 * SOFTWARE.
mimi3 10:b48d3ace55db 21 */
mimi3 10:b48d3ace55db 22 #ifndef MBED_FATFILEHANDLE_H
mimi3 10:b48d3ace55db 23 #define MBED_FATFILEHANDLE_H
mimi3 10:b48d3ace55db 24
mimi3 10:b48d3ace55db 25 #include "FileHandle.h"
mimi3 10:b48d3ace55db 26
mimi3 10:b48d3ace55db 27 using namespace mbed;
mimi3 10:b48d3ace55db 28
mimi3 10:b48d3ace55db 29 class FATFileHandle : public FileHandle {
mimi3 10:b48d3ace55db 30 public:
mimi3 10:b48d3ace55db 31
mimi3 10:b48d3ace55db 32 FATFileHandle(FIL fh);
mimi3 10:b48d3ace55db 33 virtual int close();
mimi3 10:b48d3ace55db 34 virtual ssize_t write(const void* buffer, size_t length);
mimi3 10:b48d3ace55db 35 virtual ssize_t read(void* buffer, size_t length);
mimi3 10:b48d3ace55db 36 virtual int isatty();
mimi3 10:b48d3ace55db 37 virtual off_t lseek(off_t position, int whence);
mimi3 10:b48d3ace55db 38 virtual int fsync();
mimi3 10:b48d3ace55db 39 virtual off_t flen();
mimi3 10:b48d3ace55db 40
mimi3 10:b48d3ace55db 41 protected:
mimi3 10:b48d3ace55db 42
mimi3 10:b48d3ace55db 43 FIL _fh;
mimi3 10:b48d3ace55db 44
mimi3 10:b48d3ace55db 45 };
mimi3 10:b48d3ace55db 46
mimi3 10:b48d3ace55db 47 #endif