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.cpp@38:7077795dbf81, 2017-01-22 (annotated)

Committer:
mimi3
Date:
Sun Jan 22 23:13:11 2017 +0900
Revision:
38:7077795dbf81
Parent:
34:b065d97cb70f 
change: table.md

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 #include "ff.h"
mimi3 10:b48d3ace55db 23 #include "ffconf.h"
mimi3 10:b48d3ace55db 24 #include "mbed_debug.h"
mimi3 10:b48d3ace55db 25
mimi3 10:b48d3ace55db 26 #include "FATFileHandle.h"
mimi3 10:b48d3ace55db 27
mimi3 10:b48d3ace55db 28 FATFileHandle::FATFileHandle(FIL fh) {
mimi3 10:b48d3ace55db 29 _fh = fh;
mimi3 10:b48d3ace55db 30 }
mimi3 10:b48d3ace55db 31
mimi3 10:b48d3ace55db 32 int FATFileHandle::close() {
mimi3 10:b48d3ace55db 33 int retval = f_close(&_fh);
mimi3 10:b48d3ace55db 34 delete this;
mimi3 10:b48d3ace55db 35 return retval;
mimi3 10:b48d3ace55db 36 }
mimi3 10:b48d3ace55db 37
mimi3 10:b48d3ace55db 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
dinau 34:b065d97cb70f 39 #if !_FS_READONLY
mimi3 10:b48d3ace55db 40 UINT n;
mimi3 10:b48d3ace55db 41 FRESULT res = f_write(&_fh, buffer, length, &n);
mimi3 10:b48d3ace55db 42 if (res) {
mimi3 10:b48d3ace55db 43 debug_if(FFS_DBG, "f_write() failed: %d", res);
mimi3 10:b48d3ace55db 44 return -1;
mimi3 10:b48d3ace55db 45 }
mimi3 10:b48d3ace55db 46 return n;
dinau 34:b065d97cb70f 47 #else
dinau 34:b065d97cb70f 48 return -1;
dinau 34:b065d97cb70f 49 #endif
mimi3 10:b48d3ace55db 50 }
mimi3 10:b48d3ace55db 51
mimi3 10:b48d3ace55db 52 ssize_t FATFileHandle::read(void* buffer, size_t length) {
mimi3 10:b48d3ace55db 53 debug_if(FFS_DBG, "read(%d)\n", length);
mimi3 10:b48d3ace55db 54 UINT n;
mimi3 10:b48d3ace55db 55 FRESULT res = f_read(&_fh, buffer, length, &n);
mimi3 10:b48d3ace55db 56 if (res) {
mimi3 10:b48d3ace55db 57 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
mimi3 10:b48d3ace55db 58 return -1;
mimi3 10:b48d3ace55db 59 }
mimi3 10:b48d3ace55db 60 return n;
mimi3 10:b48d3ace55db 61 }
mimi3 10:b48d3ace55db 62
mimi3 10:b48d3ace55db 63 int FATFileHandle::isatty() {
mimi3 10:b48d3ace55db 64 return 0;
mimi3 10:b48d3ace55db 65 }
mimi3 10:b48d3ace55db 66
mimi3 10:b48d3ace55db 67 off_t FATFileHandle::lseek(off_t position, int whence) {
mimi3 10:b48d3ace55db 68 if (whence == SEEK_END) {
mimi3 10:b48d3ace55db 69 position += _fh.fsize;
mimi3 10:b48d3ace55db 70 } else if(whence==SEEK_CUR) {
mimi3 10:b48d3ace55db 71 position += _fh.fptr;
mimi3 10:b48d3ace55db 72 }
mimi3 10:b48d3ace55db 73 FRESULT res = f_lseek(&_fh, position);
mimi3 10:b48d3ace55db 74 if (res) {
mimi3 10:b48d3ace55db 75 debug_if(FFS_DBG, "lseek failed: %d\n", res);
mimi3 10:b48d3ace55db 76 return -1;
mimi3 10:b48d3ace55db 77 } else {
mimi3 10:b48d3ace55db 78 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
mimi3 10:b48d3ace55db 79 return _fh.fptr;
mimi3 10:b48d3ace55db 80 }
mimi3 10:b48d3ace55db 81 }
mimi3 10:b48d3ace55db 82
mimi3 10:b48d3ace55db 83 int FATFileHandle::fsync() {
dinau 34:b065d97cb70f 84 #if !_FS_READONLY
mimi3 10:b48d3ace55db 85 FRESULT res = f_sync(&_fh);
mimi3 10:b48d3ace55db 86 if (res) {
mimi3 10:b48d3ace55db 87 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
mimi3 10:b48d3ace55db 88 return -1;
mimi3 10:b48d3ace55db 89 }
mimi3 10:b48d3ace55db 90 return 0;
dinau 34:b065d97cb70f 91 #else
dinau 34:b065d97cb70f 92 return -1;
dinau 34:b065d97cb70f 93 #endif
mimi3 10:b48d3ace55db 94 }
mimi3 10:b48d3ace55db 95
mimi3 10:b48d3ace55db 96 off_t FATFileHandle::flen() {
mimi3 10:b48d3ace55db 97 return _fh.fsize;
mimi3 10:b48d3ace55db 98 }