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

Committer:
mimi3
Date:
Sun Jan 22 23:13:11 2017 +0900
Revision:
38:7077795dbf81
Parent:
10:b48d3ace55db 
change: table.md

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mimi3 10:b48d3ace55db 1 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2014 */
mimi3 10:b48d3ace55db 3 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 4 /* If a working storage control module is available, it should be */
mimi3 10:b48d3ace55db 5 /* attached to the FatFs via a glue function rather than modifying it. */
mimi3 10:b48d3ace55db 6 /* This is an example of glue functions to attach various exsisting */
mimi3 10:b48d3ace55db 7 /* storage control modules to the FatFs module with a defined API. */
mimi3 10:b48d3ace55db 8 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 9
mimi3 10:b48d3ace55db 10 #include "diskio.h"
mimi3 10:b48d3ace55db 11 #include "mbed_debug.h"
mimi3 10:b48d3ace55db 12 #include "FATFileSystem.h"
mimi3 10:b48d3ace55db 13
mimi3 10:b48d3ace55db 14 using namespace mbed;
mimi3 10:b48d3ace55db 15
mimi3 10:b48d3ace55db 16 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 17 /* Get Drive Status */
mimi3 10:b48d3ace55db 18 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 19
mimi3 10:b48d3ace55db 20 DSTATUS disk_status (
mimi3 10:b48d3ace55db 21 BYTE pdrv /* Physical drive nmuber to identify the drive */
mimi3 10:b48d3ace55db 22 )
mimi3 10:b48d3ace55db 23 {
mimi3 10:b48d3ace55db 24 debug_if(FFS_DBG, "disk_status on pdrv [%d]\n", pdrv);
mimi3 10:b48d3ace55db 25 return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_status();
mimi3 10:b48d3ace55db 26 }
mimi3 10:b48d3ace55db 27
mimi3 10:b48d3ace55db 28 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 29 /* Inidialize a Drive */
mimi3 10:b48d3ace55db 30 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 31
mimi3 10:b48d3ace55db 32 DSTATUS disk_initialize (
mimi3 10:b48d3ace55db 33 BYTE pdrv /* Physical drive nmuber to identify the drive */
mimi3 10:b48d3ace55db 34 )
mimi3 10:b48d3ace55db 35 {
mimi3 10:b48d3ace55db 36 debug_if(FFS_DBG, "disk_initialize on pdrv [%d]\n", pdrv);
mimi3 10:b48d3ace55db 37 return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_initialize();
mimi3 10:b48d3ace55db 38 }
mimi3 10:b48d3ace55db 39
mimi3 10:b48d3ace55db 40 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 41 /* Read Sector(s) */
mimi3 10:b48d3ace55db 42 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 43
mimi3 10:b48d3ace55db 44 DRESULT disk_read (
mimi3 10:b48d3ace55db 45 BYTE pdrv, /* Physical drive nmuber to identify the drive */
mimi3 10:b48d3ace55db 46 BYTE* buff, /* Data buffer to store read data */
mimi3 10:b48d3ace55db 47 DWORD sector, /* Sector address in LBA */
mimi3 10:b48d3ace55db 48 UINT count /* Number of sectors to read */
mimi3 10:b48d3ace55db 49 )
mimi3 10:b48d3ace55db 50 {
mimi3 10:b48d3ace55db 51 debug_if(FFS_DBG, "disk_read(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
mimi3 10:b48d3ace55db 52 if (FATFileSystem::_ffs[pdrv]->disk_read((uint8_t*)buff, sector, count))
mimi3 10:b48d3ace55db 53 return RES_PARERR;
mimi3 10:b48d3ace55db 54 else
mimi3 10:b48d3ace55db 55 return RES_OK;
mimi3 10:b48d3ace55db 56 }
mimi3 10:b48d3ace55db 57
mimi3 10:b48d3ace55db 58 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 59 /* Write Sector(s) */
mimi3 10:b48d3ace55db 60 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 61
mimi3 10:b48d3ace55db 62 #if _USE_WRITE
mimi3 10:b48d3ace55db 63 DRESULT disk_write (
mimi3 10:b48d3ace55db 64 BYTE pdrv, /* Physical drive nmuber to identify the drive */
mimi3 10:b48d3ace55db 65 const BYTE* buff, /* Data to be written */
mimi3 10:b48d3ace55db 66 DWORD sector, /* Sector address in LBA */
mimi3 10:b48d3ace55db 67 UINT count /* Number of sectors to write */
mimi3 10:b48d3ace55db 68 )
mimi3 10:b48d3ace55db 69 {
mimi3 10:b48d3ace55db 70 debug_if(FFS_DBG, "disk_write(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
mimi3 10:b48d3ace55db 71 if (FATFileSystem::_ffs[pdrv]->disk_write((uint8_t*)buff, sector, count))
mimi3 10:b48d3ace55db 72 return RES_PARERR;
mimi3 10:b48d3ace55db 73 else
mimi3 10:b48d3ace55db 74 return RES_OK;
mimi3 10:b48d3ace55db 75 }
mimi3 10:b48d3ace55db 76 #endif
mimi3 10:b48d3ace55db 77
mimi3 10:b48d3ace55db 78 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 79 /* Miscellaneous Functions */
mimi3 10:b48d3ace55db 80 /*-----------------------------------------------------------------------*/
mimi3 10:b48d3ace55db 81
mimi3 10:b48d3ace55db 82 #if _USE_IOCTL
mimi3 10:b48d3ace55db 83 DRESULT disk_ioctl (
mimi3 10:b48d3ace55db 84 BYTE pdrv, /* Physical drive nmuber (0..) */
mimi3 10:b48d3ace55db 85 BYTE cmd, /* Control code */
mimi3 10:b48d3ace55db 86 void* buff /* Buffer to send/receive control data */
mimi3 10:b48d3ace55db 87 )
mimi3 10:b48d3ace55db 88 {
mimi3 10:b48d3ace55db 89 debug_if(FFS_DBG, "disk_ioctl(%d)\n", cmd);
mimi3 10:b48d3ace55db 90 switch(cmd) {
mimi3 10:b48d3ace55db 91 case CTRL_SYNC:
mimi3 10:b48d3ace55db 92 if(FATFileSystem::_ffs[pdrv] == NULL) {
mimi3 10:b48d3ace55db 93 return RES_NOTRDY;
mimi3 10:b48d3ace55db 94 } else if(FATFileSystem::_ffs[pdrv]->disk_sync()) {
mimi3 10:b48d3ace55db 95 return RES_ERROR;
mimi3 10:b48d3ace55db 96 }
mimi3 10:b48d3ace55db 97 return RES_OK;
mimi3 10:b48d3ace55db 98 case GET_SECTOR_COUNT:
mimi3 10:b48d3ace55db 99 if(FATFileSystem::_ffs[pdrv] == NULL) {
mimi3 10:b48d3ace55db 100 return RES_NOTRDY;
mimi3 10:b48d3ace55db 101 } else {
mimi3 10:b48d3ace55db 102 DWORD res = FATFileSystem::_ffs[pdrv]->disk_sectors();
mimi3 10:b48d3ace55db 103 if(res > 0) {
mimi3 10:b48d3ace55db 104 *((DWORD*)buff) = res; // minimum allowed
mimi3 10:b48d3ace55db 105 return RES_OK;
mimi3 10:b48d3ace55db 106 } else {
mimi3 10:b48d3ace55db 107 return RES_ERROR;
mimi3 10:b48d3ace55db 108 }
mimi3 10:b48d3ace55db 109 }
mimi3 10:b48d3ace55db 110 case GET_BLOCK_SIZE:
mimi3 10:b48d3ace55db 111 *((DWORD*)buff) = 1; // default when not known
mimi3 10:b48d3ace55db 112 return RES_OK;
mimi3 10:b48d3ace55db 113
mimi3 10:b48d3ace55db 114 }
mimi3 10:b48d3ace55db 115 return RES_PARERR;
mimi3 10:b48d3ace55db 116 }
mimi3 10:b48d3ace55db 117 #endif