mi mi
first 2016/02 SDFileSystemDMA inherited from Official SDFileSystem.
Dependents: SDFileSystemDMA-test DmdFullRGB_0_1
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SDFileSystemDMA
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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/
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) | ||
| 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) | - | - |
F4
| 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 .