mi mi
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/
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 .
Diff: FATFileSystem/FATFileSystem.cpp
- Revision:
- 34:b065d97cb70f
- Parent:
- 31:cfad42bb789a
--- a/FATFileSystem/FATFileSystem.cpp Mon Aug 29 18:43:57 2016 +0900
+++ b/FATFileSystem/FATFileSystem.cpp Mon Aug 29 20:07:20 2016 +0900
@@ -73,6 +73,9 @@
/* POSIX flags -> FatFS open mode */
BYTE openmode;
+#if _FS_READONLY==1
+ openmode = FA_READ;
+#else
if (flags & O_RDWR) {
openmode = FA_READ|FA_WRITE;
} else if(flags & O_WRONLY) {
@@ -87,6 +90,7 @@
openmode |= FA_OPEN_ALWAYS;
}
}
+#endif
FIL fh;
FRESULT res = f_open(&fh, n, openmode);
@@ -94,37 +98,51 @@
debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
return NULL;
}
+#if !_FS_READONLY
if (flags & O_APPEND) {
f_lseek(&fh, fh.fsize);
}
+#endif
return new FATFileHandle(fh);
}
int FATFileSystem::remove(const char *filename) {
+#if !_FS_READONLY
FRESULT res = f_unlink(filename);
if (res) {
debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
return -1;
}
return 0;
+#else
+ return -1;
+#endif
}
int FATFileSystem::rename(const char *oldname, const char *newname) {
+#if !_FS_READONLY
FRESULT res = f_rename(oldname, newname);
if (res) {
debug_if(FFS_DBG, "f_rename() failed: %d\n", res);
return -1;
}
return 0;
+#else
+ return -1;
+#endif
}
int FATFileSystem::format() {
+#if !_FS_READONLY
FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
if (res) {
debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
return -1;
}
return 0;
+#else
+ return -1;
+#endif
}
DirHandle *FATFileSystem::opendir(const char *name) {
@@ -137,8 +155,12 @@
}
int FATFileSystem::mkdir(const char *name, mode_t mode) {
+#if !_FS_READONLY
FRESULT res = f_mkdir(name);
return res == 0 ? 0 : -1;
+#else
+ return -1;
+#endif
}
int FATFileSystem::mount() {