Test program for SDHCFileSystem performance test.
Dependencies: FatFileSystem mbed
Fork of SDHCFileSystem by
SDHCFileSystem performance test.
Using SDHCFileSystem/FatFileSystem via fopen()/fwrite()/fclose() . With simple code of reading/writing (fgets()/fputs()) text file.
in performance test of fwrite()
- File size is changeable
- Block size is changeable
- SPI Frequency of SDHCFileSytesm is changeable
You can change SPI Frequency by changing the SDHC_SPI_FREQUENCY in SDHCFileSystem.h
// spi frequency (Hz) 100000->100kHz #define SDHC_SPI_FREQUENCY 2000000
performance test funcion
in main.cpp
void speedtest(char *path, int totallen, int blocklen, bool unlinkfile);
- path
- full path of the file
- totallen
- total length (byte) of test data
- blocklen
- length (byte) of the data writing once by fwrite()
- unlinkfile
- true->remove the file as ending this function
SDHCFileSystem.h
- Committer:
- hayashiisme
- Date:
- 2013-02-14
- Revision:
- 1:f69b56cac865
- Parent:
- 0:90601632692f
File content as of revision 1:f69b56cac865:
/* mbed SDFileSystem Library, for providing file access to SD cards * Copyright (c) 2008-2010, sford * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #ifndef MBED_SDHCFILESYSTEM_H #define MBED_SDHCFILESYSTEM_H #include "mbed.h" #include "FATFileSystem.h" // spi frequency (Hz) 100000->100kHz #define SDHC_SPI_FREQUENCY 2000000 /* Double Words */ typedef unsigned long long uint64_t; typedef long long sint64_t; /** Access the filesystem on an SD Card using SPI * * @code * #include "mbed.h" * #include "SDFileSystem.h" * * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs * * int main() { * FILE *fp = fopen("/sd/myfile.txt", "w"); * fprintf(fp, "Hello World!\n"); * fclose(fp); * } */ class SDFileSystem : public FATFileSystem { public: /** Create the File System for accessing an SD Card using SPI * * @param mosi SPI mosi pin connected to SD Card * @param miso SPI miso pin conencted to SD Card * @param sclk SPI sclk pin connected to SD Card * @param cs DigitalOut pin used as SD Card chip select * @param name The name used to access the virtual filesystem */ SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name); virtual int disk_initialize(); virtual int disk_write(const char *buffer, int block_number); virtual int disk_read(char *buffer, int block_number); virtual int disk_status(); virtual int disk_sync(); virtual int disk_sectors(); protected: int _cmd(int cmd, int arg); int _cmdx(int cmd, int arg); int _cmd8(); int _cmd58(); int initialise_card(); int initialise_card_v1(); int initialise_card_v2(); int _read(char *buffer, int length); int _write(const char *buffer, int length); int _sd_sectors(); int _sectors; SPI _spi; DigitalOut _cs; int cdv; }; #endif