Hiroshi SAKAMOTO / Mbed 2 deprecated _test_SDHCFileSystem

Test program for SDHCFileSystem performance test.

Dependencies:   FatFileSystem mbed

Fork of SDHCFileSystem by Klaus Bu

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

main.cpp

Committer:
xxll
Date:
2010-07-24
Revision:
0:90601632692f
Child:
1:f69b56cac865

File content as of revision 0:90601632692f:

 #include "mbed.h"
 #include "string"
 #include "SDHCFileSystem.h"
 
 SDFileSystem sd(p5, p6, p7, p8, "sd"); // mosi, miso, sclk, cs
   
 int main() {
       
       FILE *fp = fopen("/sd/myfile.txt", "w");
       fprintf(fp, "\n\rHello World!\n\r");
       fclose(fp);
 }