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

Diff: main.cpp

Revision:
0:90601632692f
Child:
1:f69b56cac865
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Jul 24 19:45:29 2010 +0000
@@ -0,0 +1,12 @@
+ #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);
+ }
\ No newline at end of file