Hiroshi SAKAMOTO
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@0:90601632692f, 2010-07-24 (annotated)
- Committer:
- xxll
- Date:
- Sat Jul 24 19:45:29 2010 +0000
- Revision:
- 0:90601632692f
- Child:
- 1:f69b56cac865
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| xxll | 0:90601632692f | 1 | #include "mbed.h" |
| xxll | 0:90601632692f | 2 | #include "string" |
| xxll | 0:90601632692f | 3 | #include "SDHCFileSystem.h" |
| xxll | 0:90601632692f | 4 | |
| xxll | 0:90601632692f | 5 | SDFileSystem sd(p5, p6, p7, p8, "sd"); // mosi, miso, sclk, cs |
| xxll | 0:90601632692f | 6 | |
| xxll | 0:90601632692f | 7 | int main() { |
| xxll | 0:90601632692f | 8 | |
| xxll | 0:90601632692f | 9 | FILE *fp = fopen("/sd/myfile.txt", "w"); |
| xxll | 0:90601632692f | 10 | fprintf(fp, "\n\rHello World!\n\r"); |
| xxll | 0:90601632692f | 11 | fclose(fp); |
| xxll | 0:90601632692f | 12 | } |