Andrew Tergis / Mbed 2 deprecated SDFileSystem_test

This is a simple benchmark of the SDFileSystem module. This will attempt to write bytes to the SD card, and will time the operation and display the bits/sec.

Dependencies:   mbed

main.cpp@0:5e7c5b7321c9, 2011-02-14 (annotated)

Committer:
theterg
Date:
Mon Feb 14 22:12:09 2011 +0000
Revision:
0:5e7c5b7321c9
1/14/10

Who changed what in which revision?

UserRevisionLine numberNew contents of line
theterg 0:5e7c5b7321c9 1 #include "mbed.h"
theterg 0:5e7c5b7321c9 2
theterg 0:5e7c5b7321c9 3 #include "SDFileSystem.h"
theterg 0:5e7c5b7321c9 4
theterg 0:5e7c5b7321c9 5 Serial pc(USBTX, USBRX); // tx, rx
theterg 0:5e7c5b7321c9 6 Serial device(p28, p27); // tx, rx
theterg 0:5e7c5b7321c9 7 DigitalOut myled(LED4);
theterg 0:5e7c5b7321c9 8 SDFileSystem sd(p11, p12, p13, p14, "sd");
theterg 0:5e7c5b7321c9 9
theterg 0:5e7c5b7321c9 10 long before;
theterg 0:5e7c5b7321c9 11 long after;
theterg 0:5e7c5b7321c9 12 char samp[3];
theterg 0:5e7c5b7321c9 13 char buff[100];
theterg 0:5e7c5b7321c9 14 Timer t;
theterg 0:5e7c5b7321c9 15
theterg 0:5e7c5b7321c9 16 int getSample();
theterg 0:5e7c5b7321c9 17 void flush();
theterg 0:5e7c5b7321c9 18
theterg 0:5e7c5b7321c9 19 int main() {
theterg 0:5e7c5b7321c9 20 FILE *header;
theterg 0:5e7c5b7321c9 21
theterg 0:5e7c5b7321c9 22 pc.baud(19200);
theterg 0:5e7c5b7321c9 23 device.baud(9600);
theterg 0:5e7c5b7321c9 24
theterg 0:5e7c5b7321c9 25 while(1) {
theterg 0:5e7c5b7321c9 26 memset(buff,'\0',10);
theterg 0:5e7c5b7321c9 27 pc.printf("\r\nHow many bits would you like to test? ");
theterg 0:5e7c5b7321c9 28 char temp = '\0';
theterg 0:5e7c5b7321c9 29 char idx = 0;
theterg 0:5e7c5b7321c9 30 while (temp != '\r'){
theterg 0:5e7c5b7321c9 31 temp = pc.getc();
theterg 0:5e7c5b7321c9 32 buff[idx] = temp;
theterg 0:5e7c5b7321c9 33 pc.putc(temp);
theterg 0:5e7c5b7321c9 34 idx++;
theterg 0:5e7c5b7321c9 35 }
theterg 0:5e7c5b7321c9 36 long num = atol(buff);
theterg 0:5e7c5b7321c9 37 pc.printf("testing %d bits",num);
theterg 0:5e7c5b7321c9 38 t.start();
theterg 0:5e7c5b7321c9 39 header = fopen("/sd/config.txt","w");
theterg 0:5e7c5b7321c9 40 myled = 1;
theterg 0:5e7c5b7321c9 41 before = t.read_us();
theterg 0:5e7c5b7321c9 42 unsigned char val = 0;
theterg 0:5e7c5b7321c9 43 for (unsigned long i=0;i<num;i++){
theterg 0:5e7c5b7321c9 44 fputc(val,header);
theterg 0:5e7c5b7321c9 45 val++;
theterg 0:5e7c5b7321c9 46 }
theterg 0:5e7c5b7321c9 47 after = t.read_us();
theterg 0:5e7c5b7321c9 48 fclose(header);
theterg 0:5e7c5b7321c9 49 myled = 0;
theterg 0:5e7c5b7321c9 50 pc.printf("\r\nIt took %d microseconds to write %d\r\n",(after-before),num);
theterg 0:5e7c5b7321c9 51 pc.printf("aka, a rate of %f bits/sec\r\n",(float)num/((float)(after-before)/1000000));
theterg 0:5e7c5b7321c9 52 }
theterg 0:5e7c5b7321c9 53 }