The Professional Perfectionists / Mbed 2 deprecated Test_SD_Card

Opens/Creates txt file, writes to it, then prints to terminal from it

Dependencies:   SDFileSystem mbed

Fork of FTF2014_lab4 by Freescale

main.cpp@3:deefd66fdc9e, 2015-03-04 (annotated)

Committer:
joshwilkins2013
Date:
Wed Mar 04 00:32:29 2015 +0000
Revision:
3:deefd66fdc9e
Parent:
0:a83db87be46c 
Simple SD card test outputing floats in a loop

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Kojto 0:a83db87be46c 1 #include "mbed.h"
Kojto 0:a83db87be46c 2 #include "SDFileSystem.h"
Kojto 0:a83db87be46c 3
Kojto 0:a83db87be46c 4 SDFileSystem sd(PTE3, PTE1, PTE2, PTE4, "sd"); // MOSI, MISO, SCK, CS
joshwilkins2013 3:deefd66fdc9e 5
Kojto 0:a83db87be46c 6 Serial pc(USBTX, USBRX);
joshwilkins2013 3:deefd66fdc9e 7
joshwilkins2013 3:deefd66fdc9e 8 FILE *Data; // Creates name of file
joshwilkins2013 3:deefd66fdc9e 9 char buffer[1024]; // Buffer size (# of characters)
Kojto 0:a83db87be46c 10
Kojto 0:a83db87be46c 11 int main() {
Kojto 0:a83db87be46c 12 pc.printf("Initializing \n");
joshwilkins2013 3:deefd66fdc9e 13
joshwilkins2013 3:deefd66fdc9e 14 float x = 214;
joshwilkins2013 3:deefd66fdc9e 15 double y = 200;
joshwilkins2013 3:deefd66fdc9e 16
joshwilkins2013 3:deefd66fdc9e 17 Data = fopen("/sd/Data.txt", "r"); // Opens file if it exists, r means read
joshwilkins2013 3:deefd66fdc9e 18 if (Data != NULL) remove("/sd/Data.txt"); // If it does close it then remove it
joshwilkins2013 3:deefd66fdc9e 19 fclose(Data);
joshwilkins2013 3:deefd66fdc9e 20
joshwilkins2013 3:deefd66fdc9e 21 Data = fopen("/sd/Data.txt", "w"); // w means write
joshwilkins2013 3:deefd66fdc9e 22 for(int i=0; i<4; i++){
joshwilkins2013 3:deefd66fdc9e 23 if (Data == NULL) pc.printf("Unable to write the file \n\r"); // This chunk for writing to file on SD card
joshwilkins2013 3:deefd66fdc9e 24 else fprintf(Data, "%f\t%f\n",x,y); // can read float or double not int (only checked these three types)
joshwilkins2013 3:deefd66fdc9e 25 x++;
joshwilkins2013 3:deefd66fdc9e 26 y--;
Kojto 0:a83db87be46c 27 }
joshwilkins2013 3:deefd66fdc9e 28 fclose(Data);
joshwilkins2013 3:deefd66fdc9e 29
joshwilkins2013 3:deefd66fdc9e 30 Data = fopen("/sd/Data.txt", "r");
joshwilkins2013 3:deefd66fdc9e 31 if (Data != NULL) {
joshwilkins2013 3:deefd66fdc9e 32 int size = fread(buffer, sizeof(char), 1024, Data); // This chunk for reading the file on the SD card
joshwilkins2013 3:deefd66fdc9e 33 printf("%s\n", buffer); // can read float or double not int (only checked these three types)
Kojto 0:a83db87be46c 34 }
joshwilkins2013 3:deefd66fdc9e 35 fclose(Data);
Kojto 0:a83db87be46c 36 }