Ben Trevett / Mbed 2 deprecated SD_ReadWrite_K64

The program will open a file called test.txt in the root of the SD card, and will create one if it does not exist. It will then write "one two three four five" in the .txt file. It will then read the text and output the result. You will need a terminal application (I recommend PuTTy) in order to see the outputs. The current program overwrites anything that was previous on the SD card. To prevent this, change the "w" to "a" during the writing process. This changes the instruction from a 'write' to an 'append'.

Dependencies:   SDFileSystem mbed

Fork of SDFileSystem_HelloWorld by mbed official

main.cpp@0:bdbd3d6fc5d5, 2012-12-07 (annotated)

Committer:
mbed_official
Date:
Fri Dec 07 11:25:01 2012 +0000
Revision:
0:bdbd3d6fc5d5
Child:
1:2cf8f0893afd
First commit of SDFileSystem Hello World

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:bdbd3d6fc5d5 1 #include "mbed.h"
mbed_official 0:bdbd3d6fc5d5 2 #include "SDFileSystem.h"
mbed_official 0:bdbd3d6fc5d5 3
mbed_official 0:bdbd3d6fc5d5 4 SDFileSystem sd(p5, p6, p7, p8, "sd"); // the pinout on the mbed Cool Components workshop board
mbed_official 0:bdbd3d6fc5d5 5
mbed_official 0:bdbd3d6fc5d5 6 int main() {
mbed_official 0:bdbd3d6fc5d5 7 printf("Hello World!\n");
mbed_official 0:bdbd3d6fc5d5 8
mbed_official 0:bdbd3d6fc5d5 9 mkdir("/sd/mydir", 0777);
mbed_official 0:bdbd3d6fc5d5 10
mbed_official 0:bdbd3d6fc5d5 11 FILE *fp = fopen("/sd/mydir/sdtest.txt", "w");
mbed_official 0:bdbd3d6fc5d5 12 if(fp == NULL) {
mbed_official 0:bdbd3d6fc5d5 13 error("Could not open file for write\n");
mbed_official 0:bdbd3d6fc5d5 14 }
mbed_official 0:bdbd3d6fc5d5 15 fprintf(fp, "Hello fun SD Card World!");
mbed_official 0:bdbd3d6fc5d5 16 fclose(fp);
mbed_official 0:bdbd3d6fc5d5 17
mbed_official 0:bdbd3d6fc5d5 18 printf("Goodbye World!\n");
mbed_official 0:bdbd3d6fc5d5 19 }