class LocalFileSystem : public FileSystemLike

A filesystem for accessing the local mbed Microcontroller USB disk drive

This allows programs to read and write files on the same disk drive that is used to program the mbed Microcontroller.  Once created, the standard C file access functions are used to open, read and write files.

Example

#include "mbed.h"

LocalFileSystem local("local");             // Create the local filesystem under the name "local"

int main() {
    FILE *fp = fopen("/local/out.txt", "w");  // Open "out.txt" on the local file system for writing
    fprintf(fp, "Hello World!");
    fclose(fp);
    remove("/local/out.txt");                 // Removes the file "out.txt" from the local file system

    DIR *d = opendir("/local");               // Opens the root directory of the local file system
    struct dirent *p;
    while((p = readdir(d)) != NULL) {         // Print the names of the files in the local file system
      printf("%s\n", p->d_name);              // to stdout.
    }
    closedir(d);
}

Implementation Notes

If the microcontroller program makes an access to the local drive, it will be marked as “removed” on the Host computer.  This means it is no longer accessible from the Host Computer.

The drive will only re-appear when the microcontroller program exists.  Note that if the program does not exit, you will need to hold down reset on the mbed Microcontroller to be able to see the drive again!