Matthew Sims / mbed

Lab 1 Program C

Dependents:   Lab1C

Fork of mbed by -deleted-

LocalFileSystem.h@8:00a04e5cd407, 2009-02-03 (annotated)

Committer:
simon.ford@mbed.co.uk
Date:
Tue Feb 03 18:02:02 2009 +0000
Revision:
8:00a04e5cd407
Parent:
4:5d1359a283bc
Child:
9:cf0d45ce28a6
* Update to improve filesystem support

 * Add a generic FATFileSystem

Who changed what in which revision?

UserRevisionLine numberNew contents of line
simon.ford@mbed.co.uk 4:5d1359a283bc 1 /* mbed Microcontroller Library - SemihostFileSystem
simon.ford@mbed.co.uk 4:5d1359a283bc 2 * Copyright (c) 2007-2008, sford
simon.ford@mbed.co.uk 4:5d1359a283bc 3 */
simon.ford@mbed.co.uk 4:5d1359a283bc 4
simon.ford@mbed.co.uk 4:5d1359a283bc 5 #ifndef MBED_LOCALFILESYSTEM_H
simon.ford@mbed.co.uk 4:5d1359a283bc 6 #define MBED_LOCALFILESYSTEM_H
simon.ford@mbed.co.uk 4:5d1359a283bc 7
simon.ford@mbed.co.uk 4:5d1359a283bc 8 #include "FileSystemLike.h"
simon.ford@mbed.co.uk 4:5d1359a283bc 9
simon.ford@mbed.co.uk 4:5d1359a283bc 10 namespace mbed {
simon.ford@mbed.co.uk 4:5d1359a283bc 11
simon.ford@mbed.co.uk 4:5d1359a283bc 12 /* Class: LocalFileSystem
simon.ford@mbed.co.uk 4:5d1359a283bc 13 * A filesystem for accessing the local mbed Microcontroller USB disk drive.
simon.ford@mbed.co.uk 4:5d1359a283bc 14 *
simon.ford@mbed.co.uk 4:5d1359a283bc 15 * This allows programs to read and write files on the same disk drive that is used to program the
simon.ford@mbed.co.uk 4:5d1359a283bc 16 * mbed Microcontroller. Once created, the standard C file access functions are used to open,
simon.ford@mbed.co.uk 4:5d1359a283bc 17 * read and write files.
simon.ford@mbed.co.uk 4:5d1359a283bc 18 *
simon.ford@mbed.co.uk 4:5d1359a283bc 19 * Example:
simon.ford@mbed.co.uk 4:5d1359a283bc 20 * > #include "mbed.h"
simon.ford@mbed.co.uk 4:5d1359a283bc 21 * >
simon.ford@mbed.co.uk 4:5d1359a283bc 22 * > LocalFileSystem local("local"); // Create the local filesystem under the name "local"
simon.ford@mbed.co.uk 4:5d1359a283bc 23 * >
simon.ford@mbed.co.uk 4:5d1359a283bc 24 * > int main() {
simon.ford@mbed.co.uk 4:5d1359a283bc 25 * > FILE *fp = fopen("/local/out.txt", "w"); // Open "out.txt" on the local file system for writing
simon.ford@mbed.co.uk 4:5d1359a283bc 26 * > fprintf(fp, "Hello World!");
simon.ford@mbed.co.uk 4:5d1359a283bc 27 * > fclose(fp);
simon.ford@mbed.co.uk 8:00a04e5cd407 28 * > remove("/local/out.txt"); // Removes the file "out.txt" from the local file system
simon.ford@mbed.co.uk 8:00a04e5cd407 29 * >
simon.ford@mbed.co.uk 8:00a04e5cd407 30 * > DIR *d = opendir("/local"); // Opens the root directory of the local file system
simon.ford@mbed.co.uk 8:00a04e5cd407 31 * > struct dirent *p;
simon.ford@mbed.co.uk 8:00a04e5cd407 32 * > while((p = readdir(d)) != NULL) { // Print the names of the files in the local file system
simon.ford@mbed.co.uk 8:00a04e5cd407 33 * > printf("%s\n", p->d_name); // to stdout.
simon.ford@mbed.co.uk 8:00a04e5cd407 34 * > }
simon.ford@mbed.co.uk 8:00a04e5cd407 35 * > closedir(d);
simon.ford@mbed.co.uk 4:5d1359a283bc 36 * > }
simon.ford@mbed.co.uk 4:5d1359a283bc 37 *
simon.ford@mbed.co.uk 4:5d1359a283bc 38 * Implementation Notes:
simon.ford@mbed.co.uk 4:5d1359a283bc 39 * If the microcontroller program makes an access to the local drive, it will be marked as "removed"
simon.ford@mbed.co.uk 4:5d1359a283bc 40 * on the Host computer. This means it is no longer accessible from the Host Computer.
simon.ford@mbed.co.uk 4:5d1359a283bc 41 *
simon.ford@mbed.co.uk 4:5d1359a283bc 42 * The drive will only re-appear when the microcontroller program exists. Note that if the program does
simon.ford@mbed.co.uk 4:5d1359a283bc 43 * not exit, you will need to hold down reset on the mbed Microcontroller to be able to see the drive again!
simon.ford@mbed.co.uk 4:5d1359a283bc 44 */
simon.ford@mbed.co.uk 4:5d1359a283bc 45 class LocalFileSystem : public FileSystemLike {
simon.ford@mbed.co.uk 4:5d1359a283bc 46
simon.ford@mbed.co.uk 4:5d1359a283bc 47 public:
simon.ford@mbed.co.uk 4:5d1359a283bc 48
simon.ford@mbed.co.uk 4:5d1359a283bc 49 LocalFileSystem(const char* n) : FileSystemLike(n) {
simon.ford@mbed.co.uk 4:5d1359a283bc 50
simon.ford@mbed.co.uk 4:5d1359a283bc 51 }
simon.ford@mbed.co.uk 4:5d1359a283bc 52
simon.ford@mbed.co.uk 4:5d1359a283bc 53 virtual FileHandle *open(const char* name, int flags);
simon.ford@mbed.co.uk 4:5d1359a283bc 54 virtual int remove(const char *filename);
simon.ford@mbed.co.uk 8:00a04e5cd407 55 virtual DirHandle *opendir(const char *name);
simon.ford@mbed.co.uk 4:5d1359a283bc 56 };
simon.ford@mbed.co.uk 4:5d1359a283bc 57
simon.ford@mbed.co.uk 4:5d1359a283bc 58 } // namespace mbed
simon.ford@mbed.co.uk 4:5d1359a283bc 59
simon.ford@mbed.co.uk 4:5d1359a283bc 60 #endif