Norimasa Okamoto / USBLocalFileSystem

Emulation of LocalFileSystem with virtual COM.

Dependencies:   USBDevice

Dependents:   KL46Z-lpc81isp lpcterm2 

#include "USBLocalFileSystem.h"

int main() {
    USBLocalFileSystem* usb_local = new USBLocalFileSystem(); // RamDisk(64KB)

    while(1) {
        usb_local->lock(true);
        usb_local->remount();
        char filename[32];
        if (usb_local->find(filename, sizeof(filename), "*.TXT")) {
            FILE* fp = fopen(filename, "r");
            if (fp) {
                int c;
                while((c = fgetc(fp)) != EOF) {
                    usb_local->putc(c);
                }
                fclose(fp);
            }
        }    
        usb_local->lock(false);

        wait_ms(1000*5);
    }
}



Sample application：

Import programKL46Z-lpc81isp

ISP example program.

Last commit 04 May 2014 by Norimasa Okamoto

Import programlpcterm2

semihost server example program

Last commit 22 Jun 2014 by Norimasa Okamoto

fat/FATFileHandle.cpp

Committer:
va009039
Date:
2014-06-21
Revision:
6:528036abfb02
Parent:
0:39eb4d5b97df

File content as of revision 6:528036abfb02:

/* mbed Microcontroller Library
 * Copyright (c) 2006-2012 ARM Limited
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#include "ff.h"
#include "ffconf.h"
#include "mbed_debug.h"

#include "FATFileHandle.h"

FATFileHandle::FATFileHandle(FIL fh) {
    _fh = fh;
}

int FATFileHandle::close() {
    int retval = f_close(&_fh);
    delete this;
    return retval;
}

ssize_t FATFileHandle::write(const void* buffer, size_t length) {
    UINT n;
    FRESULT res = f_write(&_fh, buffer, length, &n);
    if (res) { 
        debug_if(FFS_DBG, "f_write() failed: %d", res);
        return -1;
    }
    return n;
}
        
ssize_t FATFileHandle::read(void* buffer, size_t length) {
    debug_if(FFS_DBG, "read(%d)\n", length);
    UINT n;
    FRESULT res = f_read(&_fh, buffer, length, &n);
    if (res) {
        debug_if(FFS_DBG, "f_read() failed: %d\n", res);
        return -1;
    }
    return n;
}

int FATFileHandle::isatty() {
    return 0;
}

off_t FATFileHandle::lseek(off_t position, int whence) {
    if (whence == SEEK_END) {
        position += _fh.fsize;
    } else if(whence==SEEK_CUR) {
        position += _fh.fptr;
    }
    FRESULT res = f_lseek(&_fh, position);
    if (res) {
        debug_if(FFS_DBG, "lseek failed: %d\n", res);
        return -1;
    } else {
        debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
        return _fh.fptr;
    }
}

int FATFileHandle::fsync() {
    FRESULT res = f_sync(&_fh);
    if (res) {
        debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
        return -1;
    }
    return 0;
}

off_t FATFileHandle::flen() {
    return _fh.fsize;
}