Flash_USBFileSystem.cpp

00001 /* mbed USBMSD_Ram Library
00002  *
00003  * Permission is hereby granted, free of charge, to any person obtaining a copy
00004  * of this software and associated documentation files (the "Software"), to deal
00005  * in the Software without restriction, including without limitation the rights
00006  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00007  * copies of the Software, and to permit persons to whom the Software is
00008  * furnished to do so, subject to the following conditions:
00009  *
00010  * The above copyright notice and this permission notice shall be included in
00011  * all copies or substantial portions of the Software.
00012  *
00013  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00014  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00015  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00016  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00017  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00018  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00019  * THE SOFTWARE.
00020  */
00021  
00022 #include "Flash_USBFileSystem.h"
00023  
00024 FlashUSB::FlashUSB(PinName mosi, PinName miso, PinName sclk, PinName cs) : USBFileSystem("USB"), flash(mosi, miso, sclk, cs)  {
00025     //no init
00026     _status = 0x01;
00027 }
00028  
00029 int FlashUSB::disk_initialize() {
00030     // OK
00031     _status = 0x00;
00032     return 0;
00033 }
00034  
00035 int FlashUSB::_disk_write(const uint8_t * buffer, uint64_t block_number) { 
00036     flash.eraseSector(block_number*4096);
00037     flash.write(block_number*4096, (char*) buffer, 256);
00038     flash.write(block_number*4096+256, (char*) buffer+256, 256);
00039     return 0;    
00040 }
00041  
00042 int FlashUSB::disk_read(uint8_t * buffer, uint64_t block_number) {
00043     flash.read(block_number*4096, (char*) buffer, 512);
00044     return 0;
00045 }
00046  
00047 int FlashUSB::_disk_status() { return _status; }
00048 int FlashUSB::disk_sync() { return 0; }
00049 uint64_t FlashUSB::disk_sectors() { return 512; }
00050 
00051