USBMSD_SD.h

00001 /* mbed USBMSD_SD Library, for providing file access to SD cards
00002  * Copyright (c) 2008-2010, sford
00003  *
00004  * Permission is hereby granted, free of charge, to any person obtaining a copy
00005  * of this software and associated documentation files (the "Software"), to deal
00006  * in the Software without restriction, including without limitation the rights
00007  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00008  * copies of the Software, and to permit persons to whom the Software is
00009  * furnished to do so, subject to the following conditions:
00010  *
00011  * The above copyright notice and this permission notice shall be included in
00012  * all copies or substantial portions of the Software.
00013  *
00014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00017  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00019  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00020  * THE SOFTWARE.
00021  */
00022 
00023 #ifndef USBMSD_SD_H
00024 #define USBMSD_SD_H
00025 
00026 #include "mbed.h"
00027 #include "USBMSD.h"
00028 
00029 /* Double Words */
00030 typedef unsigned long long uint64_t;
00031 typedef long long sint64_t;
00032 /** Use the SDcard as mass storage device using the USBMSD class
00033  *
00034  * @code
00035  * #include "mbed.h"
00036  * #include "USBMSD_SD.h"
00037  *
00038  * USBMSD_SD sd(p5, p6, p7, p8);
00039  *
00040  * int main() {
00041  *   while(1);
00042  * }
00043  *
00044  * @endcode
00045  */
00046 class USBMSD_SD : public USBMSD {
00047 public:
00048 
00049     /** Create the File System for accessing an SD Card using SPI
00050      *
00051      * @param mosi SPI mosi pin connected to SD Card
00052      * @param miso SPI miso pin conencted to SD Card
00053      * @param sclk SPI sclk pin connected to SD Card
00054      * @param cs   DigitalOut pin used as SD Card chip select
00055      * @param name The name used to access the virtual filesystem
00056      */
00057     USBMSD_SD(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName ncardpresent, PinName activity, PinName test);
00058     virtual int disk_initialize();
00059     virtual int disk_write(const char *buffer, int block_number);
00060     virtual int disk_read(char *buffer, int block_number);    
00061     virtual int disk_status();
00062     virtual int disk_sync();
00063     virtual int disk_sectors();
00064     virtual uint64_t disk_size();
00065     virtual int disk_present();
00066 
00067 protected:
00068 
00069     int _cmd(int cmd, int arg);
00070     int _cmdx(int cmd, int arg);
00071     int _cmd8();
00072     int _cmd58();
00073     int initialise_card();
00074     int initialise_card_v1();
00075     int initialise_card_v2();
00076     
00077     int _read(char *buffer, int length);
00078     int _write(const char *buffer, int length);
00079     int _sd_sectors();
00080     int _sectors;
00081     
00082     uint64_t capacity;
00083     int _status;
00084     
00085     SPI _spi;
00086     DigitalOut _cs; 
00087     DigitalOut _activity; 
00088     DigitalIn _ncardpresent;
00089     int cdv;    
00090     DigitalOut _writeTest;
00091 };
00092 
00093 #endif