1 /* mbed Microcontroller Library
2  * Copyright (c) 2006-2012 ARM Limited
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a copy
5  * of this software and associated documentation files (the "Software"), to deal
6  * in the Software without restriction, including without limitation the rights
7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8  * copies of the Software, and to permit persons to whom the Software is
9  * furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20  * SOFTWARE.
21  */
22 #ifndef MBED_SDFILESYSTEM_H
23 #define MBED_SDFILESYSTEM_H
24 
25 #include "mbed.h"
26 #include "FATFileSystem.h"
27 #include <stdint.h>
28 
29 /** Access the filesystem on an SD Card using SPI
30  *
31  * @code
32  * #include "mbed.h"
33  * #include "SDFileSystem.h"
34  *
35  * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
36  *
37  * int main() {
38  *     FILE *fp = fopen("/sd/myfile.txt", "w");
39  *     fprintf(fp, "Hello World!\n");
40  *     fclose(fp);
41  * }
42  */
43 class SDFileSystem : public FATFileSystem {
44 public:
45 
46     /** Create the File System for accessing an SD Card using SPI
47      *
48      * @param mosi SPI mosi pin connected to SD Card
49      * @param miso SPI miso pin conencted to SD Card
50      * @param sclk SPI sclk pin connected to SD Card
51      * @param cs   DigitalOut pin used as SD Card chip select
52      * @param name The name used to access the virtual filesystem
53      */
54     SDFileSystem(const char* name);
55 	virtual ~SDFileSystem();
56     virtual int disk_initialize();
57     virtual int disk_status();
58     virtual int disk_read(uint8_t* buffer, uint64_t block_number, uint8_t count);
59     virtual int disk_write(const uint8_t* buffer, uint64_t block_number, uint8_t count);
60     virtual int disk_sync();
61     virtual uint64_t disk_sectors();
62 
63 protected:
64 
65     uint64_t _sd_sectors();
66     uint64_t _sectors;
67 
68     int _is_initialized;
69 };
70 
71 #endif
72