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git.gir.st - tmk_keyboard.git/blob - tmk_core/tool/mbed/mbed-sdk/libraries/fs/sd/SDFileSystem.h
1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2012 ARM Limited
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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
22 #ifndef MBED_SDFILESYSTEM_H
23 #define MBED_SDFILESYSTEM_H
26 #include "FATFileSystem.h"
29 /** Access the filesystem on an SD Card using SPI
33 * #include "SDFileSystem.h"
35 * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
38 * FILE *fp = fopen("/sd/myfile.txt", "w");
39 * fprintf(fp, "Hello World!\n");
43 class SDFileSystem
: public FATFileSystem
{
46 /** Create the File System for accessing an SD Card using SPI
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
54 SDFileSystem(PinName mosi
, PinName miso
, PinName sclk
, PinName cs
, const char* name
);
55 virtual int disk_initialize();
56 virtual int disk_status();
57 virtual int disk_read(uint8_t* buffer
, uint64_t block_number
, uint8_t count
);
58 virtual int disk_write(const uint8_t* buffer
, uint64_t block_number
, uint8_t count
);
59 virtual int disk_sync();
60 virtual uint64_t disk_sectors();
64 int _cmd(int cmd
, int arg
);
65 int _cmdx(int cmd
, int arg
);
68 int initialise_card();
69 int initialise_card_v1();
70 int initialise_card_v2();
72 int _read(uint8_t * buffer
, uint32_t length
);
73 int _write(const uint8_t *buffer
, uint32_t length
);
74 uint64_t _sd_sectors();
77 void set_init_sck(uint32_t sck
) { _init_sck
= sck
; }
78 // Note: The highest SPI clock rate is 20 MHz for MMC and 25 MHz for SD
79 void set_transfer_sck(uint32_t sck
) { _transfer_sck
= sck
; }
81 uint32_t _transfer_sck
;