Tick Tock / SDHCFileSystem

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SDHCFileSystem.h@2:243ee5f47c25, 2012-12-23 (annotated)

Committer:
TickTock
Date:
Sun Dec 23 22:57:35 2012 +0000
Revision:
2:243ee5f47c25
Parent:
1:1efbf75bd807 
.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
TickTock 0:89846a293813 1 /* mbed SDFileSystem Library, for providing file access to SD cards
TickTock 0:89846a293813 2 * Copyright (c) 2008-2010, sford
TickTock 0:89846a293813 3 *
TickTock 0:89846a293813 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
TickTock 0:89846a293813 5 * of this software and associated documentation files (the "Software"), to deal
TickTock 0:89846a293813 6 * in the Software without restriction, including without limitation the rights
TickTock 0:89846a293813 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
TickTock 0:89846a293813 8 * copies of the Software, and to permit persons to whom the Software is
TickTock 0:89846a293813 9 * furnished to do so, subject to the following conditions:
TickTock 0:89846a293813 10 *
TickTock 0:89846a293813 11 * The above copyright notice and this permission notice shall be included in
TickTock 0:89846a293813 12 * all copies or substantial portions of the Software.
TickTock 0:89846a293813 13 *
TickTock 0:89846a293813 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
TickTock 0:89846a293813 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
TickTock 0:89846a293813 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
TickTock 0:89846a293813 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
TickTock 0:89846a293813 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
TickTock 0:89846a293813 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
TickTock 0:89846a293813 20 * THE SOFTWARE.
TickTock 0:89846a293813 21 */
TickTock 0:89846a293813 22
TickTock 0:89846a293813 23 #ifndef MBED_SDHCFILESYSTEM_H
TickTock 0:89846a293813 24 #define MBED_SDHCFILESYSTEM_H
TickTock 0:89846a293813 25
TickTock 0:89846a293813 26 #include "mbed.h"
TickTock 0:89846a293813 27 #include "FATFileSystem.h"
TickTock 0:89846a293813 28
TickTock 1:1efbf75bd807 29
TickTock 0:89846a293813 30 /* Double Words */
TickTock 0:89846a293813 31 typedef unsigned long long uint64_t;
TickTock 0:89846a293813 32 typedef long long sint64_t;
TickTock 0:89846a293813 33
TickTock 0:89846a293813 34 /** Access the filesystem on an SD Card using SPI
TickTock 0:89846a293813 35 *
TickTock 0:89846a293813 36 * @code
TickTock 0:89846a293813 37 * #include "mbed.h"
TickTock 0:89846a293813 38 * #include "SDFileSystem.h"
TickTock 0:89846a293813 39 *
TickTock 0:89846a293813 40 * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
TickTock 0:89846a293813 41 *
TickTock 0:89846a293813 42 * int main() {
TickTock 0:89846a293813 43 * FILE *fp = fopen("/sd/myfile.txt", "w");
TickTock 0:89846a293813 44 * fprintf(fp, "Hello World!\n");
TickTock 0:89846a293813 45 * fclose(fp);
TickTock 0:89846a293813 46 * }
TickTock 0:89846a293813 47 */
TickTock 0:89846a293813 48 class SDFileSystem : public FATFileSystem {
TickTock 0:89846a293813 49 public:
TickTock 0:89846a293813 50
TickTock 0:89846a293813 51 /** Create the File System for accessing an SD Card using SPI
TickTock 0:89846a293813 52 *
TickTock 0:89846a293813 53 * @param mosi SPI mosi pin connected to SD Card
TickTock 0:89846a293813 54 * @param miso SPI miso pin conencted to SD Card
TickTock 0:89846a293813 55 * @param sclk SPI sclk pin connected to SD Card
TickTock 0:89846a293813 56 * @param cs DigitalOut pin used as SD Card chip select
TickTock 0:89846a293813 57 * @param name The name used to access the virtual filesystem
TickTock 0:89846a293813 58 */
TickTock 0:89846a293813 59 SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name);
TickTock 0:89846a293813 60 virtual int disk_initialize();
TickTock 0:89846a293813 61 virtual int disk_write(const char *buffer, int block_number);
TickTock 0:89846a293813 62 virtual int disk_read(char *buffer, int block_number);
TickTock 0:89846a293813 63 virtual int disk_status();
TickTock 0:89846a293813 64 virtual int disk_sync();
TickTock 0:89846a293813 65 virtual int disk_sectors();
TickTock 0:89846a293813 66
TickTock 0:89846a293813 67 protected:
TickTock 0:89846a293813 68
TickTock 0:89846a293813 69 int _cmd(int cmd, int arg);
TickTock 0:89846a293813 70 int _cmdx(int cmd, int arg);
TickTock 0:89846a293813 71 int _cmd8();
TickTock 0:89846a293813 72 int _cmd58();
TickTock 0:89846a293813 73 int initialise_card();
TickTock 0:89846a293813 74 int initialise_card_v1();
TickTock 0:89846a293813 75 int initialise_card_v2();
TickTock 0:89846a293813 76
TickTock 0:89846a293813 77 int _read(char *buffer, int length);
TickTock 0:89846a293813 78 int _write(const char *buffer, int length);
TickTock 0:89846a293813 79 int _sd_sectors();
TickTock 0:89846a293813 80 int _sectors;
TickTock 0:89846a293813 81
TickTock 0:89846a293813 82 SPI _spi;
TickTock 0:89846a293813 83 DigitalOut _cs;
TickTock 0:89846a293813 84 int cdv;
TickTock 0:89846a293813 85 };
TickTock 0:89846a293813 86
TickTock 0:89846a293813 87 #endif