ze chen / SDFileSystem

hw

Dependencies:   FATFileSystem

Dependents:   wave_player_mp3

Fork of SDFileSystem by mbed official

SDFileSystem.h@4:0046f1b576ec, 2013-07-14 (annotated)

Committer:
zchen311
Date:
Sun Jul 14 20:29:53 2013 +0000
Revision:
4:0046f1b576ec
done

Who changed what in which revision?

UserRevisionLine numberNew contents of line
zchen311 4:0046f1b576ec 1 /* mbed Microcontroller Library
zchen311 4:0046f1b576ec 2 * Copyright (c) 2006-2012 ARM Limited
zchen311 4:0046f1b576ec 3 *
zchen311 4:0046f1b576ec 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
zchen311 4:0046f1b576ec 5 * of this software and associated documentation files (the "Software"), to deal
zchen311 4:0046f1b576ec 6 * in the Software without restriction, including without limitation the rights
zchen311 4:0046f1b576ec 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
zchen311 4:0046f1b576ec 8 * copies of the Software, and to permit persons to whom the Software is
zchen311 4:0046f1b576ec 9 * furnished to do so, subject to the following conditions:
zchen311 4:0046f1b576ec 10 *
zchen311 4:0046f1b576ec 11 * The above copyright notice and this permission notice shall be included in
zchen311 4:0046f1b576ec 12 * all copies or substantial portions of the Software.
zchen311 4:0046f1b576ec 13 *
zchen311 4:0046f1b576ec 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
zchen311 4:0046f1b576ec 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
zchen311 4:0046f1b576ec 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
zchen311 4:0046f1b576ec 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
zchen311 4:0046f1b576ec 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
zchen311 4:0046f1b576ec 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
zchen311 4:0046f1b576ec 20 * SOFTWARE.
zchen311 4:0046f1b576ec 21 */
zchen311 4:0046f1b576ec 22 #ifndef MBED_SDFILESYSTEM_H
zchen311 4:0046f1b576ec 23 #define MBED_SDFILESYSTEM_H
zchen311 4:0046f1b576ec 24
zchen311 4:0046f1b576ec 25 #include "mbed.h"
zchen311 4:0046f1b576ec 26 #include "FATFileSystem.h"
zchen311 4:0046f1b576ec 27 #include <stdint.h>
zchen311 4:0046f1b576ec 28
zchen311 4:0046f1b576ec 29 /** Access the filesystem on an SD Card using SPI
zchen311 4:0046f1b576ec 30 *
zchen311 4:0046f1b576ec 31 * @code
zchen311 4:0046f1b576ec 32 * #include "mbed.h"
zchen311 4:0046f1b576ec 33 * #include "SDFileSystem.h"
zchen311 4:0046f1b576ec 34 *
zchen311 4:0046f1b576ec 35 * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
zchen311 4:0046f1b576ec 36 *
zchen311 4:0046f1b576ec 37 * int main() {
zchen311 4:0046f1b576ec 38 * FILE *fp = fopen("/sd/myfile.txt", "w");
zchen311 4:0046f1b576ec 39 * fprintf(fp, "Hello World!\n");
zchen311 4:0046f1b576ec 40 * fclose(fp);
zchen311 4:0046f1b576ec 41 * }
zchen311 4:0046f1b576ec 42 */
zchen311 4:0046f1b576ec 43 class SDFileSystem : public FATFileSystem {
zchen311 4:0046f1b576ec 44 public:
zchen311 4:0046f1b576ec 45
zchen311 4:0046f1b576ec 46 /** Create the File System for accessing an SD Card using SPI
zchen311 4:0046f1b576ec 47 *
zchen311 4:0046f1b576ec 48 * @param mosi SPI mosi pin connected to SD Card
zchen311 4:0046f1b576ec 49 * @param miso SPI miso pin conencted to SD Card
zchen311 4:0046f1b576ec 50 * @param sclk SPI sclk pin connected to SD Card
zchen311 4:0046f1b576ec 51 * @param cs DigitalOut pin used as SD Card chip select
zchen311 4:0046f1b576ec 52 * @param name The name used to access the virtual filesystem
zchen311 4:0046f1b576ec 53 */
zchen311 4:0046f1b576ec 54 SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName cd, const char* name);
zchen311 4:0046f1b576ec 55 virtual int disk_initialize();
zchen311 4:0046f1b576ec 56 virtual int disk_status();
zchen311 4:0046f1b576ec 57 virtual int disk_read(uint8_t * buffer, uint64_t block_number);
zchen311 4:0046f1b576ec 58 virtual int disk_write(const uint8_t * buffer, uint64_t block_number);
zchen311 4:0046f1b576ec 59 virtual int disk_sync();
zchen311 4:0046f1b576ec 60 virtual uint64_t disk_sectors();
zchen311 4:0046f1b576ec 61 bool sd_inserted();
zchen311 4:0046f1b576ec 62
zchen311 4:0046f1b576ec 63 protected:
zchen311 4:0046f1b576ec 64
zchen311 4:0046f1b576ec 65 int _cmd(int cmd, int arg);
zchen311 4:0046f1b576ec 66 int _cmdx(int cmd, int arg);
zchen311 4:0046f1b576ec 67 int _cmd8();
zchen311 4:0046f1b576ec 68 int _cmd58();
zchen311 4:0046f1b576ec 69 int initialise_card();
zchen311 4:0046f1b576ec 70 int initialise_card_v1();
zchen311 4:0046f1b576ec 71 int initialise_card_v2();
zchen311 4:0046f1b576ec 72
zchen311 4:0046f1b576ec 73 int _read(uint8_t * buffer, uint32_t length);
zchen311 4:0046f1b576ec 74 int _write(const uint8_t *buffer, uint32_t length);
zchen311 4:0046f1b576ec 75 uint64_t _sd_sectors();
zchen311 4:0046f1b576ec 76 uint64_t _sectors;
zchen311 4:0046f1b576ec 77
zchen311 4:0046f1b576ec 78 SPI _spi;
zchen311 4:0046f1b576ec 79 DigitalOut _cs;
zchen311 4:0046f1b576ec 80 DigitalIn _cd;
zchen311 4:0046f1b576ec 81 int cdv;
zchen311 4:0046f1b576ec 82 };
zchen311 4:0046f1b576ec 83
zchen311 4:0046f1b576ec 84 #endif