ECE 2035 TA / SDFileSystem

SDFileSystem Library

Dependents:   ECE2035_SUM17_Project

SDFileSystem.h@0:71be9322f4eb, 2017-07-14 (annotated)

Committer:
kennyainny
Date:
Fri Jul 14 21:42:13 2017 +0000
Revision:
0:71be9322f4eb
no changes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kennyainny 0:71be9322f4eb 1 /* mbed Microcontroller Library
kennyainny 0:71be9322f4eb 2 * Copyright (c) 2006-2012 ARM Limited
kennyainny 0:71be9322f4eb 3 *
kennyainny 0:71be9322f4eb 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
kennyainny 0:71be9322f4eb 5 * of this software and associated documentation files (the "Software"), to deal
kennyainny 0:71be9322f4eb 6 * in the Software without restriction, including without limitation the rights
kennyainny 0:71be9322f4eb 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
kennyainny 0:71be9322f4eb 8 * copies of the Software, and to permit persons to whom the Software is
kennyainny 0:71be9322f4eb 9 * furnished to do so, subject to the following conditions:
kennyainny 0:71be9322f4eb 10 *
kennyainny 0:71be9322f4eb 11 * The above copyright notice and this permission notice shall be included in
kennyainny 0:71be9322f4eb 12 * all copies or substantial portions of the Software.
kennyainny 0:71be9322f4eb 13 *
kennyainny 0:71be9322f4eb 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
kennyainny 0:71be9322f4eb 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
kennyainny 0:71be9322f4eb 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
kennyainny 0:71be9322f4eb 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
kennyainny 0:71be9322f4eb 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kennyainny 0:71be9322f4eb 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
kennyainny 0:71be9322f4eb 20 * SOFTWARE.
kennyainny 0:71be9322f4eb 21 */
kennyainny 0:71be9322f4eb 22 #ifndef MBED_SDFILESYSTEM_H
kennyainny 0:71be9322f4eb 23 #define MBED_SDFILESYSTEM_H
kennyainny 0:71be9322f4eb 24
kennyainny 0:71be9322f4eb 25 #include "mbed.h"
kennyainny 0:71be9322f4eb 26 #include "FATFileSystem.h"
kennyainny 0:71be9322f4eb 27 #include <stdint.h>
kennyainny 0:71be9322f4eb 28
kennyainny 0:71be9322f4eb 29 /** Access the filesystem on an SD Card using SPI
kennyainny 0:71be9322f4eb 30 *
kennyainny 0:71be9322f4eb 31 * @code
kennyainny 0:71be9322f4eb 32 * #include "mbed.h"
kennyainny 0:71be9322f4eb 33 * #include "SDFileSystem.h"
kennyainny 0:71be9322f4eb 34 *
kennyainny 0:71be9322f4eb 35 * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
kennyainny 0:71be9322f4eb 36 *
kennyainny 0:71be9322f4eb 37 * int main() {
kennyainny 0:71be9322f4eb 38 * FILE *fp = fopen("/sd/myfile.txt", "w");
kennyainny 0:71be9322f4eb 39 * fprintf(fp, "Hello World!\n");
kennyainny 0:71be9322f4eb 40 * fclose(fp);
kennyainny 0:71be9322f4eb 41 * }
kennyainny 0:71be9322f4eb 42 */
kennyainny 0:71be9322f4eb 43 class SDFileSystem : public FATFileSystem {
kennyainny 0:71be9322f4eb 44 public:
kennyainny 0:71be9322f4eb 45
kennyainny 0:71be9322f4eb 46 /** Create the File System for accessing an SD Card using SPI
kennyainny 0:71be9322f4eb 47 *
kennyainny 0:71be9322f4eb 48 * @param mosi SPI mosi pin connected to SD Card
kennyainny 0:71be9322f4eb 49 * @param miso SPI miso pin conencted to SD Card
kennyainny 0:71be9322f4eb 50 * @param sclk SPI sclk pin connected to SD Card
kennyainny 0:71be9322f4eb 51 * @param cs DigitalOut pin used as SD Card chip select
kennyainny 0:71be9322f4eb 52 * @param name The name used to access the virtual filesystem
kennyainny 0:71be9322f4eb 53 */
kennyainny 0:71be9322f4eb 54 SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name);
kennyainny 0:71be9322f4eb 55 virtual int disk_initialize();
kennyainny 0:71be9322f4eb 56 virtual int disk_status();
kennyainny 0:71be9322f4eb 57 virtual int disk_read(uint8_t * buffer, uint64_t block_number);
kennyainny 0:71be9322f4eb 58 virtual int disk_write(const uint8_t * buffer, uint64_t block_number);
kennyainny 0:71be9322f4eb 59 virtual int disk_sync();
kennyainny 0:71be9322f4eb 60 virtual uint64_t disk_sectors();
kennyainny 0:71be9322f4eb 61
kennyainny 0:71be9322f4eb 62 protected:
kennyainny 0:71be9322f4eb 63
kennyainny 0:71be9322f4eb 64 int _cmd(int cmd, int arg);
kennyainny 0:71be9322f4eb 65 int _cmdx(int cmd, int arg);
kennyainny 0:71be9322f4eb 66 int _cmd8();
kennyainny 0:71be9322f4eb 67 int _cmd58();
kennyainny 0:71be9322f4eb 68 int initialise_card();
kennyainny 0:71be9322f4eb 69 int initialise_card_v1();
kennyainny 0:71be9322f4eb 70 int initialise_card_v2();
kennyainny 0:71be9322f4eb 71
kennyainny 0:71be9322f4eb 72 int _read(uint8_t * buffer, uint32_t length);
kennyainny 0:71be9322f4eb 73 int _write(const uint8_t *buffer, uint32_t length);
kennyainny 0:71be9322f4eb 74 uint64_t _sd_sectors();
kennyainny 0:71be9322f4eb 75 uint64_t _sectors;
kennyainny 0:71be9322f4eb 76
kennyainny 0:71be9322f4eb 77 SPI _spi;
kennyainny 0:71be9322f4eb 78 DigitalOut _cs;
kennyainny 0:71be9322f4eb 79 int cdv;
kennyainny 0:71be9322f4eb 80 };
kennyainny 0:71be9322f4eb 81
kennyainny 0:71be9322f4eb 82 #endif