John VanLaanen / SDFlashDisk

Block access only to a SD Flash card conected via SPI. Based on SDFileSystem, but without any file system support.

Dependents:   SDcard

SDFlashDisk.h@0:99935a94f153, 2013-06-21 (annotated)

Committer:
johnvanlaanen
Date:
Fri Jun 21 16:50:37 2013 +0000
Revision:
0:99935a94f153
Create SDFlashDisk library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
johnvanlaanen 0:99935a94f153 1 /*
johnvanlaanen 0:99935a94f153 2 * This file is derived from the standard MBED SDFileSystem.h file
johnvanlaanen 0:99935a94f153 3 * The class defined here provides only low-level block access to the flash disk, with no filesystem.
johnvanlaanen 0:99935a94f153 4 *
johnvanlaanen 0:99935a94f153 5 * Modifications by John VanLaanen, June 2013
johnvanlaanen 0:99935a94f153 6 */
johnvanlaanen 0:99935a94f153 7
johnvanlaanen 0:99935a94f153 8 // Header from original file:
johnvanlaanen 0:99935a94f153 9
johnvanlaanen 0:99935a94f153 10 /* mbed Microcontroller Library
johnvanlaanen 0:99935a94f153 11 * Copyright (c) 2006-2012 ARM Limited
johnvanlaanen 0:99935a94f153 12 *
johnvanlaanen 0:99935a94f153 13 * Permission is hereby granted, free of charge, to any person obtaining a copy
johnvanlaanen 0:99935a94f153 14 * of this software and associated documentation files (the "Software"), to deal
johnvanlaanen 0:99935a94f153 15 * in the Software without restriction, including without limitation the rights
johnvanlaanen 0:99935a94f153 16 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
johnvanlaanen 0:99935a94f153 17 * copies of the Software, and to permit persons to whom the Software is
johnvanlaanen 0:99935a94f153 18 * furnished to do so, subject to the following conditions:
johnvanlaanen 0:99935a94f153 19 *
johnvanlaanen 0:99935a94f153 20 * The above copyright notice and this permission notice shall be included in
johnvanlaanen 0:99935a94f153 21 * all copies or substantial portions of the Software.
johnvanlaanen 0:99935a94f153 22 *
johnvanlaanen 0:99935a94f153 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
johnvanlaanen 0:99935a94f153 24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
johnvanlaanen 0:99935a94f153 25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
johnvanlaanen 0:99935a94f153 26 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
johnvanlaanen 0:99935a94f153 27 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
johnvanlaanen 0:99935a94f153 28 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
johnvanlaanen 0:99935a94f153 29 * SOFTWARE.
johnvanlaanen 0:99935a94f153 30 */
johnvanlaanen 0:99935a94f153 31
johnvanlaanen 0:99935a94f153 32 #ifndef MBED_SDFLASHDISK_H
johnvanlaanen 0:99935a94f153 33 #define MBED_SDFLASHDISK_H
johnvanlaanen 0:99935a94f153 34
johnvanlaanen 0:99935a94f153 35 #include "mbed.h"
johnvanlaanen 0:99935a94f153 36 #include <stdint.h>
johnvanlaanen 0:99935a94f153 37
johnvanlaanen 0:99935a94f153 38 /** Access to an SD Flash Card using SPI
johnvanlaanen 0:99935a94f153 39 *
johnvanlaanen 0:99935a94f153 40 * @code
johnvanlaanen 0:99935a94f153 41 * #include "mbed.h"
johnvanlaanen 0:99935a94f153 42 * #include "SDFlashDisk.h"
johnvanlaanen 0:99935a94f153 43 *
johnvanlaanen 0:99935a94f153 44 * SDFlashDisk sd(p5, p6, p7, p12); // mosi, miso, sclk, cs
johnvanlaanen 0:99935a94f153 45 *
johnvanlaanen 0:99935a94f153 46 * }
johnvanlaanen 0:99935a94f153 47 */
johnvanlaanen 0:99935a94f153 48 class SDFlashDisk {
johnvanlaanen 0:99935a94f153 49 public:
johnvanlaanen 0:99935a94f153 50
johnvanlaanen 0:99935a94f153 51 /** Create the object for accessing an SD Card using SPI
johnvanlaanen 0:99935a94f153 52 *
johnvanlaanen 0:99935a94f153 53 * @param mosi SPI mosi pin connected to SD Card
johnvanlaanen 0:99935a94f153 54 * @param miso SPI miso pin conencted to SD Card
johnvanlaanen 0:99935a94f153 55 * @param sclk SPI sclk pin connected to SD Card
johnvanlaanen 0:99935a94f153 56 * @param cs DigitalOut pin used as SD Card chip select
johnvanlaanen 0:99935a94f153 57 */
johnvanlaanen 0:99935a94f153 58 SDFlashDisk(PinName mosi, PinName miso, PinName sclk, PinName cs);
johnvanlaanen 0:99935a94f153 59 virtual int disk_initialize();
johnvanlaanen 0:99935a94f153 60 virtual int disk_read(uint8_t * buffer, uint64_t block_number);
johnvanlaanen 0:99935a94f153 61 virtual int disk_write(const uint8_t * buffer, uint64_t block_number);
johnvanlaanen 0:99935a94f153 62 virtual uint64_t disk_sectors();
johnvanlaanen 0:99935a94f153 63
johnvanlaanen 0:99935a94f153 64 protected:
johnvanlaanen 0:99935a94f153 65
johnvanlaanen 0:99935a94f153 66 int _cmd(int cmd, int arg);
johnvanlaanen 0:99935a94f153 67 int _cmdx(int cmd, int arg);
johnvanlaanen 0:99935a94f153 68 int _cmd8();
johnvanlaanen 0:99935a94f153 69 int _cmd58();
johnvanlaanen 0:99935a94f153 70 int initialise_card();
johnvanlaanen 0:99935a94f153 71 int initialise_card_v1();
johnvanlaanen 0:99935a94f153 72 int initialise_card_v2();
johnvanlaanen 0:99935a94f153 73
johnvanlaanen 0:99935a94f153 74 int _read(uint8_t * buffer, uint32_t length);
johnvanlaanen 0:99935a94f153 75 int _write(const uint8_t *buffer, uint32_t length);
johnvanlaanen 0:99935a94f153 76 uint64_t _sd_sectors();
johnvanlaanen 0:99935a94f153 77 uint64_t _sectors;
johnvanlaanen 0:99935a94f153 78
johnvanlaanen 0:99935a94f153 79 SPI _spi;
johnvanlaanen 0:99935a94f153 80 DigitalOut _cs;
johnvanlaanen 0:99935a94f153 81 int cdv;
johnvanlaanen 0:99935a94f153 82 };
johnvanlaanen 0:99935a94f153 83
johnvanlaanen 0:99935a94f153 84 #endif // MBED_SDFLASHDISK_H
johnvanlaanen 0:99935a94f153 85