Block access only to a SD Flash card conected via SPI. Based on SDFileSystem, but without any file system support.
SDFlashDisk.h
- Committer:
- johnvanlaanen
- Date:
- 2013-06-21
- Revision:
- 0:99935a94f153
File content as of revision 0:99935a94f153:
/* * This file is derived from the standard MBED SDFileSystem.h file * The class defined here provides only low-level block access to the flash disk, with no filesystem. * * Modifications by John VanLaanen, June 2013 */ // Header from original file: /* mbed Microcontroller Library * Copyright (c) 2006-2012 ARM Limited * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef MBED_SDFLASHDISK_H #define MBED_SDFLASHDISK_H #include "mbed.h" #include <stdint.h> /** Access to an SD Flash Card using SPI * * @code * #include "mbed.h" * #include "SDFlashDisk.h" * * SDFlashDisk sd(p5, p6, p7, p12); // mosi, miso, sclk, cs * * } */ class SDFlashDisk { public: /** Create the object for accessing an SD Card using SPI * * @param mosi SPI mosi pin connected to SD Card * @param miso SPI miso pin conencted to SD Card * @param sclk SPI sclk pin connected to SD Card * @param cs DigitalOut pin used as SD Card chip select */ SDFlashDisk(PinName mosi, PinName miso, PinName sclk, PinName cs); virtual int disk_initialize(); virtual int disk_read(uint8_t * buffer, uint64_t block_number); virtual int disk_write(const uint8_t * buffer, uint64_t block_number); virtual uint64_t disk_sectors(); protected: int _cmd(int cmd, int arg); int _cmdx(int cmd, int arg); int _cmd8(); int _cmd58(); int initialise_card(); int initialise_card_v1(); int initialise_card_v2(); int _read(uint8_t * buffer, uint32_t length); int _write(const uint8_t *buffer, uint32_t length); uint64_t _sd_sectors(); uint64_t _sectors; SPI _spi; DigitalOut _cs; int cdv; }; #endif // MBED_SDFLASHDISK_H