Block access only to a SD Flash card conected via SPI. Based on SDFileSystem, but without any file system support.
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?
User | Revision | Line number | New 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 |