Tyler Weaver / SDHC_FileSystem

SDHCFileSystem in a library. Requires FatFileSystem

Dependents:   sdhc_speed_test ZY_FGD1442701V1_BusOut_SDHC frdm_gpio SDcard

SDHCFileSystem.h@0:b553aa902f90, 2012-10-15 (annotated)

Committer:
tylerjw
Date:
Mon Oct 15 18:35:58 2012 +0000
Revision:
0:b553aa902f90
SDHC FileSystem placed in a library.; ; Requires FatFileSystem

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tylerjw 0:b553aa902f90 1 /* mbed SDFileSystem Library, for providing file access to SD cards
tylerjw 0:b553aa902f90 2 * Copyright (c) 2008-2010, sford
tylerjw 0:b553aa902f90 3 *
tylerjw 0:b553aa902f90 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
tylerjw 0:b553aa902f90 5 * of this software and associated documentation files (the "Software"), to deal
tylerjw 0:b553aa902f90 6 * in the Software without restriction, including without limitation the rights
tylerjw 0:b553aa902f90 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
tylerjw 0:b553aa902f90 8 * copies of the Software, and to permit persons to whom the Software is
tylerjw 0:b553aa902f90 9 * furnished to do so, subject to the following conditions:
tylerjw 0:b553aa902f90 10 *
tylerjw 0:b553aa902f90 11 * The above copyright notice and this permission notice shall be included in
tylerjw 0:b553aa902f90 12 * all copies or substantial portions of the Software.
tylerjw 0:b553aa902f90 13 *
tylerjw 0:b553aa902f90 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
tylerjw 0:b553aa902f90 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
tylerjw 0:b553aa902f90 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
tylerjw 0:b553aa902f90 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
tylerjw 0:b553aa902f90 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
tylerjw 0:b553aa902f90 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
tylerjw 0:b553aa902f90 20 * THE SOFTWARE.
tylerjw 0:b553aa902f90 21 */
tylerjw 0:b553aa902f90 22
tylerjw 0:b553aa902f90 23 #ifndef MBED_SDHCFILESYSTEM_H
tylerjw 0:b553aa902f90 24 #define MBED_SDHCFILESYSTEM_H
tylerjw 0:b553aa902f90 25
tylerjw 0:b553aa902f90 26 #include "mbed.h"
tylerjw 0:b553aa902f90 27 #include "FATFileSystem.h"
tylerjw 0:b553aa902f90 28
tylerjw 0:b553aa902f90 29 /* Double Words */
tylerjw 0:b553aa902f90 30 typedef unsigned long long uint64_t;
tylerjw 0:b553aa902f90 31 typedef long long sint64_t;
tylerjw 0:b553aa902f90 32
tylerjw 0:b553aa902f90 33 /** Access the filesystem on an SD Card using SPI
tylerjw 0:b553aa902f90 34 *
tylerjw 0:b553aa902f90 35 * @code
tylerjw 0:b553aa902f90 36 * #include "mbed.h"
tylerjw 0:b553aa902f90 37 * #include "SDFileSystem.h"
tylerjw 0:b553aa902f90 38 *
tylerjw 0:b553aa902f90 39 * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
tylerjw 0:b553aa902f90 40 *
tylerjw 0:b553aa902f90 41 * int main() {
tylerjw 0:b553aa902f90 42 * FILE *fp = fopen("/sd/myfile.txt", "w");
tylerjw 0:b553aa902f90 43 * fprintf(fp, "Hello World!\n");
tylerjw 0:b553aa902f90 44 * fclose(fp);
tylerjw 0:b553aa902f90 45 * }
tylerjw 0:b553aa902f90 46 */
tylerjw 0:b553aa902f90 47 class SDFileSystem : public FATFileSystem {
tylerjw 0:b553aa902f90 48 public:
tylerjw 0:b553aa902f90 49
tylerjw 0:b553aa902f90 50 /** Create the File System for accessing an SD Card using SPI
tylerjw 0:b553aa902f90 51 *
tylerjw 0:b553aa902f90 52 * @param mosi SPI mosi pin connected to SD Card
tylerjw 0:b553aa902f90 53 * @param miso SPI miso pin conencted to SD Card
tylerjw 0:b553aa902f90 54 * @param sclk SPI sclk pin connected to SD Card
tylerjw 0:b553aa902f90 55 * @param cs DigitalOut pin used as SD Card chip select
tylerjw 0:b553aa902f90 56 * @param name The name used to access the virtual filesystem
tylerjw 0:b553aa902f90 57 */
tylerjw 0:b553aa902f90 58 SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name);
tylerjw 0:b553aa902f90 59 virtual int disk_initialize();
tylerjw 0:b553aa902f90 60 virtual int disk_write(const char *buffer, int block_number);
tylerjw 0:b553aa902f90 61 virtual int disk_read(char *buffer, int block_number);
tylerjw 0:b553aa902f90 62 virtual int disk_status();
tylerjw 0:b553aa902f90 63 virtual int disk_sync();
tylerjw 0:b553aa902f90 64 virtual int disk_sectors();
tylerjw 0:b553aa902f90 65
tylerjw 0:b553aa902f90 66 protected:
tylerjw 0:b553aa902f90 67
tylerjw 0:b553aa902f90 68 int _cmd(int cmd, int arg);
tylerjw 0:b553aa902f90 69 int _cmdx(int cmd, int arg);
tylerjw 0:b553aa902f90 70 int _cmd8();
tylerjw 0:b553aa902f90 71 int _cmd58();
tylerjw 0:b553aa902f90 72 int initialise_card();
tylerjw 0:b553aa902f90 73 int initialise_card_v1();
tylerjw 0:b553aa902f90 74 int initialise_card_v2();
tylerjw 0:b553aa902f90 75
tylerjw 0:b553aa902f90 76 int _read(char *buffer, int length);
tylerjw 0:b553aa902f90 77 int _write(const char *buffer, int length);
tylerjw 0:b553aa902f90 78 int _sd_sectors();
tylerjw 0:b553aa902f90 79 int _sectors;
tylerjw 0:b553aa902f90 80
tylerjw 0:b553aa902f90 81 SPI _spi;
tylerjw 0:b553aa902f90 82 DigitalOut _cs;
tylerjw 0:b553aa902f90 83 int cdv;
tylerjw 0:b553aa902f90 84 };
tylerjw 0:b553aa902f90 85
tylerjw 0:b553aa902f90 86 #endif