Nitin Shukla / LED_Demo

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Dependencies:   MAX44000 nexpaq_mdk

Fork of LED_Demo by Maxim nexpaq

mbd_os/libraries/fs/sd/SDFileSystem.h@7:3a65ef12ba31, 2016-11-04 (annotated)

Committer:
nitsshukla
Date:
Fri Nov 04 12:06:04 2016 +0000
Revision:
7:3a65ef12ba31
Parent:
1:55a6170b404f 
kghj;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nexpaq 1:55a6170b404f 1 /* mbed Microcontroller Library
nexpaq 1:55a6170b404f 2 * Copyright (c) 2006-2012 ARM Limited
nexpaq 1:55a6170b404f 3 *
nexpaq 1:55a6170b404f 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
nexpaq 1:55a6170b404f 5 * of this software and associated documentation files (the "Software"), to deal
nexpaq 1:55a6170b404f 6 * in the Software without restriction, including without limitation the rights
nexpaq 1:55a6170b404f 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
nexpaq 1:55a6170b404f 8 * copies of the Software, and to permit persons to whom the Software is
nexpaq 1:55a6170b404f 9 * furnished to do so, subject to the following conditions:
nexpaq 1:55a6170b404f 10 *
nexpaq 1:55a6170b404f 11 * The above copyright notice and this permission notice shall be included in
nexpaq 1:55a6170b404f 12 * all copies or substantial portions of the Software.
nexpaq 1:55a6170b404f 13 *
nexpaq 1:55a6170b404f 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
nexpaq 1:55a6170b404f 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
nexpaq 1:55a6170b404f 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
nexpaq 1:55a6170b404f 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
nexpaq 1:55a6170b404f 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
nexpaq 1:55a6170b404f 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
nexpaq 1:55a6170b404f 20 * SOFTWARE.
nexpaq 1:55a6170b404f 21 */
nexpaq 1:55a6170b404f 22 #ifndef MBED_SDFILESYSTEM_H
nexpaq 1:55a6170b404f 23 #define MBED_SDFILESYSTEM_H
nexpaq 1:55a6170b404f 24
nexpaq 1:55a6170b404f 25 #include "mbed.h"
nexpaq 1:55a6170b404f 26 #include "FATFileSystem.h"
nexpaq 1:55a6170b404f 27 #include <stdint.h>
nexpaq 1:55a6170b404f 28
nexpaq 1:55a6170b404f 29 /** Access the filesystem on an SD Card using SPI
nexpaq 1:55a6170b404f 30 *
nexpaq 1:55a6170b404f 31 * @code
nexpaq 1:55a6170b404f 32 * #include "mbed.h"
nexpaq 1:55a6170b404f 33 * #include "SDFileSystem.h"
nexpaq 1:55a6170b404f 34 *
nexpaq 1:55a6170b404f 35 * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
nexpaq 1:55a6170b404f 36 *
nexpaq 1:55a6170b404f 37 * int main() {
nexpaq 1:55a6170b404f 38 * FILE *fp = fopen("/sd/myfile.txt", "w");
nexpaq 1:55a6170b404f 39 * fprintf(fp, "Hello World!\n");
nexpaq 1:55a6170b404f 40 * fclose(fp);
nexpaq 1:55a6170b404f 41 * }
nexpaq 1:55a6170b404f 42 */
nexpaq 1:55a6170b404f 43 class SDFileSystem : public FATFileSystem {
nexpaq 1:55a6170b404f 44 public:
nexpaq 1:55a6170b404f 45
nexpaq 1:55a6170b404f 46 /** Create the File System for accessing an SD Card using SPI
nexpaq 1:55a6170b404f 47 *
nexpaq 1:55a6170b404f 48 * @param mosi SPI mosi pin connected to SD Card
nexpaq 1:55a6170b404f 49 * @param miso SPI miso pin conencted to SD Card
nexpaq 1:55a6170b404f 50 * @param sclk SPI sclk pin connected to SD Card
nexpaq 1:55a6170b404f 51 * @param cs DigitalOut pin used as SD Card chip select
nexpaq 1:55a6170b404f 52 * @param name The name used to access the virtual filesystem
nexpaq 1:55a6170b404f 53 */
nexpaq 1:55a6170b404f 54 SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name);
nexpaq 1:55a6170b404f 55 virtual int disk_initialize();
nexpaq 1:55a6170b404f 56 virtual int disk_status();
nexpaq 1:55a6170b404f 57 virtual int disk_read(uint8_t* buffer, uint32_t block_number, uint32_t count);
nexpaq 1:55a6170b404f 58 virtual int disk_write(const uint8_t* buffer, uint32_t block_number, uint32_t count);
nexpaq 1:55a6170b404f 59 virtual int disk_sync();
nexpaq 1:55a6170b404f 60 virtual uint32_t disk_sectors();
nexpaq 1:55a6170b404f 61
nexpaq 1:55a6170b404f 62 protected:
nexpaq 1:55a6170b404f 63
nexpaq 1:55a6170b404f 64 int _cmd(int cmd, int arg);
nexpaq 1:55a6170b404f 65 int _cmdx(int cmd, int arg);
nexpaq 1:55a6170b404f 66 int _cmd8();
nexpaq 1:55a6170b404f 67 int _cmd58();
nexpaq 1:55a6170b404f 68 int initialise_card();
nexpaq 1:55a6170b404f 69 int initialise_card_v1();
nexpaq 1:55a6170b404f 70 int initialise_card_v2();
nexpaq 1:55a6170b404f 71
nexpaq 1:55a6170b404f 72 int _read(uint8_t * buffer, uint32_t length);
nexpaq 1:55a6170b404f 73 int _write(const uint8_t *buffer, uint32_t length);
nexpaq 1:55a6170b404f 74 uint32_t _sd_sectors();
nexpaq 1:55a6170b404f 75 uint32_t _sectors;
nexpaq 1:55a6170b404f 76
nexpaq 1:55a6170b404f 77 void set_init_sck(uint32_t sck) { _init_sck = sck; }
nexpaq 1:55a6170b404f 78 // Note: The highest SPI clock rate is 20 MHz for MMC and 25 MHz for SD
nexpaq 1:55a6170b404f 79 void set_transfer_sck(uint32_t sck) { _transfer_sck = sck; }
nexpaq 1:55a6170b404f 80 uint32_t _init_sck;
nexpaq 1:55a6170b404f 81 uint32_t _transfer_sck;
nexpaq 1:55a6170b404f 82
nexpaq 1:55a6170b404f 83 SPI _spi;
nexpaq 1:55a6170b404f 84 DigitalOut _cs;
nexpaq 1:55a6170b404f 85 int cdv;
nexpaq 1:55a6170b404f 86 int _is_initialized;
nexpaq 1:55a6170b404f 87 };
nexpaq 1:55a6170b404f 88
nexpaq 1:55a6170b404f 89 #endif