Kotachi Liu / SDFileSystem

SD card data log

Dependents:   riset_Datalogger

SDFileSystem.h@0:18d80d7403d3, 2019-11-03 (annotated)

Committer:
kotachi
Date:
Sun Nov 03 07:28:09 2019 +0000
Revision:
0:18d80d7403d3
SD card logging system

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kotachi 0:18d80d7403d3 1 /* mbed Microcontroller Library
kotachi 0:18d80d7403d3 2 * Copyright (c) 2006-2012 ARM Limited
kotachi 0:18d80d7403d3 3 *
kotachi 0:18d80d7403d3 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
kotachi 0:18d80d7403d3 5 * of this software and associated documentation files (the "Software"), to deal
kotachi 0:18d80d7403d3 6 * in the Software without restriction, including without limitation the rights
kotachi 0:18d80d7403d3 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
kotachi 0:18d80d7403d3 8 * copies of the Software, and to permit persons to whom the Software is
kotachi 0:18d80d7403d3 9 * furnished to do so, subject to the following conditions:
kotachi 0:18d80d7403d3 10 *
kotachi 0:18d80d7403d3 11 * The above copyright notice and this permission notice shall be included in
kotachi 0:18d80d7403d3 12 * all copies or substantial portions of the Software.
kotachi 0:18d80d7403d3 13 *
kotachi 0:18d80d7403d3 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
kotachi 0:18d80d7403d3 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
kotachi 0:18d80d7403d3 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
kotachi 0:18d80d7403d3 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
kotachi 0:18d80d7403d3 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kotachi 0:18d80d7403d3 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
kotachi 0:18d80d7403d3 20 * SOFTWARE.
kotachi 0:18d80d7403d3 21 */
kotachi 0:18d80d7403d3 22 #ifndef MBED_SDFILESYSTEM_H
kotachi 0:18d80d7403d3 23 #define MBED_SDFILESYSTEM_H
kotachi 0:18d80d7403d3 24
kotachi 0:18d80d7403d3 25 #include "mbed.h"
kotachi 0:18d80d7403d3 26 #include "FATFileSystem.h"
kotachi 0:18d80d7403d3 27 #include <stdint.h>
kotachi 0:18d80d7403d3 28
kotachi 0:18d80d7403d3 29 /** Access the filesystem on an SD Card using SPI
kotachi 0:18d80d7403d3 30 *
kotachi 0:18d80d7403d3 31 * @code
kotachi 0:18d80d7403d3 32 * #include "mbed.h"
kotachi 0:18d80d7403d3 33 * #include "SDFileSystem.h"
kotachi 0:18d80d7403d3 34 *
kotachi 0:18d80d7403d3 35 * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
kotachi 0:18d80d7403d3 36 *
kotachi 0:18d80d7403d3 37 * int main() {
kotachi 0:18d80d7403d3 38 * FILE *fp = fopen("/sd/myfile.txt", "w");
kotachi 0:18d80d7403d3 39 * fprintf(fp, "Hello World!\n");
kotachi 0:18d80d7403d3 40 * fclose(fp);
kotachi 0:18d80d7403d3 41 * }
kotachi 0:18d80d7403d3 42 */
kotachi 0:18d80d7403d3 43 class SDFileSystem : public FATFileSystem {
kotachi 0:18d80d7403d3 44 public:
kotachi 0:18d80d7403d3 45
kotachi 0:18d80d7403d3 46 /** Create the File System for accessing an SD Card using SPI
kotachi 0:18d80d7403d3 47 *
kotachi 0:18d80d7403d3 48 * @param mosi SPI mosi pin connected to SD Card
kotachi 0:18d80d7403d3 49 * @param miso SPI miso pin conencted to SD Card
kotachi 0:18d80d7403d3 50 * @param sclk SPI sclk pin connected to SD Card
kotachi 0:18d80d7403d3 51 * @param cs DigitalOut pin used as SD Card chip select
kotachi 0:18d80d7403d3 52 * @param name The name used to access the virtual filesystem
kotachi 0:18d80d7403d3 53 */
kotachi 0:18d80d7403d3 54 SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name);
kotachi 0:18d80d7403d3 55 virtual int disk_initialize();
kotachi 0:18d80d7403d3 56 virtual int disk_status();
kotachi 0:18d80d7403d3 57 virtual int disk_read(uint8_t* buffer, uint32_t block_number, uint32_t count);
kotachi 0:18d80d7403d3 58 virtual int disk_write(const uint8_t* buffer, uint32_t block_number, uint32_t count);
kotachi 0:18d80d7403d3 59 virtual int disk_sync();
kotachi 0:18d80d7403d3 60 virtual uint32_t disk_sectors();
kotachi 0:18d80d7403d3 61
kotachi 0:18d80d7403d3 62 protected:
kotachi 0:18d80d7403d3 63
kotachi 0:18d80d7403d3 64 int _cmd(int cmd, int arg);
kotachi 0:18d80d7403d3 65 int _cmdx(int cmd, int arg);
kotachi 0:18d80d7403d3 66 int _cmd8();
kotachi 0:18d80d7403d3 67 int _cmd58();
kotachi 0:18d80d7403d3 68 int initialise_card();
kotachi 0:18d80d7403d3 69 int initialise_card_v1();
kotachi 0:18d80d7403d3 70 int initialise_card_v2();
kotachi 0:18d80d7403d3 71
kotachi 0:18d80d7403d3 72 int _read(uint8_t * buffer, uint32_t length);
kotachi 0:18d80d7403d3 73 int _write(const uint8_t *buffer, uint32_t length);
kotachi 0:18d80d7403d3 74 uint32_t _sd_sectors();
kotachi 0:18d80d7403d3 75 uint32_t _sectors;
kotachi 0:18d80d7403d3 76
kotachi 0:18d80d7403d3 77 void set_init_sck(uint32_t sck) { _init_sck = sck; }
kotachi 0:18d80d7403d3 78 // Note: The highest SPI clock rate is 20 MHz for MMC and 25 MHz for SD
kotachi 0:18d80d7403d3 79 void set_transfer_sck(uint32_t sck) { _transfer_sck = sck; }
kotachi 0:18d80d7403d3 80 uint32_t _init_sck;
kotachi 0:18d80d7403d3 81 uint32_t _transfer_sck;
kotachi 0:18d80d7403d3 82
kotachi 0:18d80d7403d3 83 SPI _spi;
kotachi 0:18d80d7403d3 84 DigitalOut _cs;
kotachi 0:18d80d7403d3 85 int cdv;
kotachi 0:18d80d7403d3 86 int _is_initialized;
kotachi 0:18d80d7403d3 87 };
kotachi 0:18d80d7403d3 88
kotachi 0:18d80d7403d3 89 #endif