modified version defaulting to a much higher SPI clock
Dependents: SerialBlockReceiver
Fork of SDFileSystem by
SDFileSystem.h
- Committer:
- maclobdell
- Date:
- 2016-08-24
- Revision:
- 4:3f40cbfe801c
- Parent:
- 3:7b35d1709458
File content as of revision 4:3f40cbfe801c:
/* 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_SDFILESYSTEM_H #define MBED_SDFILESYSTEM_H #include "mbed.h" #include "FATFileSystem.h" #include <stdint.h> /** Access the filesystem on an SD Card using SPI * * @code * #include "mbed.h" * #include "SDFileSystem.h" * * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs * * int main() { * FILE *fp = fopen("/sd/myfile.txt", "w"); * fprintf(fp, "Hello World!\n"); * fclose(fp); * } */ class SDFileSystem : public FATFileSystem { public: /** Create the File System 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 * @param name The name used to access the virtual filesystem */ SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name); virtual int disk_initialize(); virtual int disk_status(); virtual int disk_read(uint8_t* buffer, uint32_t block_number, uint32_t count); virtual int disk_write(const uint8_t* buffer, uint32_t block_number, uint32_t count); virtual int disk_sync(); virtual uint32_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); uint32_t _sd_sectors(); uint32_t _sectors; void set_init_sck(uint32_t sck) { _init_sck = sck; } // Note: The highest SPI clock rate is 20 MHz for MMC and 25 MHz for SD void set_transfer_sck(uint32_t sck) { _transfer_sck = sck; } uint32_t _init_sck; uint32_t _transfer_sck; SPI _spi; DigitalOut _cs; int cdv; int _is_initialized; }; #endif