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- /* 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, uint64_t block_number, uint8_t count);
- virtual int disk_write(const uint8_t* buffer, uint64_t block_number, uint8_t count);
- virtual int disk_sync();
- virtual uint64_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);
- uint64_t _sd_sectors();
- uint64_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
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