90 lines
3 KiB
C
90 lines
3 KiB
C
|
/* 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
|