Diff: SDFlashDisk.h

Revision:

0:99935a94f153

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDFlashDisk.h	Fri Jun 21 16:50:37 2013 +0000
@@ -0,0 +1,85 @@
+/*
+ *  This file is derived from the standard MBED SDFileSystem.h file
+ *  The class defined here provides only low-level block access to the flash disk, with no filesystem.
+ *  
+ *  Modifications by John VanLaanen, June 2013
+*/
+
+// Header from original file:
+
+/* 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_SDFLASHDISK_H
+#define MBED_SDFLASHDISK_H
+ 
+#include "mbed.h"
+#include <stdint.h>
+ 
+/** Access to an SD Flash Card using SPI
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "SDFlashDisk.h"
+ *
+ * SDFlashDisk sd(p5, p6, p7, p12); // mosi, miso, sclk, cs
+ *  
+ * }
+ */
+class SDFlashDisk {
+public:
+ 
+    /** Create the object 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
+     */
+    SDFlashDisk(PinName mosi, PinName miso, PinName sclk, PinName cs);
+    virtual int disk_initialize();
+    virtual int disk_read(uint8_t * buffer, uint64_t block_number);
+    virtual int disk_write(const uint8_t * buffer, uint64_t block_number);
+    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;
+    
+    SPI _spi;
+    DigitalOut _cs;
+    int cdv;
+};
+ 
+#endif  // MBED_SDFLASHDISK_H
+ 
\ No newline at end of file