USBHostMSD.h

00001 /* Copyright (c) 2010-2011 mbed.org, MIT License
00002 *
00003 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
00004 * and associated documentation files (the "Software"), to deal in the Software without
00005 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
00006 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
00007 * Software is furnished to do so, subject to the following conditions:
00008 *
00009 * The above copyright notice and this permission notice shall be included in all copies or
00010 * substantial portions of the Software.
00011 *
00012 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
00013 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00014 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00015 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00016 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00017 */
00018 
00019 #ifndef USBHOSTMSD_H
00020 #define USBHOSTMSD_H
00021 
00022 #include "USBHost.h"
00023 #include "FATFileSystem.h"
00024 
00025 class USBHostMSD: public FATFileSystem {
00026 public:
00027     /*
00028     * Constructor
00029     *
00030     * @param rootdir mount name
00031     */
00032     USBHostMSD(const char * rootdir);
00033 
00034     /*
00035     * Check if a serial port device is connected
00036     *
00037     * @returns true if a serial device is connected
00038     */
00039     bool connected();
00040 
00041 protected:
00042     virtual int disk_initialize();
00043     virtual int disk_write(const char *buffer, int block_number);
00044     virtual int disk_read(char *buffer, int block_number);
00045     virtual int disk_sectors();
00046 
00047 private:
00048 
00049     // Bulk-only CBW
00050     typedef __packed struct {
00051         uint32_t Signature;
00052         uint32_t Tag;
00053         uint32_t DataLength;
00054         uint8_t  Flags;
00055         uint8_t  LUN;
00056         uint8_t  CBLength;
00057         uint8_t  CB[16];
00058     } CBW;
00059 
00060     // Bulk-only CSW
00061     typedef __packed struct {
00062         uint32_t Signature;
00063         uint32_t Tag;
00064         uint32_t DataResidue;
00065         uint8_t  Status;
00066     } CSW;
00067 
00068     CBW cbw;
00069     CSW csw;
00070 
00071     int SCSITransfer(uint8_t * cmd, uint8_t cmd_len, int flags, uint8_t * data, uint32_t transfer_len);
00072     int testUnitReady();
00073     int readCapacity();
00074     int dataTransfer(uint8_t * buf, uint32_t block, uint8_t nbBlock, int direction);
00075 
00076     USBHost * host;
00077     USBDeviceConnected * dev;
00078     Endpoint * bulk_in;
00079     Endpoint * bulk_out;
00080     int blockSize;
00081     int blockCount;
00082 };
00083 
00084 #endif