Seeed Studio / USBDevice

usb device library

Fork of USBDevice by mbed official

USBMSD/USBMSD.h@11:5592a5e874fe, 2013-07-31 (annotated)

Committer:
seeed
Date:
Wed Jul 31 01:12:05 2013 +0000
Revision:
11:5592a5e874fe
Parent:
8:335f2506f422
Child:
10:1e3d126a322b
add meta key

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samux 1:80ab0d068708 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
samux 1:80ab0d068708 2 *
samux 1:80ab0d068708 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:80ab0d068708 4 * and associated documentation files (the "Software"), to deal in the Software without
samux 1:80ab0d068708 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
samux 1:80ab0d068708 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
samux 1:80ab0d068708 7 * Software is furnished to do so, subject to the following conditions:
samux 1:80ab0d068708 8 *
samux 1:80ab0d068708 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:80ab0d068708 10 * substantial portions of the Software.
samux 1:80ab0d068708 11 *
samux 1:80ab0d068708 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:80ab0d068708 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:80ab0d068708 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:80ab0d068708 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:80ab0d068708 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:80ab0d068708 17 */
samux 1:80ab0d068708 18
samux 1:80ab0d068708 19
samux 1:80ab0d068708 20 #ifndef USBMSD_H
samux 1:80ab0d068708 21 #define USBMSD_H
samux 1:80ab0d068708 22
samux 1:80ab0d068708 23 /* These headers are included for child class. */
samux 1:80ab0d068708 24 #include "USBEndpoints.h"
samux 1:80ab0d068708 25 #include "USBDescriptor.h"
samux 1:80ab0d068708 26 #include "USBDevice_Types.h"
samux 1:80ab0d068708 27
samux 1:80ab0d068708 28 #include "USBDevice.h"
samux 1:80ab0d068708 29
samux 1:80ab0d068708 30 /**
samux 1:80ab0d068708 31 * USBMSD class: generic class in order to use all kinds of blocks storage chip
samux 1:80ab0d068708 32 *
samux 1:80ab0d068708 33 * Introduction
samux 1:80ab0d068708 34 *
samux 1:80ab0d068708 35 * The USBMSD implements the MSD protocol. It permits to access a memory chip (flash, sdcard,...)
samux 1:80ab0d068708 36 * from a computer over USB. But this class doesn't work standalone, you need to subclass this class
samux 1:80ab0d068708 37 * and define virtual functions which are called in USBMSD.
samux 1:80ab0d068708 38 *
samux 1:80ab0d068708 39 * How to use this class with your chip ?
samux 1:80ab0d068708 40 *
samux 1:80ab0d068708 41 * You have to inherit and define some pure virtual functions (mandatory step):
samux 1:80ab0d068708 42 * - virtual int disk_read(char * data, int block): function to read a block
samux 1:80ab0d068708 43 * - virtual int disk_write(const char * data, int block): function to write a block
samux 1:80ab0d068708 44 * - virtual int disk_initialize(): function to initialize the memory
samux 1:80ab0d068708 45 * - virtual int disk_sectors(): return the number of blocks
samux 1:80ab0d068708 46 * - virtual int disk_size(): return the memory size
samux 1:80ab0d068708 47 * - virtual int disk_status(): return the status of the storage chip (0: OK, 1: not initialized, 2: no medium in the drive, 4: write protection)
samux 1:80ab0d068708 48 *
samux 1:80ab0d068708 49 * All functions names are compatible with the fat filesystem library. So you can imagine using your own class with
samux 1:80ab0d068708 50 * USBMSD and the fat filesystem library in the same program. Just be careful because there are two different parts which
samux 1:80ab0d068708 51 * will access the sd card. You can do a master/slave system using the disk_status method.
samux 1:80ab0d068708 52 *
samux 1:80ab0d068708 53 * Once these functions defined, you can call connect() (at the end of the constructor of your class for instance)
samux 1:80ab0d068708 54 * of USBMSD to connect your mass storage device. connect() will first call disk_status() to test the status of the disk.
samux 1:80ab0d068708 55 * If disk_status() returns 1 (disk not initialized), then disk_initialize() is called. After this step, connect() will collect information
samux 1:80ab0d068708 56 * such as the number of blocks and the memory size.
samux 1:80ab0d068708 57 */
samux 1:80ab0d068708 58 class USBMSD: public USBDevice {
samux 1:80ab0d068708 59 public:
samux 1:80ab0d068708 60
samux 1:80ab0d068708 61 /**
samux 1:80ab0d068708 62 * Constructor
samux 1:80ab0d068708 63 *
samux 1:80ab0d068708 64 * @param vendor_id Your vendor_id
samux 1:80ab0d068708 65 * @param product_id Your product_id
samux 1:80ab0d068708 66 * @param product_release Your preoduct_release
samux 1:80ab0d068708 67 */
samux 1:80ab0d068708 68 USBMSD(uint16_t vendor_id = 0x0703, uint16_t product_id = 0x0104, uint16_t product_release = 0x0001);
samux 1:80ab0d068708 69
samux 1:80ab0d068708 70 /**
samux 1:80ab0d068708 71 * Connect the USB MSD device. Establish disk initialization before really connect the device.
samux 1:80ab0d068708 72 *
samux 1:80ab0d068708 73 * @returns true if successful
samux 1:80ab0d068708 74 */
samux 1:80ab0d068708 75 bool connect();
samux 1:80ab0d068708 76
samux 1:80ab0d068708 77
samux 1:80ab0d068708 78 protected:
samux 1:80ab0d068708 79
samux 1:80ab0d068708 80 /*
samux 1:80ab0d068708 81 * read a block on a storage chip
samux 1:80ab0d068708 82 *
samux 1:80ab0d068708 83 * @param data pointer where will be stored read data
samux 1:80ab0d068708 84 * @param block block number
samux 1:80ab0d068708 85 * @returns 0 if successful
samux 1:80ab0d068708 86 */
samux 7:f8f057664123 87 virtual int disk_read(uint8_t * data, uint64_t block) = 0;
samux 1:80ab0d068708 88
samux 1:80ab0d068708 89 /*
samux 1:80ab0d068708 90 * write a block on a storage chip
samux 1:80ab0d068708 91 *
samux 1:80ab0d068708 92 * @param data data to write
samux 1:80ab0d068708 93 * @param block block number
samux 1:80ab0d068708 94 * @returns 0 if successful
samux 1:80ab0d068708 95 */
samux 7:f8f057664123 96 virtual int disk_write(const uint8_t * data, uint64_t block) = 0;
samux 1:80ab0d068708 97
samux 1:80ab0d068708 98 /*
samux 1:80ab0d068708 99 * Disk initilization
samux 1:80ab0d068708 100 */
samux 1:80ab0d068708 101 virtual int disk_initialize() = 0;
samux 1:80ab0d068708 102
samux 1:80ab0d068708 103 /*
samux 1:80ab0d068708 104 * Return the number of blocks
samux 1:80ab0d068708 105 *
samux 1:80ab0d068708 106 * @returns number of blocks
samux 1:80ab0d068708 107 */
samux 7:f8f057664123 108 virtual uint64_t disk_sectors() = 0;
samux 1:80ab0d068708 109
samux 1:80ab0d068708 110 /*
samux 1:80ab0d068708 111 * Return memory size
samux 1:80ab0d068708 112 *
samux 1:80ab0d068708 113 * @returns memory size
samux 1:80ab0d068708 114 */
samux 7:f8f057664123 115 virtual uint64_t disk_size() = 0;
samux 1:80ab0d068708 116
samux 1:80ab0d068708 117
samux 1:80ab0d068708 118 /*
samux 1:80ab0d068708 119 * To check the status of the storage chip
samux 1:80ab0d068708 120 *
samux 1:80ab0d068708 121 * @returns status: 0: OK, 1: disk not initialized, 2: no medium in the drive, 4: write protected
samux 1:80ab0d068708 122 */
samux 1:80ab0d068708 123 virtual int disk_status() = 0;
samux 1:80ab0d068708 124
samux 1:80ab0d068708 125 /*
samux 1:80ab0d068708 126 * Get string product descriptor
samux 1:80ab0d068708 127 *
samux 1:80ab0d068708 128 * @returns pointer to the string product descriptor
samux 1:80ab0d068708 129 */
samux 1:80ab0d068708 130 virtual uint8_t * stringIproductDesc();
samux 1:80ab0d068708 131
samux 1:80ab0d068708 132 /*
samux 1:80ab0d068708 133 * Get string interface descriptor
samux 1:80ab0d068708 134 *
samux 1:80ab0d068708 135 * @returns pointer to the string interface descriptor
samux 1:80ab0d068708 136 */
samux 1:80ab0d068708 137 virtual uint8_t * stringIinterfaceDesc();
samux 1:80ab0d068708 138
samux 1:80ab0d068708 139 /*
samux 1:80ab0d068708 140 * Get configuration descriptor
samux 1:80ab0d068708 141 *
samux 1:80ab0d068708 142 * @returns pointer to the configuration descriptor
samux 1:80ab0d068708 143 */
samux 1:80ab0d068708 144 virtual uint8_t * configurationDesc();
samux 1:80ab0d068708 145
samux 1:80ab0d068708 146 /*
samux 1:80ab0d068708 147 * Callback called when a packet is received
samux 1:80ab0d068708 148 */
samux 1:80ab0d068708 149 virtual bool EP2_OUT_callback();
samux 1:80ab0d068708 150
samux 1:80ab0d068708 151 /*
samux 1:80ab0d068708 152 * Callback called when a packet has been sent
samux 1:80ab0d068708 153 */
samux 1:80ab0d068708 154 virtual bool EP2_IN_callback();
samux 1:80ab0d068708 155
samux 1:80ab0d068708 156 /*
samux 1:80ab0d068708 157 * Set configuration of device. Add endpoints
samux 1:80ab0d068708 158 */
samux 1:80ab0d068708 159 virtual bool USBCallback_setConfiguration(uint8_t configuration);
samux 1:80ab0d068708 160
samux 1:80ab0d068708 161 /*
samux 1:80ab0d068708 162 * Callback called to process class specific requests
samux 1:80ab0d068708 163 */
samux 1:80ab0d068708 164 virtual bool USBCallback_request();
samux 1:80ab0d068708 165
samux 1:80ab0d068708 166
samux 1:80ab0d068708 167 private:
samux 1:80ab0d068708 168
samux 1:80ab0d068708 169 // MSC Bulk-only Stage
samux 1:80ab0d068708 170 enum Stage {
samux 1:80ab0d068708 171 READ_CBW, // wait a CBW
samux 1:80ab0d068708 172 ERROR, // error
samux 1:80ab0d068708 173 PROCESS_CBW, // process a CBW request
samux 1:80ab0d068708 174 SEND_CSW, // send a CSW
samux 1:80ab0d068708 175 WAIT_CSW, // wait that a CSW has been effectively sent
samux 1:80ab0d068708 176 };
samux 1:80ab0d068708 177
samux 1:80ab0d068708 178 // Bulk-only CBW
samux 1:80ab0d068708 179 typedef __packed struct {
samux 1:80ab0d068708 180 uint32_t Signature;
samux 1:80ab0d068708 181 uint32_t Tag;
samux 1:80ab0d068708 182 uint32_t DataLength;
samux 1:80ab0d068708 183 uint8_t Flags;
samux 1:80ab0d068708 184 uint8_t LUN;
samux 1:80ab0d068708 185 uint8_t CBLength;
samux 1:80ab0d068708 186 uint8_t CB[16];
samux 1:80ab0d068708 187 } CBW;
samux 1:80ab0d068708 188
samux 1:80ab0d068708 189 // Bulk-only CSW
samux 1:80ab0d068708 190 typedef __packed struct {
samux 1:80ab0d068708 191 uint32_t Signature;
samux 1:80ab0d068708 192 uint32_t Tag;
samux 1:80ab0d068708 193 uint32_t DataResidue;
samux 1:80ab0d068708 194 uint8_t Status;
samux 1:80ab0d068708 195 } CSW;
samux 1:80ab0d068708 196
samux 1:80ab0d068708 197 //state of the bulk-only state machine
samux 1:80ab0d068708 198 Stage stage;
samux 1:80ab0d068708 199
samux 1:80ab0d068708 200 // current CBW
samux 1:80ab0d068708 201 CBW cbw;
samux 1:80ab0d068708 202
samux 1:80ab0d068708 203 // CSW which will be sent
samux 1:80ab0d068708 204 CSW csw;
samux 1:80ab0d068708 205
samux 1:80ab0d068708 206 // addr where will be read or written data
samux 1:80ab0d068708 207 uint32_t addr;
samux 1:80ab0d068708 208
samux 1:80ab0d068708 209 // length of a reading or writing
samux 1:80ab0d068708 210 uint32_t length;
samux 1:80ab0d068708 211
samux 1:80ab0d068708 212 // memory OK (after a memoryVerify)
samux 1:80ab0d068708 213 bool memOK;
samux 1:80ab0d068708 214
samux 1:80ab0d068708 215 // cache in RAM before writing in memory. Useful also to read a block.
samux 1:80ab0d068708 216 uint8_t * page;
samux 1:80ab0d068708 217
samux 1:80ab0d068708 218 int BlockSize;
samux 7:f8f057664123 219 uint64_t MemorySize;
samux 7:f8f057664123 220 uint64_t BlockCount;
samux 1:80ab0d068708 221
samux 1:80ab0d068708 222 void CBWDecode(uint8_t * buf, uint16_t size);
samux 1:80ab0d068708 223 void sendCSW (void);
samux 1:80ab0d068708 224 bool inquiryRequest (void);
samux 1:80ab0d068708 225 bool write (uint8_t * buf, uint16_t size);
samux 1:80ab0d068708 226 bool readFormatCapacity();
samux 1:80ab0d068708 227 bool readCapacity (void);
samux 1:80ab0d068708 228 bool infoTransfer (void);
samux 1:80ab0d068708 229 void memoryRead (void);
samux 1:80ab0d068708 230 bool modeSense6 (void);
samux 1:80ab0d068708 231 void testUnitReady (void);
samux 1:80ab0d068708 232 bool requestSense (void);
samux 1:80ab0d068708 233 void memoryVerify (uint8_t * buf, uint16_t size);
samux 1:80ab0d068708 234 void memoryWrite (uint8_t * buf, uint16_t size);
samux 1:80ab0d068708 235 void reset();
samux 1:80ab0d068708 236 void fail();
samux 1:80ab0d068708 237 };
samux 1:80ab0d068708 238
samux 8:335f2506f422 239 #endif