Wesley Schon / Mbed 2 deprecated ECE4180Lab3_RTOS

Running multiple threads on mbed using RTOS

Dependencies:   4DGL-uLCD-SE SDFileSystem mbed-rtos mbed wave_player_appbd

USBHostMSD/USBHostMSD.cpp@4:5fdadaef5b1f, 2016-02-29 (annotated)

Committer:
wschon
Date:
Mon Feb 29 03:46:10 2016 +0000
Revision:
4:5fdadaef5b1f
Parent:
1:2129bb91c172 
fixed EVERYTHING

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wschon 1:2129bb91c172 1 /* mbed USBHost Library
wschon 1:2129bb91c172 2 * Copyright (c) 2006-2013 ARM Limited
wschon 1:2129bb91c172 3 *
wschon 1:2129bb91c172 4 * Licensed under the Apache License, Version 2.0 (the "License");
wschon 1:2129bb91c172 5 * you may not use this file except in compliance with the License.
wschon 1:2129bb91c172 6 * You may obtain a copy of the License at
wschon 1:2129bb91c172 7 *
wschon 1:2129bb91c172 8 * http://www.apache.org/licenses/LICENSE-2.0
wschon 1:2129bb91c172 9 *
wschon 1:2129bb91c172 10 * Unless required by applicable law or agreed to in writing, software
wschon 1:2129bb91c172 11 * distributed under the License is distributed on an "AS IS" BASIS,
wschon 1:2129bb91c172 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
wschon 1:2129bb91c172 13 * See the License for the specific language governing permissions and
wschon 1:2129bb91c172 14 * limitations under the License.
wschon 1:2129bb91c172 15 */
wschon 1:2129bb91c172 16
wschon 1:2129bb91c172 17 #include "USBHostMSD.h"
wschon 1:2129bb91c172 18
wschon 1:2129bb91c172 19 #if USBHOST_MSD
wschon 1:2129bb91c172 20
wschon 1:2129bb91c172 21 #include "dbg.h"
wschon 1:2129bb91c172 22
wschon 1:2129bb91c172 23 #define CBW_SIGNATURE 0x43425355
wschon 1:2129bb91c172 24 #define CSW_SIGNATURE 0x53425355
wschon 1:2129bb91c172 25
wschon 1:2129bb91c172 26 #define DEVICE_TO_HOST 0x80
wschon 1:2129bb91c172 27 #define HOST_TO_DEVICE 0x00
wschon 1:2129bb91c172 28
wschon 1:2129bb91c172 29 #define GET_MAX_LUN (0xFE)
wschon 1:2129bb91c172 30 #define BO_MASS_STORAGE_RESET (0xFF)
wschon 1:2129bb91c172 31
wschon 1:2129bb91c172 32 USBHostMSD::USBHostMSD(const char * rootdir) : FATFileSystem(rootdir)
wschon 1:2129bb91c172 33 {
wschon 1:2129bb91c172 34 host = USBHost::getHostInst();
wschon 1:2129bb91c172 35 init();
wschon 1:2129bb91c172 36 }
wschon 1:2129bb91c172 37
wschon 1:2129bb91c172 38 void USBHostMSD::init() {
wschon 1:2129bb91c172 39 dev_connected = false;
wschon 1:2129bb91c172 40 dev = NULL;
wschon 1:2129bb91c172 41 bulk_in = NULL;
wschon 1:2129bb91c172 42 bulk_out = NULL;
wschon 1:2129bb91c172 43 dev_connected = false;
wschon 1:2129bb91c172 44 blockSize = 0;
wschon 1:2129bb91c172 45 blockCount = 0;
wschon 1:2129bb91c172 46 msd_intf = -1;
wschon 1:2129bb91c172 47 msd_device_found = false;
wschon 1:2129bb91c172 48 disk_init = false;
wschon 1:2129bb91c172 49 dev_connected = false;
wschon 1:2129bb91c172 50 nb_ep = 0;
wschon 1:2129bb91c172 51 }
wschon 1:2129bb91c172 52
wschon 1:2129bb91c172 53
wschon 1:2129bb91c172 54 bool USBHostMSD::connected()
wschon 1:2129bb91c172 55 {
wschon 1:2129bb91c172 56 return dev_connected;
wschon 1:2129bb91c172 57 }
wschon 1:2129bb91c172 58
wschon 1:2129bb91c172 59 bool USBHostMSD::connect()
wschon 1:2129bb91c172 60 {
wschon 1:2129bb91c172 61
wschon 1:2129bb91c172 62 if (dev_connected) {
wschon 1:2129bb91c172 63 return true;
wschon 1:2129bb91c172 64 }
wschon 1:2129bb91c172 65
wschon 1:2129bb91c172 66 for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
wschon 1:2129bb91c172 67 if ((dev = host->getDevice(i)) != NULL) {
wschon 1:2129bb91c172 68
wschon 1:2129bb91c172 69 USB_DBG("Trying to connect MSD device\r\n");
wschon 1:2129bb91c172 70
wschon 1:2129bb91c172 71 if(host->enumerate(dev, this))
wschon 1:2129bb91c172 72 break;
wschon 1:2129bb91c172 73
wschon 1:2129bb91c172 74 if (msd_device_found) {
wschon 1:2129bb91c172 75 bulk_in = dev->getEndpoint(msd_intf, BULK_ENDPOINT, IN);
wschon 1:2129bb91c172 76 bulk_out = dev->getEndpoint(msd_intf, BULK_ENDPOINT, OUT);
wschon 1:2129bb91c172 77
wschon 1:2129bb91c172 78 if (!bulk_in || !bulk_out)
wschon 1:2129bb91c172 79 continue;
wschon 1:2129bb91c172 80
wschon 1:2129bb91c172 81 USB_INFO("New MSD device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, msd_intf);
wschon 1:2129bb91c172 82 dev->setName("MSD", msd_intf);
wschon 1:2129bb91c172 83 host->registerDriver(dev, msd_intf, this, &USBHostMSD::init);
wschon 1:2129bb91c172 84
wschon 1:2129bb91c172 85 dev_connected = true;
wschon 1:2129bb91c172 86 return true;
wschon 1:2129bb91c172 87 }
wschon 1:2129bb91c172 88 } //if()
wschon 1:2129bb91c172 89 } //for()
wschon 1:2129bb91c172 90 init();
wschon 1:2129bb91c172 91 return false;
wschon 1:2129bb91c172 92 }
wschon 1:2129bb91c172 93
wschon 1:2129bb91c172 94 /*virtual*/ void USBHostMSD::setVidPid(uint16_t vid, uint16_t pid)
wschon 1:2129bb91c172 95 {
wschon 1:2129bb91c172 96 // we don't check VID/PID for MSD driver
wschon 1:2129bb91c172 97 }
wschon 1:2129bb91c172 98
wschon 1:2129bb91c172 99 /*virtual*/ bool USBHostMSD::parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol) //Must return true if the interface should be parsed
wschon 1:2129bb91c172 100 {
wschon 1:2129bb91c172 101 if ((msd_intf == -1) &&
wschon 1:2129bb91c172 102 (intf_class == MSD_CLASS) &&
wschon 1:2129bb91c172 103 (intf_subclass == 0x06) &&
wschon 1:2129bb91c172 104 (intf_protocol == 0x50)) {
wschon 1:2129bb91c172 105 msd_intf = intf_nb;
wschon 1:2129bb91c172 106 return true;
wschon 1:2129bb91c172 107 }
wschon 1:2129bb91c172 108 return false;
wschon 1:2129bb91c172 109 }
wschon 1:2129bb91c172 110
wschon 1:2129bb91c172 111 /*virtual*/ bool USBHostMSD::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
wschon 1:2129bb91c172 112 {
wschon 1:2129bb91c172 113 if (intf_nb == msd_intf) {
wschon 1:2129bb91c172 114 if (type == BULK_ENDPOINT) {
wschon 1:2129bb91c172 115 nb_ep++;
wschon 1:2129bb91c172 116 if (nb_ep == 2)
wschon 1:2129bb91c172 117 msd_device_found = true;
wschon 1:2129bb91c172 118 return true;
wschon 1:2129bb91c172 119 }
wschon 1:2129bb91c172 120 }
wschon 1:2129bb91c172 121 return false;
wschon 1:2129bb91c172 122 }
wschon 1:2129bb91c172 123
wschon 1:2129bb91c172 124
wschon 1:2129bb91c172 125 int USBHostMSD::testUnitReady() {
wschon 1:2129bb91c172 126 USB_DBG("Test unit ready");
wschon 1:2129bb91c172 127 return SCSITransfer(NULL, 6, DEVICE_TO_HOST, 0, 0);
wschon 1:2129bb91c172 128 }
wschon 1:2129bb91c172 129
wschon 1:2129bb91c172 130
wschon 1:2129bb91c172 131 int USBHostMSD::readCapacity() {
wschon 1:2129bb91c172 132 USB_DBG("Read capacity");
wschon 1:2129bb91c172 133 uint8_t cmd[10] = {0x25,0,0,0,0,0,0,0,0,0};
wschon 1:2129bb91c172 134 uint8_t result[8];
wschon 1:2129bb91c172 135 int status = SCSITransfer(cmd, 10, DEVICE_TO_HOST, result, 8);
wschon 1:2129bb91c172 136 if (status == 0) {
wschon 1:2129bb91c172 137 blockCount = (result[0] << 24) | (result[1] << 16) | (result[2] << 8) | result[3];
wschon 1:2129bb91c172 138 blockSize = (result[4] << 24) | (result[5] << 16) | (result[6] << 8) | result[7];
wschon 1:2129bb91c172 139 USB_INFO("MSD [dev: %p] - blockCount: %lld, blockSize: %d, Capacity: %lld\r\n", dev, blockCount, blockSize, blockCount*blockSize);
wschon 1:2129bb91c172 140 }
wschon 1:2129bb91c172 141 return status;
wschon 1:2129bb91c172 142 }
wschon 1:2129bb91c172 143
wschon 1:2129bb91c172 144
wschon 1:2129bb91c172 145 int USBHostMSD::SCSIRequestSense() {
wschon 1:2129bb91c172 146 USB_DBG("Request sense");
wschon 1:2129bb91c172 147 uint8_t cmd[6] = {0x03,0,0,0,18,0};
wschon 1:2129bb91c172 148 uint8_t result[18];
wschon 1:2129bb91c172 149 int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 18);
wschon 1:2129bb91c172 150 return status;
wschon 1:2129bb91c172 151 }
wschon 1:2129bb91c172 152
wschon 1:2129bb91c172 153
wschon 1:2129bb91c172 154 int USBHostMSD::inquiry(uint8_t lun, uint8_t page_code) {
wschon 1:2129bb91c172 155 USB_DBG("Inquiry");
wschon 1:2129bb91c172 156 uint8_t evpd = (page_code == 0) ? 0 : 1;
wschon 1:2129bb91c172 157 uint8_t cmd[6] = {0x12, (lun << 5) | evpd, page_code, 0, 36, 0};
wschon 1:2129bb91c172 158 uint8_t result[36];
wschon 1:2129bb91c172 159 int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 36);
wschon 1:2129bb91c172 160 if (status == 0) {
wschon 1:2129bb91c172 161 char vid_pid[17];
wschon 1:2129bb91c172 162 memcpy(vid_pid, &result[8], 8);
wschon 1:2129bb91c172 163 vid_pid[8] = 0;
wschon 1:2129bb91c172 164 USB_INFO("MSD [dev: %p] - Vendor ID: %s", dev, vid_pid);
wschon 1:2129bb91c172 165
wschon 1:2129bb91c172 166 memcpy(vid_pid, &result[16], 16);
wschon 1:2129bb91c172 167 vid_pid[16] = 0;
wschon 1:2129bb91c172 168 USB_INFO("MSD [dev: %p] - Product ID: %s", dev, vid_pid);
wschon 1:2129bb91c172 169
wschon 1:2129bb91c172 170 memcpy(vid_pid, &result[32], 4);
wschon 1:2129bb91c172 171 vid_pid[4] = 0;
wschon 1:2129bb91c172 172 USB_INFO("MSD [dev: %p] - Product rev: %s", dev, vid_pid);
wschon 1:2129bb91c172 173 }
wschon 1:2129bb91c172 174 return status;
wschon 1:2129bb91c172 175 }
wschon 1:2129bb91c172 176
wschon 1:2129bb91c172 177 int USBHostMSD::checkResult(uint8_t res, USBEndpoint * ep) {
wschon 1:2129bb91c172 178 // if ep stalled: send clear feature
wschon 1:2129bb91c172 179 if (res == USB_TYPE_STALL_ERROR) {
wschon 1:2129bb91c172 180 res = host->controlWrite( dev,
wschon 1:2129bb91c172 181 USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
wschon 1:2129bb91c172 182 CLEAR_FEATURE,
wschon 1:2129bb91c172 183 0, ep->getAddress(), NULL, 0);
wschon 1:2129bb91c172 184 // set state to IDLE if clear feature successful
wschon 1:2129bb91c172 185 if (res == USB_TYPE_OK) {
wschon 1:2129bb91c172 186 ep->setState(USB_TYPE_IDLE);
wschon 1:2129bb91c172 187 }
wschon 1:2129bb91c172 188 }
wschon 1:2129bb91c172 189
wschon 1:2129bb91c172 190 if (res != USB_TYPE_OK)
wschon 1:2129bb91c172 191 return -1;
wschon 1:2129bb91c172 192
wschon 1:2129bb91c172 193 return 0;
wschon 1:2129bb91c172 194 }
wschon 1:2129bb91c172 195
wschon 1:2129bb91c172 196
wschon 1:2129bb91c172 197 int USBHostMSD::SCSITransfer(uint8_t * cmd, uint8_t cmd_len, int flags, uint8_t * data, uint32_t transfer_len) {
wschon 1:2129bb91c172 198
wschon 1:2129bb91c172 199 int res = 0;
wschon 1:2129bb91c172 200
wschon 1:2129bb91c172 201 cbw.Signature = CBW_SIGNATURE;
wschon 1:2129bb91c172 202 cbw.Tag = 0;
wschon 1:2129bb91c172 203 cbw.DataLength = transfer_len;
wschon 1:2129bb91c172 204 cbw.Flags = flags;
wschon 1:2129bb91c172 205 cbw.LUN = 0;
wschon 1:2129bb91c172 206 cbw.CBLength = cmd_len;
wschon 1:2129bb91c172 207 memset(cbw.CB,0,sizeof(cbw.CB));
wschon 1:2129bb91c172 208 if (cmd) {
wschon 1:2129bb91c172 209 memcpy(cbw.CB,cmd,cmd_len);
wschon 1:2129bb91c172 210 }
wschon 1:2129bb91c172 211
wschon 1:2129bb91c172 212 // send the cbw
wschon 1:2129bb91c172 213 USB_DBG("Send CBW");
wschon 1:2129bb91c172 214 res = host->bulkWrite(dev, bulk_out,(uint8_t *)&cbw, 31);
wschon 1:2129bb91c172 215 if (checkResult(res, bulk_out))
wschon 1:2129bb91c172 216 return -1;
wschon 1:2129bb91c172 217
wschon 1:2129bb91c172 218 // data stage if needed
wschon 1:2129bb91c172 219 if (data) {
wschon 1:2129bb91c172 220 USB_DBG("data stage");
wschon 1:2129bb91c172 221 if (flags == HOST_TO_DEVICE) {
wschon 1:2129bb91c172 222
wschon 1:2129bb91c172 223 res = host->bulkWrite(dev, bulk_out, data, transfer_len);
wschon 1:2129bb91c172 224 if (checkResult(res, bulk_out))
wschon 1:2129bb91c172 225 return -1;
wschon 1:2129bb91c172 226
wschon 1:2129bb91c172 227 } else if (flags == DEVICE_TO_HOST) {
wschon 1:2129bb91c172 228
wschon 1:2129bb91c172 229 res = host->bulkRead(dev, bulk_in, data, transfer_len);
wschon 1:2129bb91c172 230 if (checkResult(res, bulk_in))
wschon 1:2129bb91c172 231 return -1;
wschon 1:2129bb91c172 232 }
wschon 1:2129bb91c172 233 }
wschon 1:2129bb91c172 234
wschon 1:2129bb91c172 235 // status stage
wschon 1:2129bb91c172 236 csw.Signature = 0;
wschon 1:2129bb91c172 237 USB_DBG("Read CSW");
wschon 1:2129bb91c172 238 res = host->bulkRead(dev, bulk_in,(uint8_t *)&csw, 13);
wschon 1:2129bb91c172 239 if (checkResult(res, bulk_in))
wschon 1:2129bb91c172 240 return -1;
wschon 1:2129bb91c172 241
wschon 1:2129bb91c172 242 if (csw.Signature != CSW_SIGNATURE) {
wschon 1:2129bb91c172 243 return -1;
wschon 1:2129bb91c172 244 }
wschon 1:2129bb91c172 245
wschon 1:2129bb91c172 246 USB_DBG("recv csw: status: %d", csw.Status);
wschon 1:2129bb91c172 247
wschon 1:2129bb91c172 248 // ModeSense?
wschon 1:2129bb91c172 249 if ((csw.Status == 1) && (cmd[0] != 0x03)) {
wschon 1:2129bb91c172 250 USB_DBG("request mode sense");
wschon 1:2129bb91c172 251 return SCSIRequestSense();
wschon 1:2129bb91c172 252 }
wschon 1:2129bb91c172 253
wschon 1:2129bb91c172 254 // perform reset recovery
wschon 1:2129bb91c172 255 if ((csw.Status == 2) && (cmd[0] != 0x03)) {
wschon 1:2129bb91c172 256
wschon 1:2129bb91c172 257 // send Bulk-Only Mass Storage Reset request
wschon 1:2129bb91c172 258 res = host->controlWrite( dev,
wschon 1:2129bb91c172 259 USB_RECIPIENT_INTERFACE | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_CLASS,
wschon 1:2129bb91c172 260 BO_MASS_STORAGE_RESET,
wschon 1:2129bb91c172 261 0, msd_intf, NULL, 0);
wschon 1:2129bb91c172 262
wschon 1:2129bb91c172 263 // unstall both endpoints
wschon 1:2129bb91c172 264 res = host->controlWrite( dev,
wschon 1:2129bb91c172 265 USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
wschon 1:2129bb91c172 266 CLEAR_FEATURE,
wschon 1:2129bb91c172 267 0, bulk_in->getAddress(), NULL, 0);
wschon 1:2129bb91c172 268
wschon 1:2129bb91c172 269 res = host->controlWrite( dev,
wschon 1:2129bb91c172 270 USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
wschon 1:2129bb91c172 271 CLEAR_FEATURE,
wschon 1:2129bb91c172 272 0, bulk_out->getAddress(), NULL, 0);
wschon 1:2129bb91c172 273
wschon 1:2129bb91c172 274 }
wschon 1:2129bb91c172 275
wschon 1:2129bb91c172 276 return csw.Status;
wschon 1:2129bb91c172 277 }
wschon 1:2129bb91c172 278
wschon 1:2129bb91c172 279
wschon 1:2129bb91c172 280 int USBHostMSD::dataTransfer(uint8_t * buf, uint32_t block, uint8_t nbBlock, int direction) {
wschon 1:2129bb91c172 281 uint8_t cmd[10];
wschon 1:2129bb91c172 282 memset(cmd,0,10);
wschon 1:2129bb91c172 283 cmd[0] = (direction == DEVICE_TO_HOST) ? 0x28 : 0x2A;
wschon 1:2129bb91c172 284
wschon 1:2129bb91c172 285 cmd[2] = (block >> 24) & 0xff;
wschon 1:2129bb91c172 286 cmd[3] = (block >> 16) & 0xff;
wschon 1:2129bb91c172 287 cmd[4] = (block >> 8) & 0xff;
wschon 1:2129bb91c172 288 cmd[5] = block & 0xff;
wschon 1:2129bb91c172 289
wschon 1:2129bb91c172 290 cmd[7] = (nbBlock >> 8) & 0xff;
wschon 1:2129bb91c172 291 cmd[8] = nbBlock & 0xff;
wschon 1:2129bb91c172 292
wschon 1:2129bb91c172 293 return SCSITransfer(cmd, 10, direction, buf, blockSize*nbBlock);
wschon 1:2129bb91c172 294 }
wschon 1:2129bb91c172 295
wschon 1:2129bb91c172 296 int USBHostMSD::getMaxLun() {
wschon 1:2129bb91c172 297 uint8_t buf[1], res;
wschon 1:2129bb91c172 298 res = host->controlRead( dev, USB_RECIPIENT_INTERFACE | USB_DEVICE_TO_HOST | USB_REQUEST_TYPE_CLASS,
wschon 1:2129bb91c172 299 0xfe, 0, msd_intf, buf, 1);
wschon 1:2129bb91c172 300 USB_DBG("max lun: %d", buf[0]);
wschon 1:2129bb91c172 301 return res;
wschon 1:2129bb91c172 302 }
wschon 1:2129bb91c172 303
wschon 1:2129bb91c172 304 int USBHostMSD::disk_initialize() {
wschon 1:2129bb91c172 305 USB_DBG("FILESYSTEM: init");
wschon 1:2129bb91c172 306 U16 i, timeout = 10;
wschon 1:2129bb91c172 307
wschon 1:2129bb91c172 308 getMaxLun();
wschon 1:2129bb91c172 309
wschon 1:2129bb91c172 310 for (i = 0; i < timeout; i++) {
wschon 1:2129bb91c172 311 Thread::wait(100);
wschon 1:2129bb91c172 312 if (!testUnitReady())
wschon 1:2129bb91c172 313 break;
wschon 1:2129bb91c172 314 }
wschon 1:2129bb91c172 315
wschon 1:2129bb91c172 316 if (i == timeout) {
wschon 1:2129bb91c172 317 disk_init = false;
wschon 1:2129bb91c172 318 return -1;
wschon 1:2129bb91c172 319 }
wschon 1:2129bb91c172 320
wschon 1:2129bb91c172 321 inquiry(0, 0);
wschon 1:2129bb91c172 322 disk_init = 1;
wschon 1:2129bb91c172 323 return readCapacity();
wschon 1:2129bb91c172 324 }
wschon 1:2129bb91c172 325
wschon 1:2129bb91c172 326 int USBHostMSD::disk_write(const uint8_t *buffer, uint64_t block_number) {
wschon 1:2129bb91c172 327 USB_DBG("FILESYSTEM: write block: %lld", block_number);
wschon 1:2129bb91c172 328 if (!disk_init) {
wschon 1:2129bb91c172 329 disk_initialize();
wschon 1:2129bb91c172 330 }
wschon 1:2129bb91c172 331 if (!disk_init)
wschon 1:2129bb91c172 332 return -1;
wschon 1:2129bb91c172 333 return dataTransfer((uint8_t *)buffer, block_number, 1, HOST_TO_DEVICE);
wschon 1:2129bb91c172 334 }
wschon 1:2129bb91c172 335
wschon 1:2129bb91c172 336 int USBHostMSD::disk_read(uint8_t * buffer, uint64_t block_number) {
wschon 1:2129bb91c172 337 USB_DBG("FILESYSTEM: read block %lld", block_number);
wschon 1:2129bb91c172 338 if (!disk_init) {
wschon 1:2129bb91c172 339 disk_initialize();
wschon 1:2129bb91c172 340 }
wschon 1:2129bb91c172 341 if (!disk_init)
wschon 1:2129bb91c172 342 return -1;
wschon 1:2129bb91c172 343 return dataTransfer((uint8_t *)buffer, block_number, 1, DEVICE_TO_HOST);
wschon 1:2129bb91c172 344 }
wschon 1:2129bb91c172 345
wschon 1:2129bb91c172 346 uint64_t USBHostMSD::disk_sectors() {
wschon 1:2129bb91c172 347 USB_DBG("FILESYSTEM: sectors");
wschon 1:2129bb91c172 348 if (!disk_init) {
wschon 1:2129bb91c172 349 disk_initialize();
wschon 1:2129bb91c172 350 }
wschon 1:2129bb91c172 351 if (!disk_init)
wschon 1:2129bb91c172 352 return 0;
wschon 1:2129bb91c172 353 return blockCount;
wschon 1:2129bb91c172 354 }
wschon 1:2129bb91c172 355
wschon 1:2129bb91c172 356 #endif