DECS_2018 / F401RE-USBHost

Usb read

Dependencies:   FATFileSystem

Fork of F401RE-USBHost by Norimasa Okamoto

USBHostMSD/USBHostMSD.cpp@8:6463cd1964c0, 2014-01-31 (annotated)

Committer:
va009039
Date:
Fri Jan 31 13:45:07 2014 +0000
Revision:
8:6463cd1964c0
Parent:
3:a3872f7593e2
Child:
9:7f9f64cf5ded
USB hub support.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
va009039 3:a3872f7593e2 1 /* mbed USBHost Library
va009039 3:a3872f7593e2 2 * Copyright (c) 2006-2013 ARM Limited
va009039 3:a3872f7593e2 3 *
va009039 3:a3872f7593e2 4 * Licensed under the Apache License, Version 2.0 (the "License");
va009039 3:a3872f7593e2 5 * you may not use this file except in compliance with the License.
va009039 3:a3872f7593e2 6 * You may obtain a copy of the License at
va009039 3:a3872f7593e2 7 *
va009039 3:a3872f7593e2 8 * http://www.apache.org/licenses/LICENSE-2.0
va009039 3:a3872f7593e2 9 *
va009039 3:a3872f7593e2 10 * Unless required by applicable law or agreed to in writing, software
va009039 3:a3872f7593e2 11 * distributed under the License is distributed on an "AS IS" BASIS,
va009039 3:a3872f7593e2 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
va009039 3:a3872f7593e2 13 * See the License for the specific language governing permissions and
va009039 3:a3872f7593e2 14 * limitations under the License.
va009039 3:a3872f7593e2 15 */
va009039 3:a3872f7593e2 16
va009039 3:a3872f7593e2 17 #include "USBHostMSD.h"
va009039 3:a3872f7593e2 18
va009039 3:a3872f7593e2 19 #define CBW_SIGNATURE 0x43425355
va009039 3:a3872f7593e2 20 #define CSW_SIGNATURE 0x53425355
va009039 3:a3872f7593e2 21
va009039 3:a3872f7593e2 22 #define DEVICE_TO_HOST 0x80
va009039 3:a3872f7593e2 23 #define HOST_TO_DEVICE 0x00
va009039 3:a3872f7593e2 24
va009039 3:a3872f7593e2 25 #define GET_MAX_LUN (0xFE)
va009039 3:a3872f7593e2 26 #define BO_MASS_STORAGE_RESET (0xFF)
va009039 3:a3872f7593e2 27
va009039 3:a3872f7593e2 28 USBHostMSD::USBHostMSD(const char * rootdir) : FATFileSystem(rootdir)
va009039 3:a3872f7593e2 29 {
va009039 3:a3872f7593e2 30 host = USBHost::getHostInst();
va009039 3:a3872f7593e2 31 init();
va009039 3:a3872f7593e2 32 }
va009039 3:a3872f7593e2 33
va009039 3:a3872f7593e2 34 void USBHostMSD::init() {
va009039 3:a3872f7593e2 35 dev_connected = false;
va009039 3:a3872f7593e2 36 dev = NULL;
va009039 3:a3872f7593e2 37 bulk_in = NULL;
va009039 3:a3872f7593e2 38 bulk_out = NULL;
va009039 3:a3872f7593e2 39 dev_connected = false;
va009039 3:a3872f7593e2 40 blockSize = 0;
va009039 3:a3872f7593e2 41 blockCount = 0;
va009039 8:6463cd1964c0 42 msd_intf = -1;
va009039 3:a3872f7593e2 43 msd_device_found = false;
va009039 3:a3872f7593e2 44 disk_init = false;
va009039 3:a3872f7593e2 45 dev_connected = false;
va009039 3:a3872f7593e2 46 nb_ep = 0;
va009039 3:a3872f7593e2 47 }
va009039 3:a3872f7593e2 48
va009039 3:a3872f7593e2 49 bool USBHostMSD::connected()
va009039 3:a3872f7593e2 50 {
va009039 8:6463cd1964c0 51 return dev_connected;
va009039 3:a3872f7593e2 52 }
va009039 3:a3872f7593e2 53
va009039 3:a3872f7593e2 54 bool USBHostMSD::connect()
va009039 3:a3872f7593e2 55 {
va009039 8:6463cd1964c0 56 if (dev_connected) {
va009039 8:6463cd1964c0 57 return true;
va009039 8:6463cd1964c0 58 }
va009039 8:6463cd1964c0 59
va009039 8:6463cd1964c0 60 for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
va009039 8:6463cd1964c0 61 if ((dev = host->getDevice(i)) != NULL) {
va009039 8:6463cd1964c0 62
va009039 8:6463cd1964c0 63 //USB_DBG("Trying to connect MSD device dev=%p\n", dev);
va009039 8:6463cd1964c0 64
va009039 8:6463cd1964c0 65 if(host->enumerate(dev, this))
va009039 8:6463cd1964c0 66 break;
va009039 8:6463cd1964c0 67
va009039 8:6463cd1964c0 68 if (msd_device_found) {
va009039 8:6463cd1964c0 69 bulk_in = dev->getEndpoint(msd_intf, BULK_ENDPOINT, IN);
va009039 8:6463cd1964c0 70 bulk_out = dev->getEndpoint(msd_intf, BULK_ENDPOINT, OUT);
va009039 8:6463cd1964c0 71
va009039 8:6463cd1964c0 72 if (!bulk_in || !bulk_out)
va009039 8:6463cd1964c0 73 continue;
va009039 8:6463cd1964c0 74
va009039 8:6463cd1964c0 75 USB_INFO("New MSD device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, msd_intf);
va009039 8:6463cd1964c0 76 dev->setName("MSD", msd_intf);
va009039 8:6463cd1964c0 77 host->registerDriver(dev, msd_intf, this, &USBHostMSD::init);
va009039 8:6463cd1964c0 78
va009039 8:6463cd1964c0 79 dev_connected = true;
va009039 8:6463cd1964c0 80 return true;
va009039 8:6463cd1964c0 81 }
va009039 8:6463cd1964c0 82 } //if()
va009039 8:6463cd1964c0 83 } //for()
va009039 8:6463cd1964c0 84 init();
va009039 8:6463cd1964c0 85 return false;
va009039 8:6463cd1964c0 86 }
va009039 8:6463cd1964c0 87
va009039 8:6463cd1964c0 88 /*virtual*/ void USBHostMSD::setVidPid(uint16_t vid, uint16_t pid)
va009039 8:6463cd1964c0 89 {
va009039 8:6463cd1964c0 90 USB_DBG2("vid:%04x pid:%04x", vid, pid);
va009039 8:6463cd1964c0 91 // we don't check VID/PID for MSD driver
va009039 8:6463cd1964c0 92 }
va009039 8:6463cd1964c0 93
va009039 8:6463cd1964c0 94 /*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
va009039 8:6463cd1964c0 95 {
va009039 8:6463cd1964c0 96 USB_DBG2("intf: %d class: %02x %02x %02x", intf_nb, intf_class, intf_subclass, intf_protocol);
va009039 8:6463cd1964c0 97
va009039 8:6463cd1964c0 98 if ((msd_intf == -1) &&
va009039 8:6463cd1964c0 99 (intf_class == MSD_CLASS) &&
va009039 8:6463cd1964c0 100 (intf_subclass == 0x06) &&
va009039 8:6463cd1964c0 101 (intf_protocol == 0x50)) {
va009039 8:6463cd1964c0 102 msd_intf = intf_nb;
va009039 8:6463cd1964c0 103 return true;
va009039 8:6463cd1964c0 104 }
va009039 8:6463cd1964c0 105 return false;
va009039 8:6463cd1964c0 106 }
va009039 8:6463cd1964c0 107
va009039 8:6463cd1964c0 108 /*virtual*/ bool USBHostMSD::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
va009039 8:6463cd1964c0 109 {
va009039 8:6463cd1964c0 110 USB_DBG2("intf_nb=%d type=%d dir=%d", intf_nb, type, dir);
va009039 8:6463cd1964c0 111 if (intf_nb == msd_intf) {
va009039 8:6463cd1964c0 112 if (type == BULK_ENDPOINT) {
va009039 8:6463cd1964c0 113 nb_ep++;
va009039 8:6463cd1964c0 114 if (nb_ep == 2)
va009039 8:6463cd1964c0 115 msd_device_found = true;
va009039 8:6463cd1964c0 116 return true;
va009039 8:6463cd1964c0 117 }
va009039 8:6463cd1964c0 118 }
va009039 8:6463cd1964c0 119 return false;
va009039 3:a3872f7593e2 120 }
va009039 3:a3872f7593e2 121
va009039 3:a3872f7593e2 122 int USBHostMSD::testUnitReady() {
va009039 3:a3872f7593e2 123 USB_DBG("Test unit ready");
va009039 3:a3872f7593e2 124 return SCSITransfer(NULL, 6, DEVICE_TO_HOST, 0, 0);
va009039 3:a3872f7593e2 125 }
va009039 3:a3872f7593e2 126
va009039 3:a3872f7593e2 127
va009039 3:a3872f7593e2 128 int USBHostMSD::readCapacity() {
va009039 3:a3872f7593e2 129 USB_DBG("Read capacity");
va009039 3:a3872f7593e2 130 uint8_t cmd[10] = {0x25,0,0,0,0,0,0,0,0,0};
va009039 3:a3872f7593e2 131 uint8_t result[8];
va009039 3:a3872f7593e2 132 int status = SCSITransfer(cmd, 10, DEVICE_TO_HOST, result, 8);
va009039 3:a3872f7593e2 133 if (status == 0) {
va009039 3:a3872f7593e2 134 blockCount = (result[0] << 24) | (result[1] << 16) | (result[2] << 8) | result[3];
va009039 3:a3872f7593e2 135 blockSize = (result[4] << 24) | (result[5] << 16) | (result[6] << 8) | result[7];
va009039 3:a3872f7593e2 136 USB_INFO("MSD blockCount: %lld, blockSize: %d, Capacity: %lld\r\n", blockCount, blockSize, blockCount*blockSize);
va009039 3:a3872f7593e2 137 }
va009039 3:a3872f7593e2 138 return status;
va009039 3:a3872f7593e2 139 }
va009039 3:a3872f7593e2 140
va009039 3:a3872f7593e2 141
va009039 3:a3872f7593e2 142 int USBHostMSD::SCSIRequestSense() {
va009039 3:a3872f7593e2 143 USB_DBG("Request sense");
va009039 3:a3872f7593e2 144 uint8_t cmd[6] = {0x03,0,0,0,18,0};
va009039 3:a3872f7593e2 145 uint8_t result[18];
va009039 3:a3872f7593e2 146 int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 18);
va009039 3:a3872f7593e2 147 return status;
va009039 3:a3872f7593e2 148 }
va009039 3:a3872f7593e2 149
va009039 3:a3872f7593e2 150
va009039 3:a3872f7593e2 151 int USBHostMSD::inquiry(uint8_t lun, uint8_t page_code) {
va009039 3:a3872f7593e2 152 USB_DBG("Inquiry");
va009039 3:a3872f7593e2 153 uint8_t evpd = (page_code == 0) ? 0 : 1;
va009039 3:a3872f7593e2 154 uint8_t cmd[6] = {0x12, (lun << 5) | evpd, page_code, 0, 36, 0};
va009039 3:a3872f7593e2 155 uint8_t result[36];
va009039 3:a3872f7593e2 156 int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 36);
va009039 3:a3872f7593e2 157 if (status == 0) {
va009039 3:a3872f7593e2 158 char vid_pid[17];
va009039 3:a3872f7593e2 159 memcpy(vid_pid, &result[8], 8);
va009039 3:a3872f7593e2 160 vid_pid[8] = 0;
va009039 3:a3872f7593e2 161 USB_INFO("MSD Vendor ID: %s", vid_pid);
va009039 3:a3872f7593e2 162
va009039 3:a3872f7593e2 163 memcpy(vid_pid, &result[16], 16);
va009039 3:a3872f7593e2 164 vid_pid[16] = 0;
va009039 3:a3872f7593e2 165 USB_INFO("MSD Product ID: %s", vid_pid);
va009039 3:a3872f7593e2 166
va009039 3:a3872f7593e2 167 memcpy(vid_pid, &result[32], 4);
va009039 3:a3872f7593e2 168 vid_pid[4] = 0;
va009039 3:a3872f7593e2 169 USB_INFO("MSD Product rev: %s", vid_pid);
va009039 3:a3872f7593e2 170 }
va009039 3:a3872f7593e2 171 return status;
va009039 3:a3872f7593e2 172 }
va009039 3:a3872f7593e2 173
va009039 3:a3872f7593e2 174 int USBHostMSD::checkResult(uint8_t res, USBEndpoint * ep) {
va009039 3:a3872f7593e2 175 // if ep stalled: send clear feature
va009039 3:a3872f7593e2 176 if (res == USB_TYPE_STALL_ERROR) {
va009039 3:a3872f7593e2 177 res = host->controlWrite(dev,
va009039 3:a3872f7593e2 178 USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
va009039 3:a3872f7593e2 179 CLEAR_FEATURE,
va009039 3:a3872f7593e2 180 0, ep->getAddress(), NULL, 0);
va009039 3:a3872f7593e2 181 // set state to IDLE if clear feature successful
va009039 3:a3872f7593e2 182 if (res == USB_TYPE_OK) {
va009039 3:a3872f7593e2 183 ep->setState(USB_TYPE_IDLE);
va009039 3:a3872f7593e2 184 }
va009039 3:a3872f7593e2 185 }
va009039 3:a3872f7593e2 186
va009039 3:a3872f7593e2 187 if (res != USB_TYPE_OK)
va009039 3:a3872f7593e2 188 return -1;
va009039 3:a3872f7593e2 189
va009039 3:a3872f7593e2 190 return 0;
va009039 3:a3872f7593e2 191 }
va009039 3:a3872f7593e2 192
va009039 3:a3872f7593e2 193
va009039 3:a3872f7593e2 194 int USBHostMSD::SCSITransfer(uint8_t * cmd, uint8_t cmd_len, int flags, uint8_t * data, uint32_t transfer_len) {
va009039 3:a3872f7593e2 195
va009039 3:a3872f7593e2 196 int res = 0;
va009039 3:a3872f7593e2 197
va009039 3:a3872f7593e2 198 cbw.Signature = CBW_SIGNATURE;
va009039 3:a3872f7593e2 199 cbw.Tag = 0;
va009039 3:a3872f7593e2 200 cbw.DataLength = transfer_len;
va009039 3:a3872f7593e2 201 cbw.Flags = flags;
va009039 3:a3872f7593e2 202 cbw.LUN = 0;
va009039 3:a3872f7593e2 203 cbw.CBLength = cmd_len;
va009039 3:a3872f7593e2 204 memset(cbw.CB,0,sizeof(cbw.CB));
va009039 3:a3872f7593e2 205 if (cmd) {
va009039 3:a3872f7593e2 206 memcpy(cbw.CB,cmd,cmd_len);
va009039 3:a3872f7593e2 207 }
va009039 3:a3872f7593e2 208
va009039 3:a3872f7593e2 209 // send the cbw
va009039 3:a3872f7593e2 210 USB_DBG("Send CBW");
va009039 3:a3872f7593e2 211 res = host->bulkWrite(dev, bulk_out,(uint8_t *)&cbw, 31);
va009039 3:a3872f7593e2 212 if (checkResult(res, bulk_out))
va009039 3:a3872f7593e2 213 return -1;
va009039 3:a3872f7593e2 214
va009039 3:a3872f7593e2 215 // data stage if needed
va009039 3:a3872f7593e2 216 if (data) {
va009039 3:a3872f7593e2 217 USB_DBG("data stage");
va009039 3:a3872f7593e2 218 if (flags == HOST_TO_DEVICE) {
va009039 3:a3872f7593e2 219
va009039 3:a3872f7593e2 220 res = host->bulkWrite(dev, bulk_out, data, transfer_len);
va009039 3:a3872f7593e2 221 if (checkResult(res, bulk_out))
va009039 3:a3872f7593e2 222 return -1;
va009039 3:a3872f7593e2 223
va009039 3:a3872f7593e2 224 } else if (flags == DEVICE_TO_HOST) {
va009039 3:a3872f7593e2 225
va009039 3:a3872f7593e2 226 res = host->bulkRead(dev, bulk_in, data, transfer_len);
va009039 3:a3872f7593e2 227 if (checkResult(res, bulk_in))
va009039 3:a3872f7593e2 228 return -1;
va009039 3:a3872f7593e2 229 }
va009039 3:a3872f7593e2 230 }
va009039 3:a3872f7593e2 231
va009039 3:a3872f7593e2 232 // status stage
va009039 3:a3872f7593e2 233 csw.Signature = 0;
va009039 3:a3872f7593e2 234 USB_DBG("Read CSW");
va009039 3:a3872f7593e2 235 res = host->bulkRead(dev, bulk_in,(uint8_t *)&csw, 13);
va009039 3:a3872f7593e2 236 if (checkResult(res, bulk_in))
va009039 3:a3872f7593e2 237 return -1;
va009039 3:a3872f7593e2 238
va009039 3:a3872f7593e2 239 if (csw.Signature != CSW_SIGNATURE) {
va009039 3:a3872f7593e2 240 return -1;
va009039 3:a3872f7593e2 241 }
va009039 3:a3872f7593e2 242
va009039 3:a3872f7593e2 243 USB_DBG("recv csw: status: %d", csw.Status);
va009039 3:a3872f7593e2 244
va009039 3:a3872f7593e2 245 // ModeSense?
va009039 3:a3872f7593e2 246 if ((csw.Status == 1) && (cmd[0] != 0x03)) {
va009039 3:a3872f7593e2 247 USB_DBG("request mode sense");
va009039 3:a3872f7593e2 248 return SCSIRequestSense();
va009039 3:a3872f7593e2 249 }
va009039 3:a3872f7593e2 250
va009039 3:a3872f7593e2 251 // perform reset recovery
va009039 3:a3872f7593e2 252 if ((csw.Status == 2) && (cmd[0] != 0x03)) {
va009039 3:a3872f7593e2 253
va009039 3:a3872f7593e2 254 // send Bulk-Only Mass Storage Reset request
va009039 3:a3872f7593e2 255 res = host->controlWrite( dev,
va009039 3:a3872f7593e2 256 USB_RECIPIENT_INTERFACE | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_CLASS,
va009039 3:a3872f7593e2 257 BO_MASS_STORAGE_RESET,
va009039 3:a3872f7593e2 258 0, msd_intf, NULL, 0);
va009039 3:a3872f7593e2 259
va009039 3:a3872f7593e2 260 // unstall both endpoints
va009039 3:a3872f7593e2 261 res = host->controlWrite( dev,
va009039 3:a3872f7593e2 262 USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
va009039 3:a3872f7593e2 263 CLEAR_FEATURE,
va009039 3:a3872f7593e2 264 0, bulk_in->getAddress(), NULL, 0);
va009039 3:a3872f7593e2 265
va009039 3:a3872f7593e2 266 res = host->controlWrite( dev,
va009039 3:a3872f7593e2 267 USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
va009039 3:a3872f7593e2 268 CLEAR_FEATURE,
va009039 3:a3872f7593e2 269 0, bulk_out->getAddress(), NULL, 0);
va009039 3:a3872f7593e2 270
va009039 3:a3872f7593e2 271 }
va009039 3:a3872f7593e2 272
va009039 3:a3872f7593e2 273 return csw.Status;
va009039 3:a3872f7593e2 274 }
va009039 3:a3872f7593e2 275
va009039 3:a3872f7593e2 276
va009039 3:a3872f7593e2 277 int USBHostMSD::dataTransfer(uint8_t * buf, uint32_t block, uint8_t nbBlock, int direction) {
va009039 3:a3872f7593e2 278 uint8_t cmd[10];
va009039 3:a3872f7593e2 279 memset(cmd,0,10);
va009039 3:a3872f7593e2 280 cmd[0] = (direction == DEVICE_TO_HOST) ? 0x28 : 0x2A;
va009039 3:a3872f7593e2 281
va009039 3:a3872f7593e2 282 cmd[2] = (block >> 24) & 0xff;
va009039 3:a3872f7593e2 283 cmd[3] = (block >> 16) & 0xff;
va009039 3:a3872f7593e2 284 cmd[4] = (block >> 8) & 0xff;
va009039 3:a3872f7593e2 285 cmd[5] = block & 0xff;
va009039 3:a3872f7593e2 286
va009039 3:a3872f7593e2 287 cmd[7] = (nbBlock >> 8) & 0xff;
va009039 3:a3872f7593e2 288 cmd[8] = nbBlock & 0xff;
va009039 3:a3872f7593e2 289
va009039 3:a3872f7593e2 290 return SCSITransfer(cmd, 10, direction, buf, blockSize*nbBlock);
va009039 3:a3872f7593e2 291 }
va009039 3:a3872f7593e2 292
va009039 3:a3872f7593e2 293 int USBHostMSD::getMaxLun() {
va009039 3:a3872f7593e2 294 uint8_t buf[1], res;
va009039 3:a3872f7593e2 295 res = host->controlRead( dev, USB_RECIPIENT_INTERFACE | USB_DEVICE_TO_HOST | USB_REQUEST_TYPE_CLASS,
va009039 3:a3872f7593e2 296 0xfe, 0, msd_intf, buf, 1);
va009039 3:a3872f7593e2 297 USB_DBG("max lun: %d", buf[0]);
va009039 3:a3872f7593e2 298 return res;
va009039 3:a3872f7593e2 299 }
va009039 3:a3872f7593e2 300
va009039 3:a3872f7593e2 301 int USBHostMSD::disk_initialize() {
va009039 3:a3872f7593e2 302 USB_DBG("FILESYSTEM: init");
va009039 3:a3872f7593e2 303 int i, timeout = 10;
va009039 3:a3872f7593e2 304
va009039 3:a3872f7593e2 305 //getMaxLun();
va009039 3:a3872f7593e2 306
va009039 3:a3872f7593e2 307 for (i = 0; i < timeout; i++) {
va009039 3:a3872f7593e2 308 wait_ms(100);
va009039 3:a3872f7593e2 309 if (!testUnitReady())
va009039 3:a3872f7593e2 310 break;
va009039 3:a3872f7593e2 311 }
va009039 3:a3872f7593e2 312
va009039 3:a3872f7593e2 313 if (i == timeout) {
va009039 3:a3872f7593e2 314 disk_init = false;
va009039 3:a3872f7593e2 315 return -1;
va009039 3:a3872f7593e2 316 }
va009039 3:a3872f7593e2 317
va009039 3:a3872f7593e2 318 inquiry(0, 0);
va009039 3:a3872f7593e2 319 disk_init = 1;
va009039 3:a3872f7593e2 320 return readCapacity();
va009039 3:a3872f7593e2 321 }
va009039 3:a3872f7593e2 322
va009039 3:a3872f7593e2 323 int USBHostMSD::disk_write(const uint8_t *buffer, uint64_t block_number) {
va009039 3:a3872f7593e2 324 USB_DBG("FILESYSTEM: write block: %lld", block_number);
va009039 3:a3872f7593e2 325 if (!disk_init) {
va009039 3:a3872f7593e2 326 disk_initialize();
va009039 3:a3872f7593e2 327 }
va009039 3:a3872f7593e2 328 if (!disk_init)
va009039 3:a3872f7593e2 329 return -1;
va009039 3:a3872f7593e2 330 return dataTransfer((uint8_t *)buffer, block_number, 1, HOST_TO_DEVICE);
va009039 3:a3872f7593e2 331 }
va009039 3:a3872f7593e2 332
va009039 3:a3872f7593e2 333 int USBHostMSD::disk_read(uint8_t * buffer, uint64_t block_number) {
va009039 3:a3872f7593e2 334 USB_DBG("FILESYSTEM: read block %lld", block_number);
va009039 3:a3872f7593e2 335 if (!disk_init) {
va009039 3:a3872f7593e2 336 disk_initialize();
va009039 3:a3872f7593e2 337 }
va009039 3:a3872f7593e2 338 if (!disk_init)
va009039 3:a3872f7593e2 339 return -1;
va009039 3:a3872f7593e2 340 return dataTransfer((uint8_t *)buffer, block_number, 1, DEVICE_TO_HOST);
va009039 3:a3872f7593e2 341 }
va009039 3:a3872f7593e2 342
va009039 3:a3872f7593e2 343 uint64_t USBHostMSD::disk_sectors() {
va009039 3:a3872f7593e2 344 USB_DBG("FILESYSTEM: sectors");
va009039 3:a3872f7593e2 345 if (!disk_init) {
va009039 3:a3872f7593e2 346 disk_initialize();
va009039 3:a3872f7593e2 347 }
va009039 3:a3872f7593e2 348 if (!disk_init)
va009039 3:a3872f7593e2 349 return 0;
va009039 3:a3872f7593e2 350 return blockCount;
va009039 3:a3872f7593e2 351 }
va009039 3:a3872f7593e2 352