Cameron Rutherford / SDFileSystem

This is a previous version

Dependencies:   FATFileSystem

Fork of SDFileSystem by Neil Thiessen

SDFileSystem.cpp@23:6bb3c1987511, 2016-04-13 (annotated)

Committer:
neilt6
Date:
Wed Apr 13 16:51:25 2016 +0000
Revision:
23:6bb3c1987511
Parent:
22:3fa5eaf48e81
Child:
24:a52e682a1ce4
Added high-speed mode (50MHz) support for v2.00 or later SD cards

Who changed what in which revision?

UserRevisionLine numberNew contents of line
neilt6 0:2a6d8a096edc 1 /* SD/MMC File System Library
neilt6 22:3fa5eaf48e81 2 * Copyright (c) 2016 Neil Thiessen
neilt6 0:2a6d8a096edc 3 *
neilt6 0:2a6d8a096edc 4 * Licensed under the Apache License, Version 2.0 (the "License");
neilt6 0:2a6d8a096edc 5 * you may not use this file except in compliance with the License.
neilt6 0:2a6d8a096edc 6 * You may obtain a copy of the License at
neilt6 0:2a6d8a096edc 7 *
neilt6 0:2a6d8a096edc 8 * http://www.apache.org/licenses/LICENSE-2.0
neilt6 0:2a6d8a096edc 9 *
neilt6 0:2a6d8a096edc 10 * Unless required by applicable law or agreed to in writing, software
neilt6 0:2a6d8a096edc 11 * distributed under the License is distributed on an "AS IS" BASIS,
neilt6 0:2a6d8a096edc 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
neilt6 0:2a6d8a096edc 13 * See the License for the specific language governing permissions and
neilt6 0:2a6d8a096edc 14 * limitations under the License.
neilt6 0:2a6d8a096edc 15 */
neilt6 0:2a6d8a096edc 16
neilt6 0:2a6d8a096edc 17 #include "SDFileSystem.h"
neilt6 18:2286a4e7fa31 18 #include "diskio.h"
neilt6 15:c9e938f6934f 19 #include "pinmap.h"
neilt6 18:2286a4e7fa31 20 #include "SDCRC.h"
neilt6 0:2a6d8a096edc 21
neilt6 22:3fa5eaf48e81 22 SDFileSystem::SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name, PinName cd, SwitchType cdtype, int hz)
neilt6 22:3fa5eaf48e81 23 : FATFileSystem(name),
neilt6 22:3fa5eaf48e81 24 m_Spi(mosi, miso, sclk),
neilt6 22:3fa5eaf48e81 25 m_Cs(cs, 1),
neilt6 22:3fa5eaf48e81 26 m_Cd(cd),
neilt6 22:3fa5eaf48e81 27 m_FREQ(hz)
neilt6 0:2a6d8a096edc 28 {
neilt6 0:2a6d8a096edc 29 //Initialize the member variables
neilt6 6:55a26a56046a 30 m_CardType = CARD_NONE;
neilt6 7:61db99e52c0d 31 m_Crc = true;
neilt6 6:55a26a56046a 32 m_LargeFrames = false;
neilt6 13:635147efa748 33 m_WriteValidation = true;
neilt6 0:2a6d8a096edc 34 m_Status = STA_NOINIT;
neilt6 0:2a6d8a096edc 35
neilt6 15:c9e938f6934f 36 //Enable the internal pull-up resistor on MISO
neilt6 15:c9e938f6934f 37 pin_mode(miso, PullUp);
neilt6 15:c9e938f6934f 38
neilt6 0:2a6d8a096edc 39 //Configure the SPI bus
neilt6 7:61db99e52c0d 40 m_Spi.format(8, 0);
neilt6 0:2a6d8a096edc 41
neilt6 0:2a6d8a096edc 42 //Configure the card detect pin
neilt6 12:eebddab6eff2 43 if (cdtype == SWITCH_POS_NO) {
neilt6 12:eebddab6eff2 44 m_Cd.mode(PullDown);
neilt6 12:eebddab6eff2 45 m_CdAssert = 1;
neilt6 13:635147efa748 46 m_Cd.fall(this, &SDFileSystem::onCardRemoval);
neilt6 12:eebddab6eff2 47 } else if (cdtype == SWITCH_POS_NC) {
neilt6 12:eebddab6eff2 48 m_Cd.mode(PullDown);
neilt6 12:eebddab6eff2 49 m_CdAssert = 0;
neilt6 13:635147efa748 50 m_Cd.rise(this, &SDFileSystem::onCardRemoval);
neilt6 12:eebddab6eff2 51 } else if (cdtype == SWITCH_NEG_NO) {
neilt6 12:eebddab6eff2 52 m_Cd.mode(PullUp);
neilt6 12:eebddab6eff2 53 m_CdAssert = 0;
neilt6 13:635147efa748 54 m_Cd.rise(this, &SDFileSystem::onCardRemoval);
neilt6 16:c2c1f0b16380 55 } else if (cdtype == SWITCH_NEG_NC) {
neilt6 12:eebddab6eff2 56 m_Cd.mode(PullUp);
neilt6 12:eebddab6eff2 57 m_CdAssert = 1;
neilt6 13:635147efa748 58 m_Cd.fall(this, &SDFileSystem::onCardRemoval);
neilt6 16:c2c1f0b16380 59 } else {
neilt6 16:c2c1f0b16380 60 m_CdAssert = -1;
neilt6 12:eebddab6eff2 61 }
neilt6 0:2a6d8a096edc 62 }
neilt6 0:2a6d8a096edc 63
neilt6 20:2c1e8d442f68 64 bool SDFileSystem::card_present()
neilt6 0:2a6d8a096edc 65 {
neilt6 20:2c1e8d442f68 66 //Check the card socket
neilt6 0:2a6d8a096edc 67 checkSocket();
neilt6 0:2a6d8a096edc 68
neilt6 20:2c1e8d442f68 69 //Return whether or not a card is present
neilt6 20:2c1e8d442f68 70 return !(m_Status & STA_NODISK);
neilt6 20:2c1e8d442f68 71 }
neilt6 0:2a6d8a096edc 72
neilt6 20:2c1e8d442f68 73 SDFileSystem::CardType SDFileSystem::card_type()
neilt6 20:2c1e8d442f68 74 {
neilt6 20:2c1e8d442f68 75 //Check the card socket
neilt6 20:2c1e8d442f68 76 checkSocket();
neilt6 18:2286a4e7fa31 77
neilt6 0:2a6d8a096edc 78 //Return the card type
neilt6 0:2a6d8a096edc 79 return m_CardType;
neilt6 0:2a6d8a096edc 80 }
neilt6 0:2a6d8a096edc 81
neilt6 7:61db99e52c0d 82 bool SDFileSystem::crc()
neilt6 6:55a26a56046a 83 {
neilt6 6:55a26a56046a 84 //Return whether or not CRC is enabled
neilt6 7:61db99e52c0d 85 return m_Crc;
neilt6 6:55a26a56046a 86 }
neilt6 6:55a26a56046a 87
neilt6 7:61db99e52c0d 88 void SDFileSystem::crc(bool enabled)
neilt6 6:55a26a56046a 89 {
neilt6 20:2c1e8d442f68 90 //Check the card socket
neilt6 6:55a26a56046a 91 checkSocket();
neilt6 6:55a26a56046a 92
neilt6 6:55a26a56046a 93 //Just update the member variable if the card isn't initialized
neilt6 6:55a26a56046a 94 if (m_Status & STA_NOINIT) {
neilt6 7:61db99e52c0d 95 m_Crc = enabled;
neilt6 6:55a26a56046a 96 return;
neilt6 6:55a26a56046a 97 }
neilt6 6:55a26a56046a 98
neilt6 6:55a26a56046a 99 //Enable or disable CRC
neilt6 7:61db99e52c0d 100 if (enabled && !m_Crc) {
neilt6 6:55a26a56046a 101 //Send CMD59(0x00000001) to enable CRC
neilt6 7:61db99e52c0d 102 m_Crc = true;
neilt6 11:67ddc53e3983 103 commandTransaction(CMD59, 0x00000001);
neilt6 7:61db99e52c0d 104 } else if (!enabled && m_Crc) {
neilt6 6:55a26a56046a 105 //Send CMD59(0x00000000) to disable CRC
neilt6 11:67ddc53e3983 106 commandTransaction(CMD59, 0x00000000);
neilt6 7:61db99e52c0d 107 m_Crc = false;
neilt6 6:55a26a56046a 108 }
neilt6 6:55a26a56046a 109 }
neilt6 6:55a26a56046a 110
neilt6 6:55a26a56046a 111 bool SDFileSystem::large_frames()
neilt6 6:55a26a56046a 112 {
neilt6 6:55a26a56046a 113 //Return whether or not 16-bit frames are enabled
neilt6 6:55a26a56046a 114 return m_LargeFrames;
neilt6 6:55a26a56046a 115 }
neilt6 6:55a26a56046a 116
neilt6 6:55a26a56046a 117 void SDFileSystem::large_frames(bool enabled)
neilt6 6:55a26a56046a 118 {
neilt6 6:55a26a56046a 119 //Set whether or not 16-bit frames are enabled
neilt6 6:55a26a56046a 120 m_LargeFrames = enabled;
neilt6 6:55a26a56046a 121 }
neilt6 6:55a26a56046a 122
neilt6 13:635147efa748 123 bool SDFileSystem::write_validation()
neilt6 13:635147efa748 124 {
neilt6 13:635147efa748 125 //Return whether or not write validation is enabled
neilt6 13:635147efa748 126 return m_WriteValidation;
neilt6 13:635147efa748 127 }
neilt6 13:635147efa748 128
neilt6 13:635147efa748 129 void SDFileSystem::write_validation(bool enabled)
neilt6 13:635147efa748 130 {
neilt6 13:635147efa748 131 //Set whether or not write validation is enabled
neilt6 13:635147efa748 132 m_WriteValidation = enabled;
neilt6 13:635147efa748 133 }
neilt6 13:635147efa748 134
neilt6 11:67ddc53e3983 135 int SDFileSystem::unmount()
neilt6 11:67ddc53e3983 136 {
neilt6 11:67ddc53e3983 137 //Unmount the filesystem
neilt6 11:67ddc53e3983 138 FATFileSystem::unmount();
neilt6 11:67ddc53e3983 139
neilt6 20:2c1e8d442f68 140 //Change the status to not initialized, and the card type to unknown
neilt6 11:67ddc53e3983 141 m_Status |= STA_NOINIT;
neilt6 20:2c1e8d442f68 142 m_CardType = CARD_UNKNOWN;
neilt6 11:67ddc53e3983 143
neilt6 11:67ddc53e3983 144 //Always succeeds
neilt6 11:67ddc53e3983 145 return 0;
neilt6 11:67ddc53e3983 146 }
neilt6 11:67ddc53e3983 147
neilt6 0:2a6d8a096edc 148 int SDFileSystem::disk_initialize()
neilt6 0:2a6d8a096edc 149 {
neilt6 11:67ddc53e3983 150 char token;
neilt6 11:67ddc53e3983 151 unsigned int resp;
neilt6 0:2a6d8a096edc 152
neilt6 0:2a6d8a096edc 153 //Make sure there's a card in the socket before proceeding
neilt6 0:2a6d8a096edc 154 checkSocket();
neilt6 0:2a6d8a096edc 155 if (m_Status & STA_NODISK)
neilt6 0:2a6d8a096edc 156 return m_Status;
neilt6 0:2a6d8a096edc 157
neilt6 0:2a6d8a096edc 158 //Make sure we're not already initialized before proceeding
neilt6 0:2a6d8a096edc 159 if (!(m_Status & STA_NOINIT))
neilt6 0:2a6d8a096edc 160 return m_Status;
neilt6 0:2a6d8a096edc 161
neilt6 9:1906befe7f30 162 //Set the SPI frequency to 400kHz for initialization
neilt6 9:1906befe7f30 163 m_Spi.frequency(400000);
neilt6 0:2a6d8a096edc 164
neilt6 10:395539a1481a 165 //Send 80 dummy clocks with /CS deasserted and DI held high
neilt6 7:61db99e52c0d 166 m_Cs = 1;
neilt6 0:2a6d8a096edc 167 for (int i = 0; i < 10; i++)
neilt6 7:61db99e52c0d 168 m_Spi.write(0xFF);
neilt6 0:2a6d8a096edc 169
neilt6 12:eebddab6eff2 170 //Send CMD0(0x00000000) to reset the card
neilt6 11:67ddc53e3983 171 if (commandTransaction(CMD0, 0x00000000) != 0x01) {
neilt6 0:2a6d8a096edc 172 //Initialization failed
neilt6 0:2a6d8a096edc 173 m_CardType = CARD_UNKNOWN;
neilt6 0:2a6d8a096edc 174 return m_Status;
neilt6 0:2a6d8a096edc 175 }
neilt6 0:2a6d8a096edc 176
neilt6 11:67ddc53e3983 177 //Send CMD59(0x00000001) to enable CRC if necessary
neilt6 11:67ddc53e3983 178 if (m_Crc) {
neilt6 11:67ddc53e3983 179 if (commandTransaction(CMD59, 0x00000001) != 0x01) {
neilt6 11:67ddc53e3983 180 //Initialization failed
neilt6 11:67ddc53e3983 181 m_CardType = CARD_UNKNOWN;
neilt6 11:67ddc53e3983 182 return m_Status;
neilt6 11:67ddc53e3983 183 }
neilt6 11:67ddc53e3983 184 }
neilt6 11:67ddc53e3983 185
neilt6 12:eebddab6eff2 186 //Send CMD8(0x000001AA) to see if this is an SDCv2 card
neilt6 11:67ddc53e3983 187 if (commandTransaction(CMD8, 0x000001AA, &resp) == 0x01) {
neilt6 0:2a6d8a096edc 188 //This is an SDCv2 card, get the 32-bit return value and verify the voltage range/check pattern
neilt6 11:67ddc53e3983 189 if ((resp & 0xFFF) != 0x1AA) {
neilt6 0:2a6d8a096edc 190 //Initialization failed
neilt6 0:2a6d8a096edc 191 m_CardType = CARD_UNKNOWN;
neilt6 0:2a6d8a096edc 192 return m_Status;
neilt6 0:2a6d8a096edc 193 }
neilt6 0:2a6d8a096edc 194
neilt6 5:6befff2300d0 195 //Send CMD58(0x00000000) to read the OCR, and verify that the card supports 3.2-3.3V
neilt6 11:67ddc53e3983 196 if (commandTransaction(CMD58, 0x00000000, &resp) != 0x01 || !(resp & (1 << 20))) {
neilt6 0:2a6d8a096edc 197 //Initialization failed
neilt6 0:2a6d8a096edc 198 m_CardType = CARD_UNKNOWN;
neilt6 0:2a6d8a096edc 199 return m_Status;
neilt6 0:2a6d8a096edc 200 }
neilt6 0:2a6d8a096edc 201
neilt6 22:3fa5eaf48e81 202 //Try to initialize the card using ACMD41(0x00100000)
neilt6 22:3fa5eaf48e81 203 for (int i = 0; i < 1000; i++) {
neilt6 11:67ddc53e3983 204 token = commandTransaction(ACMD41, 0x40100000);
neilt6 22:3fa5eaf48e81 205 if (token != 0x01) {
neilt6 22:3fa5eaf48e81 206 break;
neilt6 22:3fa5eaf48e81 207 }
neilt6 22:3fa5eaf48e81 208 }
neilt6 0:2a6d8a096edc 209
neilt6 0:2a6d8a096edc 210 //Check if the card initialized
neilt6 11:67ddc53e3983 211 if (token != 0x00) {
neilt6 0:2a6d8a096edc 212 //Initialization failed
neilt6 0:2a6d8a096edc 213 m_CardType = CARD_UNKNOWN;
neilt6 0:2a6d8a096edc 214 return m_Status;
neilt6 0:2a6d8a096edc 215 }
neilt6 0:2a6d8a096edc 216
neilt6 5:6befff2300d0 217 //Send CMD58(0x00000000) to read the OCR
neilt6 11:67ddc53e3983 218 if (commandTransaction(CMD58, 0x00000000, &resp) == 0x00) {
neilt6 0:2a6d8a096edc 219 //Check the CCS bit to determine if this is a high capacity card
neilt6 11:67ddc53e3983 220 if (resp & (1 << 30))
neilt6 0:2a6d8a096edc 221 m_CardType = CARD_SDHC;
neilt6 0:2a6d8a096edc 222 else
neilt6 0:2a6d8a096edc 223 m_CardType = CARD_SD;
neilt6 12:eebddab6eff2 224
neilt6 23:6bb3c1987511 225 //Increase the SPI frequency to full speed (up to 50MHz for SDCv2)
neilt6 23:6bb3c1987511 226 if (m_FREQ > 25000000) {
neilt6 23:6bb3c1987511 227 if (enableHighSpeedMode()) {
neilt6 23:6bb3c1987511 228 if (m_FREQ > 50000000) {
neilt6 23:6bb3c1987511 229 m_Spi.frequency(50000000);
neilt6 23:6bb3c1987511 230 } else {
neilt6 23:6bb3c1987511 231 m_Spi.frequency(m_FREQ);
neilt6 23:6bb3c1987511 232 }
neilt6 23:6bb3c1987511 233 } else {
neilt6 23:6bb3c1987511 234 m_Spi.frequency(25000000);
neilt6 23:6bb3c1987511 235 }
neilt6 23:6bb3c1987511 236 } else {
neilt6 12:eebddab6eff2 237 m_Spi.frequency(m_FREQ);
neilt6 23:6bb3c1987511 238 }
neilt6 0:2a6d8a096edc 239 } else {
neilt6 0:2a6d8a096edc 240 //Initialization failed
neilt6 0:2a6d8a096edc 241 m_CardType = CARD_UNKNOWN;
neilt6 0:2a6d8a096edc 242 return m_Status;
neilt6 0:2a6d8a096edc 243 }
neilt6 0:2a6d8a096edc 244 } else {
neilt6 0:2a6d8a096edc 245 //Didn't respond or illegal command, this is either an SDCv1 or MMC card
neilt6 5:6befff2300d0 246 //Send CMD58(0x00000000) to read the OCR, and verify that the card supports 3.2-3.3V
neilt6 11:67ddc53e3983 247 if (commandTransaction(CMD58, 0x00000000, &resp) != 0x01 || !(resp & (1 << 20))) {
neilt6 0:2a6d8a096edc 248 //Initialization failed
neilt6 0:2a6d8a096edc 249 m_CardType = CARD_UNKNOWN;
neilt6 0:2a6d8a096edc 250 return m_Status;
neilt6 0:2a6d8a096edc 251 }
neilt6 0:2a6d8a096edc 252
neilt6 22:3fa5eaf48e81 253 //Try to initialize the card using ACMD41(0x00100000)
neilt6 22:3fa5eaf48e81 254 for (int i = 0; i < 1000; i++) {
neilt6 22:3fa5eaf48e81 255 token = commandTransaction(ACMD41, 0x40100000);
neilt6 22:3fa5eaf48e81 256 if (token != 0x01) {
neilt6 22:3fa5eaf48e81 257 break;
neilt6 22:3fa5eaf48e81 258 }
neilt6 22:3fa5eaf48e81 259 }
neilt6 0:2a6d8a096edc 260
neilt6 0:2a6d8a096edc 261 //Check if the card initialized
neilt6 11:67ddc53e3983 262 if (token == 0x00) {
neilt6 0:2a6d8a096edc 263 //This is an SDCv1 standard capacity card
neilt6 0:2a6d8a096edc 264 m_CardType = CARD_SD;
neilt6 12:eebddab6eff2 265
neilt6 12:eebddab6eff2 266 //Increase the SPI frequency to full speed (up to 25MHz for SDCv1)
neilt6 12:eebddab6eff2 267 if (m_FREQ > 25000000)
neilt6 12:eebddab6eff2 268 m_Spi.frequency(25000000);
neilt6 12:eebddab6eff2 269 else
neilt6 12:eebddab6eff2 270 m_Spi.frequency(m_FREQ);
neilt6 0:2a6d8a096edc 271 } else {
neilt6 22:3fa5eaf48e81 272 //Try to initialize the card using CMD1(0x00100000)
neilt6 22:3fa5eaf48e81 273 for (int i = 0; i < 1000; i++) {
neilt6 11:67ddc53e3983 274 token = commandTransaction(CMD1, 0x00100000);
neilt6 22:3fa5eaf48e81 275 if (token != 0x01) {
neilt6 22:3fa5eaf48e81 276 break;
neilt6 22:3fa5eaf48e81 277 }
neilt6 22:3fa5eaf48e81 278 }
neilt6 0:2a6d8a096edc 279
neilt6 0:2a6d8a096edc 280 //Check if the card initialized
neilt6 11:67ddc53e3983 281 if (token == 0x00) {
neilt6 0:2a6d8a096edc 282 //This is an MMCv3 card
neilt6 0:2a6d8a096edc 283 m_CardType = CARD_MMC;
neilt6 12:eebddab6eff2 284
neilt6 12:eebddab6eff2 285 //Increase the SPI frequency to full speed (up to 20MHz for MMCv3)
neilt6 12:eebddab6eff2 286 if (m_FREQ > 20000000)
neilt6 12:eebddab6eff2 287 m_Spi.frequency(20000000);
neilt6 12:eebddab6eff2 288 else
neilt6 12:eebddab6eff2 289 m_Spi.frequency(m_FREQ);
neilt6 0:2a6d8a096edc 290 } else {
neilt6 0:2a6d8a096edc 291 //Initialization failed
neilt6 0:2a6d8a096edc 292 m_CardType = CARD_UNKNOWN;
neilt6 0:2a6d8a096edc 293 return m_Status;
neilt6 0:2a6d8a096edc 294 }
neilt6 0:2a6d8a096edc 295 }
neilt6 0:2a6d8a096edc 296 }
neilt6 0:2a6d8a096edc 297
neilt6 12:eebddab6eff2 298 //Send ACMD42(0x00000000) to disconnect the internal pull-up resistor on pin 1 if necessary
neilt6 12:eebddab6eff2 299 if (m_CardType != CARD_MMC) {
neilt6 12:eebddab6eff2 300 if (commandTransaction(ACMD42, 0x00000000) != 0x00) {
neilt6 12:eebddab6eff2 301 //Initialization failed
neilt6 12:eebddab6eff2 302 m_CardType = CARD_UNKNOWN;
neilt6 12:eebddab6eff2 303 return m_Status;
neilt6 12:eebddab6eff2 304 }
neilt6 12:eebddab6eff2 305 }
neilt6 12:eebddab6eff2 306
neilt6 0:2a6d8a096edc 307 //Send CMD16(0x00000200) to force the block size to 512B if necessary
neilt6 0:2a6d8a096edc 308 if (m_CardType != CARD_SDHC) {
neilt6 11:67ddc53e3983 309 if (commandTransaction(CMD16, 0x00000200) != 0x00) {
neilt6 0:2a6d8a096edc 310 //Initialization failed
neilt6 0:2a6d8a096edc 311 m_CardType = CARD_UNKNOWN;
neilt6 0:2a6d8a096edc 312 return m_Status;
neilt6 0:2a6d8a096edc 313 }
neilt6 0:2a6d8a096edc 314 }
neilt6 0:2a6d8a096edc 315
neilt6 0:2a6d8a096edc 316 //The card is now initialized
neilt6 0:2a6d8a096edc 317 m_Status &= ~STA_NOINIT;
neilt6 0:2a6d8a096edc 318
neilt6 9:1906befe7f30 319 //Return the disk status
neilt6 0:2a6d8a096edc 320 return m_Status;
neilt6 0:2a6d8a096edc 321 }
neilt6 0:2a6d8a096edc 322
neilt6 0:2a6d8a096edc 323 int SDFileSystem::disk_status()
neilt6 0:2a6d8a096edc 324 {
neilt6 20:2c1e8d442f68 325 //Check the card socket
neilt6 0:2a6d8a096edc 326 checkSocket();
neilt6 0:2a6d8a096edc 327
neilt6 9:1906befe7f30 328 //Return the disk status
neilt6 0:2a6d8a096edc 329 return m_Status;
neilt6 0:2a6d8a096edc 330 }
neilt6 0:2a6d8a096edc 331
neilt6 21:d10a519c0910 332 int SDFileSystem::disk_read(uint8_t* buffer, uint32_t sector, uint32_t count)
neilt6 0:2a6d8a096edc 333 {
neilt6 9:1906befe7f30 334 //Make sure the card is initialized before proceeding
neilt6 0:2a6d8a096edc 335 if (m_Status & STA_NOINIT)
neilt6 0:2a6d8a096edc 336 return RES_NOTRDY;
neilt6 0:2a6d8a096edc 337
neilt6 11:67ddc53e3983 338 //Read a single block, or multiple blocks
neilt6 11:67ddc53e3983 339 if (count > 1) {
neilt6 13:635147efa748 340 return readBlocks((char*)buffer, sector, count) ? RES_OK : RES_ERROR;
neilt6 11:67ddc53e3983 341 } else {
neilt6 13:635147efa748 342 return readBlock((char*)buffer, sector) ? RES_OK : RES_ERROR;
neilt6 0:2a6d8a096edc 343 }
neilt6 0:2a6d8a096edc 344 }
neilt6 0:2a6d8a096edc 345
neilt6 21:d10a519c0910 346 int SDFileSystem::disk_write(const uint8_t* buffer, uint32_t sector, uint32_t count)
neilt6 0:2a6d8a096edc 347 {
neilt6 9:1906befe7f30 348 //Make sure the card is initialized before proceeding
neilt6 0:2a6d8a096edc 349 if (m_Status & STA_NOINIT)
neilt6 0:2a6d8a096edc 350 return RES_NOTRDY;
neilt6 0:2a6d8a096edc 351
neilt6 9:1906befe7f30 352 //Make sure the card isn't write protected before proceeding
neilt6 0:2a6d8a096edc 353 if (m_Status & STA_PROTECT)
neilt6 0:2a6d8a096edc 354 return RES_WRPRT;
neilt6 0:2a6d8a096edc 355
neilt6 11:67ddc53e3983 356 //Write a single block, or multiple blocks
neilt6 11:67ddc53e3983 357 if (count > 1) {
neilt6 13:635147efa748 358 return writeBlocks((const char*)buffer, sector, count) ? RES_OK : RES_ERROR;
neilt6 11:67ddc53e3983 359 } else {
neilt6 13:635147efa748 360 return writeBlock((const char*)buffer, sector) ? RES_OK : RES_ERROR;
neilt6 0:2a6d8a096edc 361 }
neilt6 0:2a6d8a096edc 362 }
neilt6 0:2a6d8a096edc 363
neilt6 0:2a6d8a096edc 364 int SDFileSystem::disk_sync()
neilt6 0:2a6d8a096edc 365 {
neilt6 0:2a6d8a096edc 366 //Select the card so we're forced to wait for the end of any internal write processes
neilt6 10:395539a1481a 367 if (select()) {
neilt6 10:395539a1481a 368 deselect();
neilt6 10:395539a1481a 369 return RES_OK;
neilt6 10:395539a1481a 370 } else {
neilt6 10:395539a1481a 371 return RES_ERROR;
neilt6 10:395539a1481a 372 }
neilt6 0:2a6d8a096edc 373 }
neilt6 0:2a6d8a096edc 374
neilt6 21:d10a519c0910 375 uint32_t SDFileSystem::disk_sectors()
neilt6 0:2a6d8a096edc 376 {
neilt6 9:1906befe7f30 377 //Make sure the card is initialized before proceeding
neilt6 0:2a6d8a096edc 378 if (m_Status & STA_NOINIT)
neilt6 0:2a6d8a096edc 379 return 0;
neilt6 0:2a6d8a096edc 380
neilt6 0:2a6d8a096edc 381 //Try to read the CSD register up to 3 times
neilt6 11:67ddc53e3983 382 for (int f = 0; f < 3; f++) {
neilt6 11:67ddc53e3983 383 //Select the card, and wait for ready
neilt6 13:635147efa748 384 if(!select())
neilt6 11:67ddc53e3983 385 break;
neilt6 11:67ddc53e3983 386
neilt6 5:6befff2300d0 387 //Send CMD9(0x00000000) to read the CSD register
neilt6 13:635147efa748 388 if (writeCommand(CMD9, 0x00000000) == 0x00) {
neilt6 11:67ddc53e3983 389 //Read the 16B CSD data block
neilt6 0:2a6d8a096edc 390 char csd[16];
neilt6 11:67ddc53e3983 391 bool success = readData(csd, 16);
neilt6 11:67ddc53e3983 392 deselect();
neilt6 11:67ddc53e3983 393 if (success) {
neilt6 0:2a6d8a096edc 394 //Calculate the sector count based on the card type
neilt6 0:2a6d8a096edc 395 if ((csd[0] >> 6) == 0x01) {
neilt6 10:395539a1481a 396 //Calculate the sector count for a high capacity card
neilt6 17:a47f74caa04e 397 unsigned int size = (((csd[7] & 0x3F) << 16) | (csd[8] << 8) | csd[9]) + 1;
neilt6 10:395539a1481a 398 return size << 10;
neilt6 0:2a6d8a096edc 399 } else {
neilt6 10:395539a1481a 400 //Calculate the sector count for a standard capacity card
neilt6 17:a47f74caa04e 401 unsigned int size = (((csd[6] & 0x03) << 10) | (csd[7] << 2) | ((csd[8] & 0xC0) >> 6)) + 1;
neilt6 10:395539a1481a 402 size <<= ((((csd[9] & 0x03) << 1) | ((csd[10] & 0x80) >> 7)) + 2);
neilt6 10:395539a1481a 403 size <<= (csd[5] & 0x0F);
neilt6 10:395539a1481a 404 return size >> 9;
neilt6 0:2a6d8a096edc 405 }
neilt6 0:2a6d8a096edc 406 }
neilt6 0:2a6d8a096edc 407 } else {
neilt6 11:67ddc53e3983 408 //The command failed, get out
neilt6 11:67ddc53e3983 409 break;
neilt6 0:2a6d8a096edc 410 }
neilt6 0:2a6d8a096edc 411 }
neilt6 0:2a6d8a096edc 412
neilt6 9:1906befe7f30 413 //The read operation failed 3 times
neilt6 11:67ddc53e3983 414 deselect();
neilt6 0:2a6d8a096edc 415 return 0;
neilt6 0:2a6d8a096edc 416 }
neilt6 0:2a6d8a096edc 417
neilt6 13:635147efa748 418 void SDFileSystem::onCardRemoval()
neilt6 13:635147efa748 419 {
neilt6 20:2c1e8d442f68 420 //Check the card socket
neilt6 13:635147efa748 421 checkSocket();
neilt6 13:635147efa748 422 }
neilt6 13:635147efa748 423
neilt6 13:635147efa748 424 inline void SDFileSystem::checkSocket()
neilt6 0:2a6d8a096edc 425 {
neilt6 16:c2c1f0b16380 426 //Use the card detect switch (if available) to determine if the socket is occupied
neilt6 20:2c1e8d442f68 427 if (m_CdAssert != -1) {
neilt6 20:2c1e8d442f68 428 if (m_Status & STA_NODISK) {
neilt6 20:2c1e8d442f68 429 if (m_Cd == m_CdAssert) {
neilt6 20:2c1e8d442f68 430 //The socket is now occupied
neilt6 20:2c1e8d442f68 431 m_Status &= ~STA_NODISK;
neilt6 20:2c1e8d442f68 432 m_CardType = CARD_UNKNOWN;
neilt6 20:2c1e8d442f68 433 }
neilt6 20:2c1e8d442f68 434 } else {
neilt6 20:2c1e8d442f68 435 if (m_Cd != m_CdAssert) {
neilt6 20:2c1e8d442f68 436 //The socket is now empty
neilt6 20:2c1e8d442f68 437 m_Status |= (STA_NODISK | STA_NOINIT);
neilt6 20:2c1e8d442f68 438 m_CardType = CARD_NONE;
neilt6 20:2c1e8d442f68 439 }
neilt6 20:2c1e8d442f68 440 }
neilt6 0:2a6d8a096edc 441 }
neilt6 0:2a6d8a096edc 442 }
neilt6 0:2a6d8a096edc 443
neilt6 0:2a6d8a096edc 444 inline bool SDFileSystem::waitReady(int timeout)
neilt6 0:2a6d8a096edc 445 {
neilt6 13:635147efa748 446 char resp;
neilt6 0:2a6d8a096edc 447
neilt6 13:635147efa748 448 //Keep sending dummy clocks with DI held high until the card releases the DO line
neilt6 13:635147efa748 449 m_Timer.start();
neilt6 13:635147efa748 450 do {
neilt6 13:635147efa748 451 resp = m_Spi.write(0xFF);
neilt6 13:635147efa748 452 } while (resp == 0x00 && m_Timer.read_ms() < timeout);
neilt6 13:635147efa748 453 m_Timer.stop();
neilt6 13:635147efa748 454 m_Timer.reset();
neilt6 13:635147efa748 455
neilt6 13:635147efa748 456 //Return success/failure
neilt6 13:635147efa748 457 return (resp > 0x00);
neilt6 0:2a6d8a096edc 458 }
neilt6 0:2a6d8a096edc 459
neilt6 0:2a6d8a096edc 460 inline bool SDFileSystem::select()
neilt6 0:2a6d8a096edc 461 {
neilt6 10:395539a1481a 462 //Assert /CS
neilt6 7:61db99e52c0d 463 m_Cs = 0;
neilt6 0:2a6d8a096edc 464
neilt6 9:1906befe7f30 465 //Send 8 dummy clocks with DI held high to enable DO
neilt6 7:61db99e52c0d 466 m_Spi.write(0xFF);
neilt6 0:2a6d8a096edc 467
neilt6 0:2a6d8a096edc 468 //Wait for up to 500ms for the card to become ready
neilt6 9:1906befe7f30 469 if (waitReady(500)) {
neilt6 0:2a6d8a096edc 470 return true;
neilt6 9:1906befe7f30 471 } else {
neilt6 9:1906befe7f30 472 //We timed out, deselect and return false
neilt6 9:1906befe7f30 473 deselect();
neilt6 9:1906befe7f30 474 return false;
neilt6 9:1906befe7f30 475 }
neilt6 0:2a6d8a096edc 476 }
neilt6 0:2a6d8a096edc 477
neilt6 0:2a6d8a096edc 478 inline void SDFileSystem::deselect()
neilt6 0:2a6d8a096edc 479 {
neilt6 10:395539a1481a 480 //Deassert /CS
neilt6 7:61db99e52c0d 481 m_Cs = 1;
neilt6 0:2a6d8a096edc 482
neilt6 11:67ddc53e3983 483 //Send 8 dummy clocks with DI held high to disable DO
neilt6 7:61db99e52c0d 484 m_Spi.write(0xFF);
neilt6 0:2a6d8a096edc 485 }
neilt6 0:2a6d8a096edc 486
neilt6 11:67ddc53e3983 487 inline char SDFileSystem::commandTransaction(char cmd, unsigned int arg, unsigned int* resp)
neilt6 0:2a6d8a096edc 488 {
neilt6 11:67ddc53e3983 489 //Select the card, and wait for ready
neilt6 13:635147efa748 490 if(!select())
neilt6 11:67ddc53e3983 491 return 0xFF;
neilt6 11:67ddc53e3983 492
neilt6 11:67ddc53e3983 493 //Perform the command transaction
neilt6 13:635147efa748 494 char token = writeCommand(cmd, arg, resp);
neilt6 11:67ddc53e3983 495
neilt6 11:67ddc53e3983 496 //Deselect the card, and return the R1 response token
neilt6 11:67ddc53e3983 497 deselect();
neilt6 11:67ddc53e3983 498 return token;
neilt6 11:67ddc53e3983 499 }
neilt6 11:67ddc53e3983 500
neilt6 13:635147efa748 501 char SDFileSystem::writeCommand(char cmd, unsigned int arg, unsigned int* resp)
neilt6 11:67ddc53e3983 502 {
neilt6 11:67ddc53e3983 503 char token;
neilt6 0:2a6d8a096edc 504
neilt6 0:2a6d8a096edc 505 //Try to send the command up to 3 times
neilt6 11:67ddc53e3983 506 for (int f = 0; f < 3; f++) {
neilt6 5:6befff2300d0 507 //Send CMD55(0x00000000) prior to an application specific command
neilt6 13:635147efa748 508 if (cmd == ACMD22 || cmd == ACMD23 || cmd == ACMD41 || cmd == ACMD42) {
neilt6 13:635147efa748 509 token = writeCommand(CMD55, 0x00000000);
neilt6 11:67ddc53e3983 510 if (token > 0x01)
neilt6 11:67ddc53e3983 511 return token;
neilt6 11:67ddc53e3983 512
neilt6 13:635147efa748 513 //Deselect and reselect the card between CMD55 and an ACMD
neilt6 13:635147efa748 514 deselect();
neilt6 13:635147efa748 515 if(!select())
neilt6 13:635147efa748 516 return 0xFF;
neilt6 0:2a6d8a096edc 517 }
neilt6 0:2a6d8a096edc 518
neilt6 0:2a6d8a096edc 519 //Prepare the command packet
neilt6 0:2a6d8a096edc 520 char cmdPacket[6];
neilt6 4:49b29888eca7 521 cmdPacket[0] = cmd;
neilt6 0:2a6d8a096edc 522 cmdPacket[1] = arg >> 24;
neilt6 0:2a6d8a096edc 523 cmdPacket[2] = arg >> 16;
neilt6 0:2a6d8a096edc 524 cmdPacket[3] = arg >> 8;
neilt6 0:2a6d8a096edc 525 cmdPacket[4] = arg;
neilt6 7:61db99e52c0d 526 if (m_Crc || cmd == CMD0 || cmd == CMD8)
neilt6 18:2286a4e7fa31 527 cmdPacket[5] = (SDCRC::crc7(cmdPacket, 5) << 1) | 0x01;
neilt6 6:55a26a56046a 528 else
neilt6 6:55a26a56046a 529 cmdPacket[5] = 0x01;
neilt6 0:2a6d8a096edc 530
neilt6 0:2a6d8a096edc 531 //Send the command packet
neilt6 11:67ddc53e3983 532 for (int i = 0; i < 6; i++)
neilt6 11:67ddc53e3983 533 m_Spi.write(cmdPacket[i]);
neilt6 0:2a6d8a096edc 534
neilt6 11:67ddc53e3983 535 //Discard the stuff byte immediately following CMD12
neilt6 11:67ddc53e3983 536 if (cmd == CMD12)
neilt6 11:67ddc53e3983 537 m_Spi.write(0xFF);
neilt6 11:67ddc53e3983 538
neilt6 11:67ddc53e3983 539 //Allow up to 8 bytes of delay for the R1 response token
neilt6 11:67ddc53e3983 540 for (int i = 0; i < 9; i++) {
neilt6 11:67ddc53e3983 541 token = m_Spi.write(0xFF);
neilt6 11:67ddc53e3983 542 if (!(token & 0x80))
neilt6 0:2a6d8a096edc 543 break;
neilt6 0:2a6d8a096edc 544 }
neilt6 0:2a6d8a096edc 545
neilt6 11:67ddc53e3983 546 //Verify the R1 response token
neilt6 11:67ddc53e3983 547 if (token == 0xFF) {
neilt6 11:67ddc53e3983 548 //No data was received, get out early
neilt6 11:67ddc53e3983 549 break;
neilt6 11:67ddc53e3983 550 } else if (token & (1 << 3)) {
neilt6 11:67ddc53e3983 551 //There was a CRC error, try again
neilt6 11:67ddc53e3983 552 continue;
neilt6 11:67ddc53e3983 553 } else if (token > 0x01) {
neilt6 11:67ddc53e3983 554 //An error occured, get out early
neilt6 11:67ddc53e3983 555 break;
neilt6 11:67ddc53e3983 556 }
neilt6 0:2a6d8a096edc 557
neilt6 11:67ddc53e3983 558 //Handle R2 and R3/R7 response tokens
neilt6 11:67ddc53e3983 559 if (cmd == CMD13 && resp != NULL) {
neilt6 11:67ddc53e3983 560 //Read the R2 response value
neilt6 11:67ddc53e3983 561 *resp = m_Spi.write(0xFF);
neilt6 11:67ddc53e3983 562 } else if ((cmd == CMD8 || cmd == CMD58) && resp != NULL) {
neilt6 11:67ddc53e3983 563 //Read the R3/R7 response value
neilt6 11:67ddc53e3983 564 *resp = (m_Spi.write(0xFF) << 24);
neilt6 11:67ddc53e3983 565 *resp |= (m_Spi.write(0xFF) << 16);
neilt6 11:67ddc53e3983 566 *resp |= (m_Spi.write(0xFF) << 8);
neilt6 11:67ddc53e3983 567 *resp |= m_Spi.write(0xFF);
neilt6 11:67ddc53e3983 568 }
neilt6 11:67ddc53e3983 569
neilt6 11:67ddc53e3983 570 //The command was successful
neilt6 11:67ddc53e3983 571 break;
neilt6 0:2a6d8a096edc 572 }
neilt6 0:2a6d8a096edc 573
neilt6 11:67ddc53e3983 574 //Return the R1 response token
neilt6 11:67ddc53e3983 575 return token;
neilt6 0:2a6d8a096edc 576 }
neilt6 0:2a6d8a096edc 577
neilt6 0:2a6d8a096edc 578 bool SDFileSystem::readData(char* buffer, int length)
neilt6 0:2a6d8a096edc 579 {
neilt6 0:2a6d8a096edc 580 char token;
neilt6 6:55a26a56046a 581 unsigned short crc;
neilt6 0:2a6d8a096edc 582
neilt6 13:635147efa748 583 //Wait for up to 500ms for a token to arrive
neilt6 13:635147efa748 584 m_Timer.start();
neilt6 13:635147efa748 585 do {
neilt6 7:61db99e52c0d 586 token = m_Spi.write(0xFF);
neilt6 13:635147efa748 587 } while (token == 0xFF && m_Timer.read_ms() < 500);
neilt6 13:635147efa748 588 m_Timer.stop();
neilt6 13:635147efa748 589 m_Timer.reset();
neilt6 0:2a6d8a096edc 590
neilt6 13:635147efa748 591 //Check if a valid start block token was received
neilt6 11:67ddc53e3983 592 if (token != 0xFE)
neilt6 0:2a6d8a096edc 593 return false;
neilt6 6:55a26a56046a 594
neilt6 6:55a26a56046a 595 //Check if large frames are enabled or not
neilt6 6:55a26a56046a 596 if (m_LargeFrames) {
neilt6 6:55a26a56046a 597 //Switch to 16-bit frames for better performance
neilt6 7:61db99e52c0d 598 m_Spi.format(16, 0);
neilt6 0:2a6d8a096edc 599
neilt6 9:1906befe7f30 600 //Read the data block into the buffer
neilt6 6:55a26a56046a 601 unsigned short dataWord;
neilt6 6:55a26a56046a 602 for (int i = 0; i < length; i += 2) {
neilt6 7:61db99e52c0d 603 dataWord = m_Spi.write(0xFFFF);
neilt6 6:55a26a56046a 604 buffer[i] = dataWord >> 8;
neilt6 6:55a26a56046a 605 buffer[i + 1] = dataWord;
neilt6 6:55a26a56046a 606 }
neilt6 6:55a26a56046a 607
neilt6 6:55a26a56046a 608 //Read the CRC16 checksum for the data block
neilt6 7:61db99e52c0d 609 crc = m_Spi.write(0xFFFF);
neilt6 0:2a6d8a096edc 610
neilt6 6:55a26a56046a 611 //Switch back to 8-bit frames
neilt6 7:61db99e52c0d 612 m_Spi.format(8, 0);
neilt6 6:55a26a56046a 613 } else {
neilt6 6:55a26a56046a 614 //Read the data into the buffer
neilt6 6:55a26a56046a 615 for (int i = 0; i < length; i++)
neilt6 7:61db99e52c0d 616 buffer[i] = m_Spi.write(0xFF);
neilt6 6:55a26a56046a 617
neilt6 6:55a26a56046a 618 //Read the CRC16 checksum for the data block
neilt6 7:61db99e52c0d 619 crc = (m_Spi.write(0xFF) << 8);
neilt6 7:61db99e52c0d 620 crc |= m_Spi.write(0xFF);
neilt6 6:55a26a56046a 621 }
neilt6 6:55a26a56046a 622
neilt6 9:1906befe7f30 623 //Return the validity of the CRC16 checksum (if enabled)
neilt6 18:2286a4e7fa31 624 return (!m_Crc || crc == SDCRC::crc16(buffer, length));
neilt6 0:2a6d8a096edc 625 }
neilt6 9:1906befe7f30 626
neilt6 11:67ddc53e3983 627 char SDFileSystem::writeData(const char* buffer, char token)
neilt6 9:1906befe7f30 628 {
neilt6 9:1906befe7f30 629 //Calculate the CRC16 checksum for the data block (if enabled)
neilt6 18:2286a4e7fa31 630 unsigned short crc = (m_Crc) ? SDCRC::crc16(buffer, 512) : 0xFFFF;
neilt6 9:1906befe7f30 631
neilt6 13:635147efa748 632 //Wait for up to 500ms for the card to become ready
neilt6 13:635147efa748 633 if (!waitReady(500))
neilt6 13:635147efa748 634 return false;
neilt6 11:67ddc53e3983 635
neilt6 11:67ddc53e3983 636 //Send the start block token
neilt6 11:67ddc53e3983 637 m_Spi.write(token);
neilt6 11:67ddc53e3983 638
neilt6 9:1906befe7f30 639 //Check if large frames are enabled or not
neilt6 9:1906befe7f30 640 if (m_LargeFrames) {
neilt6 9:1906befe7f30 641 //Switch to 16-bit frames for better performance
neilt6 9:1906befe7f30 642 m_Spi.format(16, 0);
neilt6 9:1906befe7f30 643
neilt6 9:1906befe7f30 644 //Write the data block from the buffer
neilt6 11:67ddc53e3983 645 for (int i = 0; i < 512; i += 2)
neilt6 11:67ddc53e3983 646 m_Spi.write((buffer[i] << 8) | buffer[i + 1]);
neilt6 9:1906befe7f30 647
neilt6 9:1906befe7f30 648 //Send the CRC16 checksum for the data block
neilt6 9:1906befe7f30 649 m_Spi.write(crc);
neilt6 9:1906befe7f30 650
neilt6 9:1906befe7f30 651 //Switch back to 8-bit frames
neilt6 9:1906befe7f30 652 m_Spi.format(8, 0);
neilt6 9:1906befe7f30 653 } else {
neilt6 9:1906befe7f30 654 //Write the data block from the buffer
neilt6 11:67ddc53e3983 655 for (int i = 0; i < 512; i++)
neilt6 11:67ddc53e3983 656 m_Spi.write(buffer[i]);
neilt6 9:1906befe7f30 657
neilt6 9:1906befe7f30 658 //Send the CRC16 checksum for the data block
neilt6 9:1906befe7f30 659 m_Spi.write(crc >> 8);
neilt6 9:1906befe7f30 660 m_Spi.write(crc);
neilt6 9:1906befe7f30 661 }
neilt6 9:1906befe7f30 662
neilt6 11:67ddc53e3983 663 //Return the data response token
neilt6 11:67ddc53e3983 664 return (m_Spi.write(0xFF) & 0x1F);
neilt6 11:67ddc53e3983 665 }
neilt6 11:67ddc53e3983 666
neilt6 17:a47f74caa04e 667 inline bool SDFileSystem::readBlock(char* buffer, unsigned int lba)
neilt6 11:67ddc53e3983 668 {
neilt6 11:67ddc53e3983 669 //Try to read the block up to 3 times
neilt6 11:67ddc53e3983 670 for (int f = 0; f < 3; f++) {
neilt6 11:67ddc53e3983 671 //Select the card, and wait for ready
neilt6 13:635147efa748 672 if(!select())
neilt6 11:67ddc53e3983 673 break;
neilt6 11:67ddc53e3983 674
neilt6 11:67ddc53e3983 675 //Send CMD17(block) to read a single block
neilt6 13:635147efa748 676 if (writeCommand(CMD17, (m_CardType == CARD_SDHC) ? lba : lba << 9) == 0x00) {
neilt6 11:67ddc53e3983 677 //Try to read the block, and deselect the card
neilt6 11:67ddc53e3983 678 bool success = readData(buffer, 512);
neilt6 11:67ddc53e3983 679 deselect();
neilt6 11:67ddc53e3983 680
neilt6 11:67ddc53e3983 681 //Return if successful
neilt6 11:67ddc53e3983 682 if (success)
neilt6 11:67ddc53e3983 683 return true;
neilt6 11:67ddc53e3983 684 } else {
neilt6 11:67ddc53e3983 685 //The command failed, get out
neilt6 11:67ddc53e3983 686 break;
neilt6 11:67ddc53e3983 687 }
neilt6 11:67ddc53e3983 688 }
neilt6 11:67ddc53e3983 689
neilt6 11:67ddc53e3983 690 //The single block read failed
neilt6 11:67ddc53e3983 691 deselect();
neilt6 11:67ddc53e3983 692 return false;
neilt6 11:67ddc53e3983 693 }
neilt6 11:67ddc53e3983 694
neilt6 17:a47f74caa04e 695 inline bool SDFileSystem::readBlocks(char* buffer, unsigned int lba, unsigned int count)
neilt6 11:67ddc53e3983 696 {
neilt6 11:67ddc53e3983 697 //Try to read each block up to 3 times
neilt6 11:67ddc53e3983 698 for (int f = 0; f < 3;) {
neilt6 11:67ddc53e3983 699 //Select the card, and wait for ready
neilt6 13:635147efa748 700 if(!select())
neilt6 11:67ddc53e3983 701 break;
neilt6 9:1906befe7f30 702
neilt6 11:67ddc53e3983 703 //Send CMD18(block) to read multiple blocks
neilt6 13:635147efa748 704 if (writeCommand(CMD18, (m_CardType == CARD_SDHC) ? lba : lba << 9) == 0x00) {
neilt6 11:67ddc53e3983 705 //Try to read all of the data blocks
neilt6 11:67ddc53e3983 706 do {
neilt6 13:635147efa748 707 //Read the next block, and break on errors
neilt6 11:67ddc53e3983 708 if (!readData(buffer, 512)) {
neilt6 11:67ddc53e3983 709 f++;
neilt6 11:67ddc53e3983 710 break;
neilt6 11:67ddc53e3983 711 }
neilt6 11:67ddc53e3983 712
neilt6 11:67ddc53e3983 713 //Update the variables
neilt6 11:67ddc53e3983 714 lba++;
neilt6 11:67ddc53e3983 715 buffer += 512;
neilt6 11:67ddc53e3983 716 f = 0;
neilt6 11:67ddc53e3983 717 } while (--count);
neilt6 11:67ddc53e3983 718
neilt6 11:67ddc53e3983 719 //Send CMD12(0x00000000) to stop the transmission
neilt6 13:635147efa748 720 if (writeCommand(CMD12, 0x00000000) != 0x00) {
neilt6 11:67ddc53e3983 721 //The command failed, get out
neilt6 11:67ddc53e3983 722 break;
neilt6 11:67ddc53e3983 723 }
neilt6 11:67ddc53e3983 724
neilt6 13:635147efa748 725 //Deselect the card, and return if successful
neilt6 11:67ddc53e3983 726 deselect();
neilt6 11:67ddc53e3983 727 if (count == 0)
neilt6 11:67ddc53e3983 728 return true;
neilt6 11:67ddc53e3983 729 } else {
neilt6 11:67ddc53e3983 730 //The command failed, get out
neilt6 11:67ddc53e3983 731 break;
neilt6 11:67ddc53e3983 732 }
neilt6 11:67ddc53e3983 733 }
neilt6 11:67ddc53e3983 734
neilt6 11:67ddc53e3983 735 //The multiple block read failed
neilt6 9:1906befe7f30 736 deselect();
neilt6 11:67ddc53e3983 737 return false;
neilt6 11:67ddc53e3983 738 }
neilt6 9:1906befe7f30 739
neilt6 17:a47f74caa04e 740 inline bool SDFileSystem::writeBlock(const char* buffer, unsigned int lba)
neilt6 11:67ddc53e3983 741 {
neilt6 11:67ddc53e3983 742 //Try to write the block up to 3 times
neilt6 11:67ddc53e3983 743 for (int f = 0; f < 3; f++) {
neilt6 11:67ddc53e3983 744 //Select the card, and wait for ready
neilt6 13:635147efa748 745 if(!select())
neilt6 11:67ddc53e3983 746 break;
neilt6 11:67ddc53e3983 747
neilt6 11:67ddc53e3983 748 //Send CMD24(block) to write a single block
neilt6 13:635147efa748 749 if (writeCommand(CMD24, (m_CardType == CARD_SDHC) ? lba : lba << 9) == 0x00) {
neilt6 11:67ddc53e3983 750 //Try to write the block, and deselect the card
neilt6 11:67ddc53e3983 751 char token = writeData(buffer, 0xFE);
neilt6 11:67ddc53e3983 752 deselect();
neilt6 11:67ddc53e3983 753
neilt6 11:67ddc53e3983 754 //Check the data response token
neilt6 11:67ddc53e3983 755 if (token == 0x0A) {
neilt6 11:67ddc53e3983 756 //A CRC error occured, try again
neilt6 11:67ddc53e3983 757 continue;
neilt6 11:67ddc53e3983 758 } else if (token == 0x0C) {
neilt6 11:67ddc53e3983 759 //A write error occured, get out
neilt6 11:67ddc53e3983 760 break;
neilt6 11:67ddc53e3983 761 }
neilt6 11:67ddc53e3983 762
neilt6 13:635147efa748 763 //Send CMD13(0x00000000) to verify that the programming was successful if enabled
neilt6 13:635147efa748 764 if (m_WriteValidation) {
neilt6 13:635147efa748 765 unsigned int resp;
neilt6 13:635147efa748 766 if (commandTransaction(CMD13, 0x00000000, &resp) != 0x00 || resp != 0x00) {
neilt6 13:635147efa748 767 //Some manner of unrecoverable write error occured during programming, get out
neilt6 13:635147efa748 768 break;
neilt6 13:635147efa748 769 }
neilt6 11:67ddc53e3983 770 }
neilt6 11:67ddc53e3983 771
neilt6 11:67ddc53e3983 772 //The data was written successfully
neilt6 11:67ddc53e3983 773 return true;
neilt6 11:67ddc53e3983 774 } else {
neilt6 11:67ddc53e3983 775 //The command failed, get out
neilt6 11:67ddc53e3983 776 break;
neilt6 11:67ddc53e3983 777 }
neilt6 11:67ddc53e3983 778 }
neilt6 11:67ddc53e3983 779
neilt6 11:67ddc53e3983 780 //The single block write failed
neilt6 11:67ddc53e3983 781 deselect();
neilt6 11:67ddc53e3983 782 return false;
neilt6 9:1906befe7f30 783 }
neilt6 11:67ddc53e3983 784
neilt6 17:a47f74caa04e 785 inline bool SDFileSystem::writeBlocks(const char* buffer, unsigned int lba, unsigned int count)
neilt6 11:67ddc53e3983 786 {
neilt6 11:67ddc53e3983 787 char token;
neilt6 11:67ddc53e3983 788 const char* currentBuffer = buffer;
neilt6 17:a47f74caa04e 789 unsigned int currentLba = lba;
neilt6 11:67ddc53e3983 790 int currentCount = count;
neilt6 11:67ddc53e3983 791
neilt6 11:67ddc53e3983 792 //Try to write each block up to 3 times
neilt6 11:67ddc53e3983 793 for (int f = 0; f < 3;) {
neilt6 11:67ddc53e3983 794 //If this is an SD card, send ACMD23(count) to set the number of blocks to pre-erase
neilt6 11:67ddc53e3983 795 if (m_CardType != CARD_MMC) {
neilt6 11:67ddc53e3983 796 if (commandTransaction(ACMD23, currentCount) != 0x00) {
neilt6 11:67ddc53e3983 797 //The command failed, get out
neilt6 11:67ddc53e3983 798 break;
neilt6 11:67ddc53e3983 799 }
neilt6 11:67ddc53e3983 800 }
neilt6 11:67ddc53e3983 801
neilt6 11:67ddc53e3983 802 //Select the card, and wait for ready
neilt6 13:635147efa748 803 if(!select())
neilt6 11:67ddc53e3983 804 break;
neilt6 11:67ddc53e3983 805
neilt6 11:67ddc53e3983 806 //Send CMD25(block) to write multiple blocks
neilt6 13:635147efa748 807 if (writeCommand(CMD25, (m_CardType == CARD_SDHC) ? currentLba : currentLba << 9) == 0x00) {
neilt6 11:67ddc53e3983 808 //Try to write all of the data blocks
neilt6 11:67ddc53e3983 809 do {
neilt6 11:67ddc53e3983 810 //Write the next block and break on errors
neilt6 11:67ddc53e3983 811 token = writeData(currentBuffer, 0xFC);
neilt6 11:67ddc53e3983 812 if (token != 0x05) {
neilt6 11:67ddc53e3983 813 f++;
neilt6 11:67ddc53e3983 814 break;
neilt6 11:67ddc53e3983 815 }
neilt6 11:67ddc53e3983 816
neilt6 11:67ddc53e3983 817 //Update the variables
neilt6 11:67ddc53e3983 818 currentBuffer += 512;
neilt6 11:67ddc53e3983 819 f = 0;
neilt6 11:67ddc53e3983 820 } while (--currentCount);
neilt6 11:67ddc53e3983 821
neilt6 13:635147efa748 822 //Wait for up to 500ms for the card to finish processing the last block
neilt6 13:635147efa748 823 if (!waitReady(500))
neilt6 13:635147efa748 824 break;
neilt6 11:67ddc53e3983 825
neilt6 11:67ddc53e3983 826 //Finalize the transmission
neilt6 11:67ddc53e3983 827 if (currentCount == 0) {
neilt6 13:635147efa748 828 //Send the stop tran token, and deselect the card
neilt6 11:67ddc53e3983 829 m_Spi.write(0xFD);
neilt6 11:67ddc53e3983 830 deselect();
neilt6 11:67ddc53e3983 831
neilt6 13:635147efa748 832 //Send CMD13(0x00000000) to verify that the programming was successful if enabled
neilt6 13:635147efa748 833 if (m_WriteValidation) {
neilt6 13:635147efa748 834 unsigned int resp;
neilt6 13:635147efa748 835 if (commandTransaction(CMD13, 0x00000000, &resp) != 0x00 || resp != 0x00) {
neilt6 13:635147efa748 836 //Some manner of unrecoverable write error occured during programming, get out
neilt6 13:635147efa748 837 break;
neilt6 13:635147efa748 838 }
neilt6 11:67ddc53e3983 839 }
neilt6 11:67ddc53e3983 840
neilt6 11:67ddc53e3983 841 //The data was written successfully
neilt6 11:67ddc53e3983 842 return true;
neilt6 11:67ddc53e3983 843 } else {
neilt6 11:67ddc53e3983 844 //Send CMD12(0x00000000) to abort the transmission
neilt6 13:635147efa748 845 if (writeCommand(CMD12, 0x00000000) != 0x00) {
neilt6 11:67ddc53e3983 846 //The command failed, get out
neilt6 11:67ddc53e3983 847 break;
neilt6 11:67ddc53e3983 848 }
neilt6 11:67ddc53e3983 849
neilt6 13:635147efa748 850 //Deselect the card
neilt6 11:67ddc53e3983 851 deselect();
neilt6 11:67ddc53e3983 852
neilt6 11:67ddc53e3983 853 //Check the error token
neilt6 11:67ddc53e3983 854 if (token == 0x0A) {
neilt6 11:67ddc53e3983 855 //Determine the number of well written blocks if possible
neilt6 11:67ddc53e3983 856 unsigned int writtenBlocks = 0;
neilt6 13:635147efa748 857 if (m_CardType != CARD_MMC && select()) {
neilt6 11:67ddc53e3983 858 //Send ACMD22(0x00000000) to get the number of well written blocks
neilt6 13:635147efa748 859 if (writeCommand(ACMD22, 0x00000000) == 0x00) {
neilt6 11:67ddc53e3983 860 //Read the data
neilt6 11:67ddc53e3983 861 char acmdData[4];
neilt6 11:67ddc53e3983 862 if (readData(acmdData, 4)) {
neilt6 11:67ddc53e3983 863 //Extract the number of well written blocks
neilt6 11:67ddc53e3983 864 writtenBlocks = acmdData[0] << 24;
neilt6 11:67ddc53e3983 865 writtenBlocks |= acmdData[1] << 16;
neilt6 11:67ddc53e3983 866 writtenBlocks |= acmdData[2] << 8;
neilt6 11:67ddc53e3983 867 writtenBlocks |= acmdData[3];
neilt6 11:67ddc53e3983 868 }
neilt6 11:67ddc53e3983 869 }
neilt6 13:635147efa748 870 deselect();
neilt6 11:67ddc53e3983 871 }
neilt6 11:67ddc53e3983 872
neilt6 11:67ddc53e3983 873 //Roll back the variables based on the number of well written blocks
neilt6 13:635147efa748 874 currentBuffer = buffer + (writtenBlocks << 9);
neilt6 11:67ddc53e3983 875 currentLba = lba + writtenBlocks;
neilt6 11:67ddc53e3983 876 currentCount = count - writtenBlocks;
neilt6 11:67ddc53e3983 877
neilt6 11:67ddc53e3983 878 //Try again
neilt6 11:67ddc53e3983 879 continue;
neilt6 11:67ddc53e3983 880 } else {
neilt6 11:67ddc53e3983 881 //A write error occured, get out
neilt6 11:67ddc53e3983 882 break;
neilt6 11:67ddc53e3983 883 }
neilt6 11:67ddc53e3983 884 }
neilt6 11:67ddc53e3983 885 } else {
neilt6 11:67ddc53e3983 886 //The command failed, get out
neilt6 11:67ddc53e3983 887 break;
neilt6 11:67ddc53e3983 888 }
neilt6 11:67ddc53e3983 889 }
neilt6 11:67ddc53e3983 890
neilt6 11:67ddc53e3983 891 //The multiple block write failed
neilt6 11:67ddc53e3983 892 deselect();
neilt6 11:67ddc53e3983 893 return false;
neilt6 11:67ddc53e3983 894 }
neilt6 23:6bb3c1987511 895
neilt6 23:6bb3c1987511 896 bool SDFileSystem::enableHighSpeedMode()
neilt6 23:6bb3c1987511 897 {
neilt6 23:6bb3c1987511 898 //Try to issue CMD6 up to 3 times
neilt6 23:6bb3c1987511 899 for (int f = 0; f < 3; f++) {
neilt6 23:6bb3c1987511 900 //Select the card, and wait for ready
neilt6 23:6bb3c1987511 901 if(!select())
neilt6 23:6bb3c1987511 902 break;
neilt6 23:6bb3c1987511 903
neilt6 23:6bb3c1987511 904 //Send CMD6(0x80FFFFF1) to change the access mode to high speed
neilt6 23:6bb3c1987511 905 if (writeCommand(CMD6, 0x80FFFFF1) == 0x00) {
neilt6 23:6bb3c1987511 906 //Read the 64B status data block
neilt6 23:6bb3c1987511 907 char status[64];
neilt6 23:6bb3c1987511 908 bool success = readData(status, 64);
neilt6 23:6bb3c1987511 909 deselect();
neilt6 23:6bb3c1987511 910 if (success) {
neilt6 23:6bb3c1987511 911 //Return whether or not the operation was successful
neilt6 23:6bb3c1987511 912 return ((status[16] & 0x0F) == 0x1);
neilt6 23:6bb3c1987511 913 }
neilt6 23:6bb3c1987511 914 } else {
neilt6 23:6bb3c1987511 915 //The command failed, get out
neilt6 23:6bb3c1987511 916 break;
neilt6 23:6bb3c1987511 917 }
neilt6 23:6bb3c1987511 918 }
neilt6 23:6bb3c1987511 919
neilt6 23:6bb3c1987511 920 //The operation failed 3 times
neilt6 23:6bb3c1987511 921 deselect();
neilt6 23:6bb3c1987511 922 return false;
neilt6 23:6bb3c1987511 923 }