My Marlin configs for Fabrikator Mini and CTC i3 Pro B
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Sd2Card.cpp 23KB

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  1. /* Arduino Sd2Card Library
  2. * Copyright (C) 2009 by William Greiman
  3. *
  4. * This file is part of the Arduino Sd2Card Library
  5. *
  6. * This Library is free software: you can redistribute it and/or modify
  7. * it under the terms of the GNU General Public License as published by
  8. * the Free Software Foundation, either version 3 of the License, or
  9. * (at your option) any later version.
  10. *
  11. * This Library is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14. * GNU General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU General Public License
  17. * along with the Arduino Sd2Card Library. If not, see
  18. * <http://www.gnu.org/licenses/>.
  19. */
  20. #include "Marlin.h"
  21. #if ENABLED(SDSUPPORT)
  22. #include "Sd2Card.h"
  23. //------------------------------------------------------------------------------
  24. #if DISABLED(SOFTWARE_SPI)
  25. // functions for hardware SPI
  26. //------------------------------------------------------------------------------
  27. // make sure SPCR rate is in expected bits
  28. #if (SPR0 != 0 || SPR1 != 1)
  29. #error unexpected SPCR bits
  30. #endif
  31. /**
  32. * Initialize hardware SPI
  33. * Set SCK rate to F_CPU/pow(2, 1 + spiRate) for spiRate [0,6]
  34. */
  35. static void spiInit(uint8_t spiRate) {
  36. // See avr processor documentation
  37. SPCR = _BV(SPE) | _BV(MSTR) | (spiRate >> 1);
  38. SPSR = spiRate & 1 || spiRate == 6 ? 0 : _BV(SPI2X);
  39. }
  40. //------------------------------------------------------------------------------
  41. /** SPI receive a byte */
  42. static uint8_t spiRec() {
  43. SPDR = 0XFF;
  44. while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
  45. return SPDR;
  46. }
  47. //------------------------------------------------------------------------------
  48. /** SPI read data - only one call so force inline */
  49. static inline __attribute__((always_inline))
  50. void spiRead(uint8_t* buf, uint16_t nbyte) {
  51. if (nbyte-- == 0) return;
  52. SPDR = 0XFF;
  53. for (uint16_t i = 0; i < nbyte; i++) {
  54. while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
  55. buf[i] = SPDR;
  56. SPDR = 0XFF;
  57. }
  58. while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
  59. buf[nbyte] = SPDR;
  60. }
  61. //------------------------------------------------------------------------------
  62. /** SPI send a byte */
  63. static void spiSend(uint8_t b) {
  64. SPDR = b;
  65. while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
  66. }
  67. //------------------------------------------------------------------------------
  68. /** SPI send block - only one call so force inline */
  69. static inline __attribute__((always_inline))
  70. void spiSendBlock(uint8_t token, const uint8_t* buf) {
  71. SPDR = token;
  72. for (uint16_t i = 0; i < 512; i += 2) {
  73. while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
  74. SPDR = buf[i];
  75. while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
  76. SPDR = buf[i + 1];
  77. }
  78. while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
  79. }
  80. //------------------------------------------------------------------------------
  81. #else // SOFTWARE_SPI
  82. //------------------------------------------------------------------------------
  83. /** nop to tune soft SPI timing */
  84. #define nop asm volatile ("nop\n\t")
  85. //------------------------------------------------------------------------------
  86. /** Soft SPI receive byte */
  87. static uint8_t spiRec() {
  88. uint8_t data = 0;
  89. // no interrupts during byte receive - about 8 us
  90. cli();
  91. // output pin high - like sending 0XFF
  92. fastDigitalWrite(SPI_MOSI_PIN, HIGH);
  93. for (uint8_t i = 0; i < 8; i++) {
  94. fastDigitalWrite(SPI_SCK_PIN, HIGH);
  95. // adjust so SCK is nice
  96. nop;
  97. nop;
  98. data <<= 1;
  99. if (fastDigitalRead(SPI_MISO_PIN)) data |= 1;
  100. fastDigitalWrite(SPI_SCK_PIN, LOW);
  101. }
  102. // enable interrupts
  103. sei();
  104. return data;
  105. }
  106. //------------------------------------------------------------------------------
  107. /** Soft SPI read data */
  108. static void spiRead(uint8_t* buf, uint16_t nbyte) {
  109. for (uint16_t i = 0; i < nbyte; i++)
  110. buf[i] = spiRec();
  111. }
  112. //------------------------------------------------------------------------------
  113. /** Soft SPI send byte */
  114. static void spiSend(uint8_t data) {
  115. // no interrupts during byte send - about 8 us
  116. cli();
  117. for (uint8_t i = 0; i < 8; i++) {
  118. fastDigitalWrite(SPI_SCK_PIN, LOW);
  119. fastDigitalWrite(SPI_MOSI_PIN, data & 0X80);
  120. data <<= 1;
  121. fastDigitalWrite(SPI_SCK_PIN, HIGH);
  122. }
  123. // hold SCK high for a few ns
  124. nop;
  125. nop;
  126. nop;
  127. nop;
  128. fastDigitalWrite(SPI_SCK_PIN, LOW);
  129. // enable interrupts
  130. sei();
  131. }
  132. //------------------------------------------------------------------------------
  133. /** Soft SPI send block */
  134. void spiSendBlock(uint8_t token, const uint8_t* buf) {
  135. spiSend(token);
  136. for (uint16_t i = 0; i < 512; i++)
  137. spiSend(buf[i]);
  138. }
  139. #endif // SOFTWARE_SPI
  140. //------------------------------------------------------------------------------
  141. // send command and return error code. Return zero for OK
  142. uint8_t Sd2Card::cardCommand(uint8_t cmd, uint32_t arg) {
  143. // select card
  144. chipSelectLow();
  145. // wait up to 300 ms if busy
  146. waitNotBusy(300);
  147. // send command
  148. spiSend(cmd | 0x40);
  149. // send argument
  150. for (int8_t s = 24; s >= 0; s -= 8) spiSend(arg >> s);
  151. // send CRC
  152. uint8_t crc = 0XFF;
  153. if (cmd == CMD0) crc = 0X95; // correct crc for CMD0 with arg 0
  154. if (cmd == CMD8) crc = 0X87; // correct crc for CMD8 with arg 0X1AA
  155. spiSend(crc);
  156. // skip stuff byte for stop read
  157. if (cmd == CMD12) spiRec();
  158. // wait for response
  159. for (uint8_t i = 0; ((status_ = spiRec()) & 0X80) && i != 0XFF; i++) { /* Intentionally left empty */ }
  160. return status_;
  161. }
  162. //------------------------------------------------------------------------------
  163. /**
  164. * Determine the size of an SD flash memory card.
  165. *
  166. * \return The number of 512 byte data blocks in the card
  167. * or zero if an error occurs.
  168. */
  169. uint32_t Sd2Card::cardSize() {
  170. csd_t csd;
  171. if (!readCSD(&csd)) return 0;
  172. if (csd.v1.csd_ver == 0) {
  173. uint8_t read_bl_len = csd.v1.read_bl_len;
  174. uint16_t c_size = (csd.v1.c_size_high << 10)
  175. | (csd.v1.c_size_mid << 2) | csd.v1.c_size_low;
  176. uint8_t c_size_mult = (csd.v1.c_size_mult_high << 1)
  177. | csd.v1.c_size_mult_low;
  178. return (uint32_t)(c_size + 1) << (c_size_mult + read_bl_len - 7);
  179. }
  180. else if (csd.v2.csd_ver == 1) {
  181. uint32_t c_size = ((uint32_t)csd.v2.c_size_high << 16)
  182. | (csd.v2.c_size_mid << 8) | csd.v2.c_size_low;
  183. return (c_size + 1) << 10;
  184. }
  185. else {
  186. error(SD_CARD_ERROR_BAD_CSD);
  187. return 0;
  188. }
  189. }
  190. //------------------------------------------------------------------------------
  191. void Sd2Card::chipSelectHigh() {
  192. digitalWrite(chipSelectPin_, HIGH);
  193. }
  194. //------------------------------------------------------------------------------
  195. void Sd2Card::chipSelectLow() {
  196. #if DISABLED(SOFTWARE_SPI)
  197. spiInit(spiRate_);
  198. #endif // SOFTWARE_SPI
  199. digitalWrite(chipSelectPin_, LOW);
  200. }
  201. //------------------------------------------------------------------------------
  202. /** Erase a range of blocks.
  203. *
  204. * \param[in] firstBlock The address of the first block in the range.
  205. * \param[in] lastBlock The address of the last block in the range.
  206. *
  207. * \note This function requests the SD card to do a flash erase for a
  208. * range of blocks. The data on the card after an erase operation is
  209. * either 0 or 1, depends on the card vendor. The card must support
  210. * single block erase.
  211. *
  212. * \return The value one, true, is returned for success and
  213. * the value zero, false, is returned for failure.
  214. */
  215. bool Sd2Card::erase(uint32_t firstBlock, uint32_t lastBlock) {
  216. csd_t csd;
  217. if (!readCSD(&csd)) goto fail;
  218. // check for single block erase
  219. if (!csd.v1.erase_blk_en) {
  220. // erase size mask
  221. uint8_t m = (csd.v1.sector_size_high << 1) | csd.v1.sector_size_low;
  222. if ((firstBlock & m) != 0 || ((lastBlock + 1) & m) != 0) {
  223. // error card can't erase specified area
  224. error(SD_CARD_ERROR_ERASE_SINGLE_BLOCK);
  225. goto fail;
  226. }
  227. }
  228. if (type_ != SD_CARD_TYPE_SDHC) {
  229. firstBlock <<= 9;
  230. lastBlock <<= 9;
  231. }
  232. if (cardCommand(CMD32, firstBlock)
  233. || cardCommand(CMD33, lastBlock)
  234. || cardCommand(CMD38, 0)) {
  235. error(SD_CARD_ERROR_ERASE);
  236. goto fail;
  237. }
  238. if (!waitNotBusy(SD_ERASE_TIMEOUT)) {
  239. error(SD_CARD_ERROR_ERASE_TIMEOUT);
  240. goto fail;
  241. }
  242. chipSelectHigh();
  243. return true;
  244. fail:
  245. chipSelectHigh();
  246. return false;
  247. }
  248. //------------------------------------------------------------------------------
  249. /** Determine if card supports single block erase.
  250. *
  251. * \return The value one, true, is returned if single block erase is supported.
  252. * The value zero, false, is returned if single block erase is not supported.
  253. */
  254. bool Sd2Card::eraseSingleBlockEnable() {
  255. csd_t csd;
  256. return readCSD(&csd) ? csd.v1.erase_blk_en : false;
  257. }
  258. //------------------------------------------------------------------------------
  259. /**
  260. * Initialize an SD flash memory card.
  261. *
  262. * \param[in] sckRateID SPI clock rate selector. See setSckRate().
  263. * \param[in] chipSelectPin SD chip select pin number.
  264. *
  265. * \return The value one, true, is returned for success and
  266. * the value zero, false, is returned for failure. The reason for failure
  267. * can be determined by calling errorCode() and errorData().
  268. */
  269. bool Sd2Card::init(uint8_t sckRateID, uint8_t chipSelectPin) {
  270. errorCode_ = type_ = 0;
  271. chipSelectPin_ = chipSelectPin;
  272. // 16-bit init start time allows over a minute
  273. uint16_t t0 = (uint16_t)millis();
  274. uint32_t arg;
  275. // set pin modes
  276. pinMode(chipSelectPin_, OUTPUT);
  277. chipSelectHigh();
  278. pinMode(SPI_MISO_PIN, INPUT);
  279. pinMode(SPI_MOSI_PIN, OUTPUT);
  280. pinMode(SPI_SCK_PIN, OUTPUT);
  281. #if DISABLED(SOFTWARE_SPI)
  282. // SS must be in output mode even it is not chip select
  283. pinMode(SS_PIN, OUTPUT);
  284. // set SS high - may be chip select for another SPI device
  285. #if SET_SPI_SS_HIGH
  286. digitalWrite(SS_PIN, HIGH);
  287. #endif // SET_SPI_SS_HIGH
  288. // set SCK rate for initialization commands
  289. spiRate_ = SPI_SD_INIT_RATE;
  290. spiInit(spiRate_);
  291. #endif // SOFTWARE_SPI
  292. // must supply min of 74 clock cycles with CS high.
  293. for (uint8_t i = 0; i < 10; i++) spiSend(0XFF);
  294. // command to go idle in SPI mode
  295. while ((status_ = cardCommand(CMD0, 0)) != R1_IDLE_STATE) {
  296. if (((uint16_t)millis() - t0) > SD_INIT_TIMEOUT) {
  297. error(SD_CARD_ERROR_CMD0);
  298. goto fail;
  299. }
  300. }
  301. // check SD version
  302. if ((cardCommand(CMD8, 0x1AA) & R1_ILLEGAL_COMMAND)) {
  303. type(SD_CARD_TYPE_SD1);
  304. }
  305. else {
  306. // only need last byte of r7 response
  307. for (uint8_t i = 0; i < 4; i++) status_ = spiRec();
  308. if (status_ != 0XAA) {
  309. error(SD_CARD_ERROR_CMD8);
  310. goto fail;
  311. }
  312. type(SD_CARD_TYPE_SD2);
  313. }
  314. // initialize card and send host supports SDHC if SD2
  315. arg = type() == SD_CARD_TYPE_SD2 ? 0X40000000 : 0;
  316. while ((status_ = cardAcmd(ACMD41, arg)) != R1_READY_STATE) {
  317. // check for timeout
  318. if (((uint16_t)millis() - t0) > SD_INIT_TIMEOUT) {
  319. error(SD_CARD_ERROR_ACMD41);
  320. goto fail;
  321. }
  322. }
  323. // if SD2 read OCR register to check for SDHC card
  324. if (type() == SD_CARD_TYPE_SD2) {
  325. if (cardCommand(CMD58, 0)) {
  326. error(SD_CARD_ERROR_CMD58);
  327. goto fail;
  328. }
  329. if ((spiRec() & 0XC0) == 0XC0) type(SD_CARD_TYPE_SDHC);
  330. // discard rest of ocr - contains allowed voltage range
  331. for (uint8_t i = 0; i < 3; i++) spiRec();
  332. }
  333. chipSelectHigh();
  334. #if DISABLED(SOFTWARE_SPI)
  335. return setSckRate(sckRateID);
  336. #else // SOFTWARE_SPI
  337. return true;
  338. #endif // SOFTWARE_SPI
  339. fail:
  340. chipSelectHigh();
  341. return false;
  342. }
  343. //------------------------------------------------------------------------------
  344. /**
  345. * Read a 512 byte block from an SD card.
  346. *
  347. * \param[in] blockNumber Logical block to be read.
  348. * \param[out] dst Pointer to the location that will receive the data.
  349. * \return The value one, true, is returned for success and
  350. * the value zero, false, is returned for failure.
  351. */
  352. bool Sd2Card::readBlock(uint32_t blockNumber, uint8_t* dst) {
  353. #if ENABLED(SD_CHECK_AND_RETRY)
  354. uint8_t retryCnt = 3;
  355. // use address if not SDHC card
  356. if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
  357. retry2:
  358. retryCnt --;
  359. if (cardCommand(CMD17, blockNumber)) {
  360. error(SD_CARD_ERROR_CMD17);
  361. if (retryCnt > 0) goto retry;
  362. goto fail;
  363. }
  364. if (!readData(dst, 512)) {
  365. if (retryCnt > 0) goto retry;
  366. goto fail;
  367. }
  368. return true;
  369. retry:
  370. chipSelectHigh();
  371. cardCommand(CMD12, 0);//Try sending a stop command, but ignore the result.
  372. errorCode_ = 0;
  373. goto retry2;
  374. #else
  375. // use address if not SDHC card
  376. if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
  377. if (cardCommand(CMD17, blockNumber)) {
  378. error(SD_CARD_ERROR_CMD17);
  379. goto fail;
  380. }
  381. return readData(dst, 512);
  382. #endif
  383. fail:
  384. chipSelectHigh();
  385. return false;
  386. }
  387. //------------------------------------------------------------------------------
  388. /** Read one data block in a multiple block read sequence
  389. *
  390. * \param[in] dst Pointer to the location for the data to be read.
  391. *
  392. * \return The value one, true, is returned for success and
  393. * the value zero, false, is returned for failure.
  394. */
  395. bool Sd2Card::readData(uint8_t* dst) {
  396. chipSelectLow();
  397. return readData(dst, 512);
  398. }
  399. #if ENABLED(SD_CHECK_AND_RETRY)
  400. static const uint16_t crctab[] PROGMEM = {
  401. 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
  402. 0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
  403. 0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
  404. 0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
  405. 0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
  406. 0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
  407. 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
  408. 0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
  409. 0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
  410. 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
  411. 0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
  412. 0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
  413. 0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
  414. 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
  415. 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
  416. 0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
  417. 0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
  418. 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
  419. 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
  420. 0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
  421. 0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
  422. 0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
  423. 0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
  424. 0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
  425. 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
  426. 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
  427. 0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
  428. 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
  429. 0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
  430. 0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
  431. 0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
  432. 0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
  433. };
  434. static uint16_t CRC_CCITT(const uint8_t* data, size_t n) {
  435. uint16_t crc = 0;
  436. for (size_t i = 0; i < n; i++) {
  437. crc = pgm_read_word(&crctab[(crc >> 8 ^ data[i]) & 0XFF]) ^ (crc << 8);
  438. }
  439. return crc;
  440. }
  441. #endif
  442. //------------------------------------------------------------------------------
  443. bool Sd2Card::readData(uint8_t* dst, uint16_t count) {
  444. // wait for start block token
  445. uint16_t t0 = millis();
  446. while ((status_ = spiRec()) == 0XFF) {
  447. if (((uint16_t)millis() - t0) > SD_READ_TIMEOUT) {
  448. error(SD_CARD_ERROR_READ_TIMEOUT);
  449. goto fail;
  450. }
  451. }
  452. if (status_ != DATA_START_BLOCK) {
  453. error(SD_CARD_ERROR_READ);
  454. goto fail;
  455. }
  456. // transfer data
  457. spiRead(dst, count);
  458. #if ENABLED(SD_CHECK_AND_RETRY)
  459. {
  460. uint16_t calcCrc = CRC_CCITT(dst, count);
  461. uint16_t recvCrc = spiRec() << 8;
  462. recvCrc |= spiRec();
  463. if (calcCrc != recvCrc) {
  464. error(SD_CARD_ERROR_CRC);
  465. goto fail;
  466. }
  467. }
  468. #else
  469. // discard CRC
  470. spiRec();
  471. spiRec();
  472. #endif
  473. chipSelectHigh();
  474. return true;
  475. fail:
  476. chipSelectHigh();
  477. return false;
  478. }
  479. //------------------------------------------------------------------------------
  480. /** read CID or CSR register */
  481. bool Sd2Card::readRegister(uint8_t cmd, void* buf) {
  482. uint8_t* dst = reinterpret_cast<uint8_t*>(buf);
  483. if (cardCommand(cmd, 0)) {
  484. error(SD_CARD_ERROR_READ_REG);
  485. goto fail;
  486. }
  487. return readData(dst, 16);
  488. fail:
  489. chipSelectHigh();
  490. return false;
  491. }
  492. //------------------------------------------------------------------------------
  493. /** Start a read multiple blocks sequence.
  494. *
  495. * \param[in] blockNumber Address of first block in sequence.
  496. *
  497. * \note This function is used with readData() and readStop() for optimized
  498. * multiple block reads. SPI chipSelect must be low for the entire sequence.
  499. *
  500. * \return The value one, true, is returned for success and
  501. * the value zero, false, is returned for failure.
  502. */
  503. bool Sd2Card::readStart(uint32_t blockNumber) {
  504. if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
  505. if (cardCommand(CMD18, blockNumber)) {
  506. error(SD_CARD_ERROR_CMD18);
  507. goto fail;
  508. }
  509. chipSelectHigh();
  510. return true;
  511. fail:
  512. chipSelectHigh();
  513. return false;
  514. }
  515. //------------------------------------------------------------------------------
  516. /** End a read multiple blocks sequence.
  517. *
  518. * \return The value one, true, is returned for success and
  519. * the value zero, false, is returned for failure.
  520. */
  521. bool Sd2Card::readStop() {
  522. chipSelectLow();
  523. if (cardCommand(CMD12, 0)) {
  524. error(SD_CARD_ERROR_CMD12);
  525. goto fail;
  526. }
  527. chipSelectHigh();
  528. return true;
  529. fail:
  530. chipSelectHigh();
  531. return false;
  532. }
  533. //------------------------------------------------------------------------------
  534. /**
  535. * Set the SPI clock rate.
  536. *
  537. * \param[in] sckRateID A value in the range [0, 6].
  538. *
  539. * The SPI clock will be set to F_CPU/pow(2, 1 + sckRateID). The maximum
  540. * SPI rate is F_CPU/2 for \a sckRateID = 0 and the minimum rate is F_CPU/128
  541. * for \a scsRateID = 6.
  542. *
  543. * \return The value one, true, is returned for success and the value zero,
  544. * false, is returned for an invalid value of \a sckRateID.
  545. */
  546. bool Sd2Card::setSckRate(uint8_t sckRateID) {
  547. if (sckRateID > 6) {
  548. error(SD_CARD_ERROR_SCK_RATE);
  549. return false;
  550. }
  551. spiRate_ = sckRateID;
  552. return true;
  553. }
  554. //------------------------------------------------------------------------------
  555. // wait for card to go not busy
  556. bool Sd2Card::waitNotBusy(uint16_t timeoutMillis) {
  557. uint16_t t0 = millis();
  558. while (spiRec() != 0XFF) {
  559. if (((uint16_t)millis() - t0) >= timeoutMillis) goto fail;
  560. }
  561. return true;
  562. fail:
  563. return false;
  564. }
  565. //------------------------------------------------------------------------------
  566. /**
  567. * Writes a 512 byte block to an SD card.
  568. *
  569. * \param[in] blockNumber Logical block to be written.
  570. * \param[in] src Pointer to the location of the data to be written.
  571. * \return The value one, true, is returned for success and
  572. * the value zero, false, is returned for failure.
  573. */
  574. bool Sd2Card::writeBlock(uint32_t blockNumber, const uint8_t* src) {
  575. // use address if not SDHC card
  576. if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
  577. if (cardCommand(CMD24, blockNumber)) {
  578. error(SD_CARD_ERROR_CMD24);
  579. goto fail;
  580. }
  581. if (!writeData(DATA_START_BLOCK, src)) goto fail;
  582. // wait for flash programming to complete
  583. if (!waitNotBusy(SD_WRITE_TIMEOUT)) {
  584. error(SD_CARD_ERROR_WRITE_TIMEOUT);
  585. goto fail;
  586. }
  587. // response is r2 so get and check two bytes for nonzero
  588. if (cardCommand(CMD13, 0) || spiRec()) {
  589. error(SD_CARD_ERROR_WRITE_PROGRAMMING);
  590. goto fail;
  591. }
  592. chipSelectHigh();
  593. return true;
  594. fail:
  595. chipSelectHigh();
  596. return false;
  597. }
  598. //------------------------------------------------------------------------------
  599. /** Write one data block in a multiple block write sequence
  600. * \param[in] src Pointer to the location of the data to be written.
  601. * \return The value one, true, is returned for success and
  602. * the value zero, false, is returned for failure.
  603. */
  604. bool Sd2Card::writeData(const uint8_t* src) {
  605. chipSelectLow();
  606. // wait for previous write to finish
  607. if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
  608. if (!writeData(WRITE_MULTIPLE_TOKEN, src)) goto fail;
  609. chipSelectHigh();
  610. return true;
  611. fail:
  612. error(SD_CARD_ERROR_WRITE_MULTIPLE);
  613. chipSelectHigh();
  614. return false;
  615. }
  616. //------------------------------------------------------------------------------
  617. // send one block of data for write block or write multiple blocks
  618. bool Sd2Card::writeData(uint8_t token, const uint8_t* src) {
  619. spiSendBlock(token, src);
  620. spiSend(0xff); // dummy crc
  621. spiSend(0xff); // dummy crc
  622. status_ = spiRec();
  623. if ((status_ & DATA_RES_MASK) != DATA_RES_ACCEPTED) {
  624. error(SD_CARD_ERROR_WRITE);
  625. goto fail;
  626. }
  627. return true;
  628. fail:
  629. chipSelectHigh();
  630. return false;
  631. }
  632. //------------------------------------------------------------------------------
  633. /** Start a write multiple blocks sequence.
  634. *
  635. * \param[in] blockNumber Address of first block in sequence.
  636. * \param[in] eraseCount The number of blocks to be pre-erased.
  637. *
  638. * \note This function is used with writeData() and writeStop()
  639. * for optimized multiple block writes.
  640. *
  641. * \return The value one, true, is returned for success and
  642. * the value zero, false, is returned for failure.
  643. */
  644. bool Sd2Card::writeStart(uint32_t blockNumber, uint32_t eraseCount) {
  645. // send pre-erase count
  646. if (cardAcmd(ACMD23, eraseCount)) {
  647. error(SD_CARD_ERROR_ACMD23);
  648. goto fail;
  649. }
  650. // use address if not SDHC card
  651. if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
  652. if (cardCommand(CMD25, blockNumber)) {
  653. error(SD_CARD_ERROR_CMD25);
  654. goto fail;
  655. }
  656. chipSelectHigh();
  657. return true;
  658. fail:
  659. chipSelectHigh();
  660. return false;
  661. }
  662. //------------------------------------------------------------------------------
  663. /** End a write multiple blocks sequence.
  664. *
  665. * \return The value one, true, is returned for success and
  666. * the value zero, false, is returned for failure.
  667. */
  668. bool Sd2Card::writeStop() {
  669. chipSelectLow();
  670. if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
  671. spiSend(STOP_TRAN_TOKEN);
  672. if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
  673. chipSelectHigh();
  674. return true;
  675. fail:
  676. error(SD_CARD_ERROR_STOP_TRAN);
  677. chipSelectHigh();
  678. return false;
  679. }
  680. #endif