Sd2Card.cpp 19 KB

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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. #ifdef SDSUPPORT
  22. #include "Sd2Card.h"
  23. //------------------------------------------------------------------------------
  24. #ifndef 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 = (1 << SPE) | (1 << MSTR) | (spiRate >> 1);
  38. SPSR = spiRate & 1 || spiRate == 6 ? 0 : 1 << SPI2X;
  39. }
  40. //------------------------------------------------------------------------------
  41. /** SPI receive a byte */
  42. static uint8_t spiRec() {
  43. SPDR = 0XFF;
  44. while (!(SPSR & (1 << SPIF)));
  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 (!(SPSR & (1 << SPIF)));
  55. buf[i] = SPDR;
  56. SPDR = 0XFF;
  57. }
  58. while (!(SPSR & (1 << SPIF)));
  59. buf[nbyte] = SPDR;
  60. }
  61. //------------------------------------------------------------------------------
  62. /** SPI send a byte */
  63. static void spiSend(uint8_t b) {
  64. SPDR = b;
  65. while (!(SPSR & (1 << SPIF)));
  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 (!(SPSR & (1 << SPIF)));
  74. SPDR = buf[i];
  75. while (!(SPSR & (1 << SPIF)));
  76. SPDR = buf[i + 1];
  77. }
  78. while (!(SPSR & (1 << SPIF)));
  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. //------------------------------------------------------------------------------
  114. /** Soft SPI send byte */
  115. static void spiSend(uint8_t data) {
  116. // no interrupts during byte send - about 8 us
  117. cli();
  118. for (uint8_t i = 0; i < 8; i++) {
  119. fastDigitalWrite(SPI_SCK_PIN, LOW);
  120. fastDigitalWrite(SPI_MOSI_PIN, data & 0X80);
  121. data <<= 1;
  122. fastDigitalWrite(SPI_SCK_PIN, HIGH);
  123. }
  124. // hold SCK high for a few ns
  125. nop;
  126. nop;
  127. nop;
  128. nop;
  129. fastDigitalWrite(SPI_SCK_PIN, LOW);
  130. // enable interrupts
  131. sei();
  132. }
  133. //------------------------------------------------------------------------------
  134. /** Soft SPI send block */
  135. void spiSendBlock(uint8_t token, const uint8_t* buf) {
  136. spiSend(token);
  137. for (uint16_t i = 0; i < 512; i++) {
  138. spiSend(buf[i]);
  139. }
  140. }
  141. #endif // SOFTWARE_SPI
  142. //------------------------------------------------------------------------------
  143. // send command and return error code. Return zero for OK
  144. uint8_t Sd2Card::cardCommand(uint8_t cmd, uint32_t arg) {
  145. // select card
  146. chipSelectLow();
  147. // wait up to 300 ms if busy
  148. waitNotBusy(300);
  149. // send command
  150. spiSend(cmd | 0x40);
  151. // send argument
  152. for (int8_t s = 24; s >= 0; s -= 8) spiSend(arg >> s);
  153. // send CRC
  154. uint8_t crc = 0XFF;
  155. if (cmd == CMD0) crc = 0X95; // correct crc for CMD0 with arg 0
  156. if (cmd == CMD8) crc = 0X87; // correct crc for CMD8 with arg 0X1AA
  157. spiSend(crc);
  158. // skip stuff byte for stop read
  159. if (cmd == CMD12) spiRec();
  160. // wait for response
  161. for (uint8_t i = 0; ((status_ = spiRec()) & 0X80) && i != 0XFF; i++);
  162. return status_;
  163. }
  164. //------------------------------------------------------------------------------
  165. /**
  166. * Determine the size of an SD flash memory card.
  167. *
  168. * \return The number of 512 byte data blocks in the card
  169. * or zero if an error occurs.
  170. */
  171. uint32_t Sd2Card::cardSize() {
  172. csd_t csd;
  173. if (!readCSD(&csd)) return 0;
  174. if (csd.v1.csd_ver == 0) {
  175. uint8_t read_bl_len = csd.v1.read_bl_len;
  176. uint16_t c_size = (csd.v1.c_size_high << 10)
  177. | (csd.v1.c_size_mid << 2) | csd.v1.c_size_low;
  178. uint8_t c_size_mult = (csd.v1.c_size_mult_high << 1)
  179. | csd.v1.c_size_mult_low;
  180. return (uint32_t)(c_size + 1) << (c_size_mult + read_bl_len - 7);
  181. } else if (csd.v2.csd_ver == 1) {
  182. uint32_t c_size = ((uint32_t)csd.v2.c_size_high << 16)
  183. | (csd.v2.c_size_mid << 8) | csd.v2.c_size_low;
  184. return (c_size + 1) << 10;
  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. #ifndef 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. #ifndef 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. } else {
  305. // only need last byte of r7 response
  306. for (uint8_t i = 0; i < 4; i++) status_ = spiRec();
  307. if (status_ != 0XAA) {
  308. error(SD_CARD_ERROR_CMD8);
  309. goto fail;
  310. }
  311. type(SD_CARD_TYPE_SD2);
  312. }
  313. // initialize card and send host supports SDHC if SD2
  314. arg = type() == SD_CARD_TYPE_SD2 ? 0X40000000 : 0;
  315. while ((status_ = cardAcmd(ACMD41, arg)) != R1_READY_STATE) {
  316. // check for timeout
  317. if (((uint16_t)millis() - t0) > SD_INIT_TIMEOUT) {
  318. error(SD_CARD_ERROR_ACMD41);
  319. goto fail;
  320. }
  321. }
  322. // if SD2 read OCR register to check for SDHC card
  323. if (type() == SD_CARD_TYPE_SD2) {
  324. if (cardCommand(CMD58, 0)) {
  325. error(SD_CARD_ERROR_CMD58);
  326. goto fail;
  327. }
  328. if ((spiRec() & 0XC0) == 0XC0) type(SD_CARD_TYPE_SDHC);
  329. // discard rest of ocr - contains allowed voltage range
  330. for (uint8_t i = 0; i < 3; i++) spiRec();
  331. }
  332. chipSelectHigh();
  333. #ifndef SOFTWARE_SPI
  334. return setSckRate(sckRateID);
  335. #else // SOFTWARE_SPI
  336. return true;
  337. #endif // SOFTWARE_SPI
  338. fail:
  339. chipSelectHigh();
  340. return false;
  341. }
  342. //------------------------------------------------------------------------------
  343. /**
  344. * Read a 512 byte block from an SD card.
  345. *
  346. * \param[in] blockNumber Logical block to be read.
  347. * \param[out] dst Pointer to the location that will receive the data.
  348. * \return The value one, true, is returned for success and
  349. * the value zero, false, is returned for failure.
  350. */
  351. bool Sd2Card::readBlock(uint32_t blockNumber, uint8_t* dst) {
  352. // use address if not SDHC card
  353. if (type()!= SD_CARD_TYPE_SDHC) blockNumber <<= 9;
  354. if (cardCommand(CMD17, blockNumber)) {
  355. error(SD_CARD_ERROR_CMD17);
  356. goto fail;
  357. }
  358. return readData(dst, 512);
  359. fail:
  360. chipSelectHigh();
  361. return false;
  362. }
  363. //------------------------------------------------------------------------------
  364. /** Read one data block in a multiple block read sequence
  365. *
  366. * \param[in] dst Pointer to the location for the data to be read.
  367. *
  368. * \return The value one, true, is returned for success and
  369. * the value zero, false, is returned for failure.
  370. */
  371. bool Sd2Card::readData(uint8_t *dst) {
  372. chipSelectLow();
  373. return readData(dst, 512);
  374. }
  375. //------------------------------------------------------------------------------
  376. bool Sd2Card::readData(uint8_t* dst, uint16_t count) {
  377. // wait for start block token
  378. uint16_t t0 = millis();
  379. while ((status_ = spiRec()) == 0XFF) {
  380. if (((uint16_t)millis() - t0) > SD_READ_TIMEOUT) {
  381. error(SD_CARD_ERROR_READ_TIMEOUT);
  382. goto fail;
  383. }
  384. }
  385. if (status_ != DATA_START_BLOCK) {
  386. error(SD_CARD_ERROR_READ);
  387. goto fail;
  388. }
  389. // transfer data
  390. spiRead(dst, count);
  391. // discard CRC
  392. spiRec();
  393. spiRec();
  394. chipSelectHigh();
  395. return true;
  396. fail:
  397. chipSelectHigh();
  398. return false;
  399. }
  400. //------------------------------------------------------------------------------
  401. /** read CID or CSR register */
  402. bool Sd2Card::readRegister(uint8_t cmd, void* buf) {
  403. uint8_t* dst = reinterpret_cast<uint8_t*>(buf);
  404. if (cardCommand(cmd, 0)) {
  405. error(SD_CARD_ERROR_READ_REG);
  406. goto fail;
  407. }
  408. return readData(dst, 16);
  409. fail:
  410. chipSelectHigh();
  411. return false;
  412. }
  413. //------------------------------------------------------------------------------
  414. /** Start a read multiple blocks sequence.
  415. *
  416. * \param[in] blockNumber Address of first block in sequence.
  417. *
  418. * \note This function is used with readData() and readStop() for optimized
  419. * multiple block reads. SPI chipSelect must be low for the entire sequence.
  420. *
  421. * \return The value one, true, is returned for success and
  422. * the value zero, false, is returned for failure.
  423. */
  424. bool Sd2Card::readStart(uint32_t blockNumber) {
  425. if (type()!= SD_CARD_TYPE_SDHC) blockNumber <<= 9;
  426. if (cardCommand(CMD18, blockNumber)) {
  427. error(SD_CARD_ERROR_CMD18);
  428. goto fail;
  429. }
  430. chipSelectHigh();
  431. return true;
  432. fail:
  433. chipSelectHigh();
  434. return false;
  435. }
  436. //------------------------------------------------------------------------------
  437. /** End a read multiple blocks sequence.
  438. *
  439. * \return The value one, true, is returned for success and
  440. * the value zero, false, is returned for failure.
  441. */
  442. bool Sd2Card::readStop() {
  443. chipSelectLow();
  444. if (cardCommand(CMD12, 0)) {
  445. error(SD_CARD_ERROR_CMD12);
  446. goto fail;
  447. }
  448. chipSelectHigh();
  449. return true;
  450. fail:
  451. chipSelectHigh();
  452. return false;
  453. }
  454. //------------------------------------------------------------------------------
  455. /**
  456. * Set the SPI clock rate.
  457. *
  458. * \param[in] sckRateID A value in the range [0, 6].
  459. *
  460. * The SPI clock will be set to F_CPU/pow(2, 1 + sckRateID). The maximum
  461. * SPI rate is F_CPU/2 for \a sckRateID = 0 and the minimum rate is F_CPU/128
  462. * for \a scsRateID = 6.
  463. *
  464. * \return The value one, true, is returned for success and the value zero,
  465. * false, is returned for an invalid value of \a sckRateID.
  466. */
  467. bool Sd2Card::setSckRate(uint8_t sckRateID) {
  468. if (sckRateID > 6) {
  469. error(SD_CARD_ERROR_SCK_RATE);
  470. return false;
  471. }
  472. spiRate_ = sckRateID;
  473. return true;
  474. }
  475. //------------------------------------------------------------------------------
  476. // wait for card to go not busy
  477. bool Sd2Card::waitNotBusy(uint16_t timeoutMillis) {
  478. uint16_t t0 = millis();
  479. while (spiRec() != 0XFF) {
  480. if (((uint16_t)millis() - t0) >= timeoutMillis) goto fail;
  481. }
  482. return true;
  483. fail:
  484. return false;
  485. }
  486. //------------------------------------------------------------------------------
  487. /**
  488. * Writes a 512 byte block to an SD card.
  489. *
  490. * \param[in] blockNumber Logical block to be written.
  491. * \param[in] src Pointer to the location of the data to be written.
  492. * \return The value one, true, is returned for success and
  493. * the value zero, false, is returned for failure.
  494. */
  495. bool Sd2Card::writeBlock(uint32_t blockNumber, const uint8_t* src) {
  496. // use address if not SDHC card
  497. if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
  498. if (cardCommand(CMD24, blockNumber)) {
  499. error(SD_CARD_ERROR_CMD24);
  500. goto fail;
  501. }
  502. if (!writeData(DATA_START_BLOCK, src)) goto fail;
  503. // wait for flash programming to complete
  504. if (!waitNotBusy(SD_WRITE_TIMEOUT)) {
  505. error(SD_CARD_ERROR_WRITE_TIMEOUT);
  506. goto fail;
  507. }
  508. // response is r2 so get and check two bytes for nonzero
  509. if (cardCommand(CMD13, 0) || spiRec()) {
  510. error(SD_CARD_ERROR_WRITE_PROGRAMMING);
  511. goto fail;
  512. }
  513. chipSelectHigh();
  514. return true;
  515. fail:
  516. chipSelectHigh();
  517. return false;
  518. }
  519. //------------------------------------------------------------------------------
  520. /** Write one data block in a multiple block write sequence
  521. * \param[in] src Pointer to the location of the data to be written.
  522. * \return The value one, true, is returned for success and
  523. * the value zero, false, is returned for failure.
  524. */
  525. bool Sd2Card::writeData(const uint8_t* src) {
  526. chipSelectLow();
  527. // wait for previous write to finish
  528. if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
  529. if (!writeData(WRITE_MULTIPLE_TOKEN, src)) goto fail;
  530. chipSelectHigh();
  531. return true;
  532. fail:
  533. error(SD_CARD_ERROR_WRITE_MULTIPLE);
  534. chipSelectHigh();
  535. return false;
  536. }
  537. //------------------------------------------------------------------------------
  538. // send one block of data for write block or write multiple blocks
  539. bool Sd2Card::writeData(uint8_t token, const uint8_t* src) {
  540. spiSendBlock(token, src);
  541. spiSend(0xff); // dummy crc
  542. spiSend(0xff); // dummy crc
  543. status_ = spiRec();
  544. if ((status_ & DATA_RES_MASK) != DATA_RES_ACCEPTED) {
  545. error(SD_CARD_ERROR_WRITE);
  546. goto fail;
  547. }
  548. return true;
  549. fail:
  550. chipSelectHigh();
  551. return false;
  552. }
  553. //------------------------------------------------------------------------------
  554. /** Start a write multiple blocks sequence.
  555. *
  556. * \param[in] blockNumber Address of first block in sequence.
  557. * \param[in] eraseCount The number of blocks to be pre-erased.
  558. *
  559. * \note This function is used with writeData() and writeStop()
  560. * for optimized multiple block writes.
  561. *
  562. * \return The value one, true, is returned for success and
  563. * the value zero, false, is returned for failure.
  564. */
  565. bool Sd2Card::writeStart(uint32_t blockNumber, uint32_t eraseCount) {
  566. // send pre-erase count
  567. if (cardAcmd(ACMD23, eraseCount)) {
  568. error(SD_CARD_ERROR_ACMD23);
  569. goto fail;
  570. }
  571. // use address if not SDHC card
  572. if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
  573. if (cardCommand(CMD25, blockNumber)) {
  574. error(SD_CARD_ERROR_CMD25);
  575. goto fail;
  576. }
  577. chipSelectHigh();
  578. return true;
  579. fail:
  580. chipSelectHigh();
  581. return false;
  582. }
  583. //------------------------------------------------------------------------------
  584. /** End a write multiple blocks sequence.
  585. *
  586. * \return The value one, true, is returned for success and
  587. * the value zero, false, is returned for failure.
  588. */
  589. bool Sd2Card::writeStop() {
  590. chipSelectLow();
  591. if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
  592. spiSend(STOP_TRAN_TOKEN);
  593. if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
  594. chipSelectHigh();
  595. return true;
  596. fail:
  597. error(SD_CARD_ERROR_STOP_TRAN);
  598. chipSelectHigh();
  599. return false;
  600. }
  601. #endif