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/OpenSprinkler Controller/software/arduino-code/libraries/OpenSprinklerGen2/tinyFAT.cpp

https://github.com/sherckuith/opensprinkler
C++ | 952 lines | 829 code | 91 blank | 32 comment | 144 complexity | dbc9e4409990cca8658b9b148807eea0 MD5 | raw file
Possible License(s): GPL-2.0 
    

  1. /*

    2. 

  2. 	tinyFAT.cpp - Arduino library support FAT16 on SD cards

    3. 

  3. 	Copyright (C)2010-2011 Henning Karlsen. All right reserved

    4. 

  4. 

    5. 

  5. 	You can find the latest version of the library at 

    6. 

  6. 	http://www.henningkarlsen.com/electronics

    7. 

  7. 

    8. 

  8. 	This library has been made to easily use SD card with the Arduino.

    9. 

  9. 

    10. 

  10. 	If you make any modifications or improvements to the code, I would appreciate

    11. 

  11. 	that you share the code with me so that I might include it in the next release.

    12. 

  12. 	I can be contacted through http://www.henningkarlsen.com/electronics/contact.php

    13. 

  13. 

    14. 

  14. 	This library is free software; you can redistribute it and/or

    15. 

  15. 	modify it under the terms of the GNU Lesser General Public

    16. 

  16. 	License as published by the Free Software Foundation; either

    17. 

  17. 	version 2.1 of the License, or (at your option) any later version.

    18. 

  18. 

    19. 

  19. 	This library is distributed in the hope that it will be useful,

    20. 

  20. 	but WITHOUT ANY WARRANTY; without even the implied warranty of

    21. 

  21. 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    22. 

  22. 	Lesser General Public License for more details.

    23. 

  23. 

    24. 

  24. 	You should have received a copy of the GNU Lesser General Public

    25. 

  25. 	License along with this library; if not, write to the Free Software

    26. 

  26. 	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    27. 

  27. */

    28. 

  28. #include "tinyFAT.h"

    29. 

  29. #include <mmc.h>

    30. 

  30. 

    31. 

  31. /* Public */

    32. 

  32. 

    33. 

  33. tinyFAT::tinyFAT()

    34. 

  34. {

    35. 

  35. 	_inited=false;

    36. 

  36. }

    37. 

  37. 

    38. 

  38. byte tinyFAT::initFAT(byte speed)

    39. 

  39. {

    40. 

  40. 	mmc::initialize(speed);

    41. 

  41. // Read MBR

    42. 

  42. 	if (RES_OK == mmc::readSector(buffer, 0))

    43. 

  43. 	{

    44. 

  44. 		if ((buffer[0x01FE]==0x55) && (buffer[0x01FF]==0xAA))

    45. 

  45. 		{

    46. 

  46. 			MBR.part1Type=buffer[450];

    47. 

  47. 			MBR.part1Start = uint16_t(buffer[454])+(uint16_t(buffer[455])<<8)+(uint32_t(buffer[456])<<16)+(uint32_t(buffer[457])<<24);

    48. 

  48. 			MBR.part1Size = uint16_t(buffer[458])+(uint16_t(buffer[459])<<8)+(uint32_t(buffer[460])<<16)+(uint32_t(buffer[461])<<24);

    49. 

  49. 		}

    50. 

  50. 		else

    51. 

  51. 		{

    52. 

  52. 			return ERROR_MBR_SIGNATURE;

    53. 

  53. 		}

    54. 

  54. 	}

    55. 

  55. 	else

    56. 

  56. 		return ERROR_MBR_READ_ERROR;

    57. 

  57. 

    58. 

  58. 	if ((MBR.part1Type!=0x04) && (MBR.part1Type!=0x06) && (MBR.part1Type!=0x86))

    59. 

  59. 	{

    60. 

  60. 		return ERROR_MBR_INVALID_FS;

    61. 

  61. 	}

    62. 

  62. 

    63. 

  63. // Read Boot Sector

    64. 

  64. 	if (RES_OK == mmc::readSector(buffer, MBR.part1Start))

    65. 

  65.     {

    66. 

  66. 		if ((buffer[0x01FE]==0x55) && (buffer[0x01FF]==0xAA))

    67. 

  67. 		{

    68. 

  68. 			BS.sectorsPerCluster = buffer[0x0D];

    69. 

  69. 			BS.reservedSectors = uint16_t(buffer[0x0E])+(uint16_t(buffer[0x0F])<<8);

    70. 

  70. 			BS.fatCopies = buffer[0x10];

    71. 

  71. 			BS.rootDirectoryEntries = uint16_t(buffer[0x11])+(uint16_t(buffer[0x12])<<8);

    72. 

  72. 			BS.totalFilesystemSectors = uint16_t(buffer[0x13])+(uint16_t(buffer[0x14])<<8);

    73. 

  73. 			if (BS.totalFilesystemSectors==0)

    74. 

  74. 				BS.totalFilesystemSectors = uint16_t(buffer[0x20])+(uint16_t(buffer[0x21])<<8)+(uint32_t(buffer[0x22])<<16)+(uint32_t(buffer[0x23])<<24);

    75. 

  75. 			BS.sectorsPerFAT = uint16_t(buffer[0x16])+(uint16_t(buffer[0x17])<<8);

    76. 

  76. 			BS.hiddenSectors = uint16_t(buffer[0x1C])+(uint16_t(buffer[0x1D])<<8)+(uint32_t(buffer[0x1E])<<16)+(uint32_t(buffer[0x1F])<<24);

    77. 

  77. 			BS.partitionSerialNum = uint16_t(buffer[0x27])+(uint16_t(buffer[0x28])<<8)+(uint32_t(buffer[0x29])<<16)+(uint32_t(buffer[0x2A])<<24);

    78. 

  78. 			firstDirSector = MBR.part1Start + BS.reservedSectors + (BS.fatCopies * BS.sectorsPerFAT);

    79. 

  79. 			BS.fat1Start = MBR.part1Start + BS.reservedSectors;

    80. 

  80. 			BS.fat2Start = BS.fat1Start + BS.sectorsPerFAT;

    81. 

  81. 			BS.partitionSize = float((MBR.part1Size*512)/float(1048576));

    82. 

  82. 		}

    83. 

  83. 		else

    84. 

  84. 			return ERROR_BOOTSEC_SIGNATURE;

    85. 

  85. 	}

    86. 

  86. 	else

    87. 

  87. 		return ERROR_BOOTSEC_READ_ERROR;

    88. 

  88. 

    89. 

  89. 	_inited=true;

    90. 

  90. 	return 0x00;

    91. 

  91. }

    92. 

  92. 

    93. 

  93. byte tinyFAT::findFirstFile(_directory_entry *tempDE)

    94. 

  94. {

    95. 

  95. 	unsigned long currSec = firstDirSector;

    96. 

  96. 	word offset = 0;

    97. 

  97. 

    98. 

  98. 	DEcnt=0;

    99. 

  99. 	mmc::readSector(buffer, currSec);

    100. 

  100. 

    101. 

  101. 	if (buffer[0]==0x00)

    102. 

  102. 		return ERROR_NO_MORE_FILES;

    103. 

  103. 	else

    104. 

  104. 	{

    105. 

  105. 		while ((buffer[offset + 0x0B] & 0x08) || (buffer[offset + 0x0B] & 0x10) || (buffer[offset]==0xE5))

    106. 

  106. 		{

    107. 

  107. 			offset+=32;

    108. 

  108. 			DEcnt++;

    109. 

  109. 			if (offset==512)

    110. 

  110. 			{

    111. 

  111. 			  currSec++;

    112. 

  112. 			  mmc::readSector(buffer, currSec);

    113. 

  113. 			  offset = 0;

    114. 

  114. 			} 

    115. 

  115. 			if (buffer[offset]==0x00)

    116. 

  116. 				return ERROR_NO_MORE_FILES;

    117. 

  117. 		}

    118. 

  118. 

    119. 

  119. 		for (int i=0; i<8; i++)

    120. 

  120. 		{

    121. 

  121. 			tempDE->filename[i] = buffer[i+offset];

    122. 

  122. 		}

    123. 

  123. 		for (int i=0; i<3; i++)

    124. 

  124. 		{

    125. 

  125. 			tempDE->fileext[i] = buffer[i+0x08+offset];

    126. 

  126. 		}

    127. 

  127. 		tempDE->filename[8] = 0;

    128. 

  128. 		tempDE->fileext[3] = 0;

    129. 

  129. 		tempDE->attributes = buffer[0x0B + offset];

    130. 

  130. 		tempDE->time = uint16_t(buffer[0x0E + offset]) + (uint16_t(buffer[0x0F + offset])<<8);

    131. 

  131. 		tempDE->date = uint16_t(buffer[0x10 + offset]) + (uint16_t(buffer[0x11 + offset])<<8);

    132. 

  132. 		tempDE->startCluster = uint16_t(buffer[0x1A + offset]) + (uint16_t(buffer[0x1B + offset])<<8);

    133. 

  133. 		tempDE->fileSize = uint16_t(buffer[offset + 0x1C]) | (uint16_t(buffer[offset + 0x1D])<<8) | (uint32_t(buffer[offset + 0x1E])<<16) | (uint32_t(buffer[offset + 0x1F])<<24);

    134. 

  134. 		DEcnt++;

    135. 

  135. 

    136. 

  136. 		return NO_ERROR;

    137. 

  137. 	}

    138. 

  138. }

    139. 

  139. 

    140. 

  140. byte tinyFAT::findNextFile(_directory_entry *tempDE)

    141. 

  141. {

    142. 

  142. 	unsigned long currSec = firstDirSector;

    143. 

  143. 	word offset = DEcnt*32;

    144. 

  144. 

    145. 

  145. 	while (offset>=512)

    146. 

  146. 	{

    147. 

  147. 		currSec++;

    148. 

  148. 		offset-=512;

    149. 

  149. 	}

    150. 

  150. 

    151. 

  151. 	mmc::readSector(buffer, currSec);

    152. 

  152. 

    153. 

  153. 	if (buffer[offset]==0x00)

    154. 

  154. 		return ERROR_NO_MORE_FILES;

    155. 

  155. 	else

    156. 

  156. 	{

    157. 

  157. 		while ((buffer[offset + 0x0B] & 0x08) || (buffer[offset + 0x0B] & 0x10) || (buffer[offset]==0xE5))

    158. 

  158. 		{

    159. 

  159. 			offset+=32;

    160. 

  160. 			DEcnt++;

    161. 

  161. 			if (offset==512)

    162. 

  162. 			{

    163. 

  163. 			  currSec++;

    164. 

  164. 			  mmc::readSector(buffer, currSec);

    165. 

  165. 			  offset = 0;

    166. 

  166. 			} 

    167. 

  167. 			if (buffer[offset]==0x00)

    168. 

  168. 				return ERROR_NO_MORE_FILES;

    169. 

  169. 		}

    170. 

  170. 

    171. 

  171. 		for (int i=0; i<8; i++)

    172. 

  172. 		{

    173. 

  173. 			tempDE->filename[i] = buffer[i+offset];

    174. 

  174. 		}

    175. 

  175. 		for (int i=0; i<3; i++)

    176. 

  176. 		{

    177. 

  177. 			tempDE->fileext[i] = buffer[i+0x08+offset];

    178. 

  178. 		}

    179. 

  179. 		tempDE->filename[8] = 0;

    180. 

  180. 		tempDE->fileext[3] = 0;

    181. 

  181. 		tempDE->attributes = buffer[0x0B + offset];

    182. 

  182. 		tempDE->time = uint16_t(buffer[0x0E + offset]) + (uint16_t(buffer[0x0F + offset])<<8);

    183. 

  183. 		tempDE->date = uint16_t(buffer[0x10 + offset]) + (uint16_t(buffer[0x11 + offset])<<8);

    184. 

  184. 		tempDE->startCluster = uint16_t(buffer[0x1A + offset]) + (uint16_t(buffer[0x1B + offset])<<8);

    185. 

  185. 		tempDE->fileSize = uint16_t(buffer[offset + 0x1C]) | (uint16_t(buffer[offset + 0x1D])<<8) | (uint32_t(buffer[offset + 0x1E])<<16) | (uint32_t(buffer[offset + 0x1F])<<24);

    186. 

  186. 		DEcnt++;

    187. 

  187. 

    188. 

  188. 		return NO_ERROR;

    189. 

  189. 	}

    190. 

  190. }

    191. 

  191. 

    192. 

  192. byte tinyFAT::openFile(char *fn, byte mode)

    193. 

  193. {

    194. 

  194. 	_directory_entry tmpDE;

    195. 

  195. 	char tmpFN[13];

    196. 

  196. 	byte res;

    197. 

  197. 	int i, j;

    198. 

  198. 

    199. 

  199. 	if (currFile.filename[0]!=0x00)

    200. 

  200. 		return ERROR_ANOTHER_FILE_OPEN;

    201. 

  201. 

    202. 

  202. 	for (i=0; i<strlen(fn); i++)

    203. 

  203. 		fn[i]=uCase(fn[i]);

    204. 

  204. 

    205. 

  205. 	res=findFirstFile(&tmpDE);

    206. 

  206. 	if (res==ERROR_NO_MORE_FILES)

    207. 

  207. 		return ERROR_FILE_NOT_FOUND;

    208. 

  208. 	else

    209. 

  209. 	{

    210. 

  210. 		i=0;

    211. 

  211. 		j=0;

    212. 

  212. 		while ((tmpDE.filename[i]!=0x20) and (i<8))

    213. 

  213. 		{

    214. 

  214. 			tmpFN[i]=tmpDE.filename[i];

    215. 

  215. 			i++;

    216. 

  216. 		}

    217. 

  217. 		tmpFN[i]='.';

    218. 

  218. 		i++;

    219. 

  219. 		while ((tmpDE.fileext[j]!=0x20) and (j<3))

    220. 

  220. 		{

    221. 

  221. 			tmpFN[i]=tmpDE.fileext[j];

    222. 

  222. 			i++;

    223. 

  223. 			j++;

    224. 

  224. 		}

    225. 

  225. 		tmpFN[i]=0x00;

    226. 

  226. 		if (!strcmp(tmpFN,fn))

    227. 

  227. 		{

    228. 

  228. 			for (i=0; i<13; i++)

    229. 

  229. 				currFile.filename[i]=tmpFN[i];

    230. 

  230. 			currFile.currentCluster=tmpDE.startCluster;

    231. 

  231. 			currFile.fileSize=tmpDE.fileSize;

    232. 

  232. 			currFile.currentPos=0;

    233. 

  233. 			currFile.fileMode=mode;

    234. 

  234. 			return NO_ERROR;

    235. 

  235. 		}

    236. 

  236. 		while (res==NO_ERROR)

    237. 

  237. 		{

    238. 

  238. 			res = file.findNextFile(&tmpDE);

    239. 

  239. 			if (res==NO_ERROR)

    240. 

  240. 			{

    241. 

  241. 				i=0;

    242. 

  242. 				j=0;

    243. 

  243. 				while ((tmpDE.filename[i]!=0x20) and (i<8))

    244. 

  244. 				{

    245. 

  245. 					tmpFN[i]=tmpDE.filename[i];

    246. 

  246. 					i++;

    247. 

  247. 				}

    248. 

  248. 				tmpFN[i]='.';

    249. 

  249. 				i++;

    250. 

  250. 				while ((tmpDE.fileext[j]!=0x20) and (j<3))

    251. 

  251. 				{

    252. 

  252. 					tmpFN[i]=tmpDE.fileext[j];

    253. 

  253. 					i++;

    254. 

  254. 					j++;

    255. 

  255. 				}

    256. 

  256. 				tmpFN[i]=0x00;

    257. 

  257. 				if (!strcmp(tmpFN,fn))

    258. 

  258. 				{

    259. 

  259. 					for (i=0; i<13; i++)

    260. 

  260. 						currFile.filename[i]=tmpFN[i];

    261. 

  261. 					currFile.currentCluster=tmpDE.startCluster;

    262. 

  262. 					currFile.fileSize=tmpDE.fileSize;

    263. 

  263. 					currFile.currentPos=0;

    264. 

  264. 					currFile.fileMode=mode;

    265. 

  265. 					return NO_ERROR;

    266. 

  266. 				}

    267. 

  267. 			}

    268. 

  268. 		}

    269. 

  269. 

    270. 

  270. 

    271. 

  271. 	}

    272. 

  272. 	return ERROR_FILE_NOT_FOUND;

    273. 

  273. }

    274. 

  274. 

    275. 

  275. uint16_t tinyFAT::readBinary()

    276. 

  276. {

    277. 

  277. 	uint32_t sec;

    278. 

  278. 	uint8_t status_;

    279. 

  279. 

    280. 

  280. 	if (currFile.fileMode==FILEMODE_BINARY)

    281. 

  281. 	{

    282. 

  282. 		if ((currFile.currentPos==0) and (currFile.currentCluster==0))

    283. 

  283. 			return FILE_IS_EMPTY;

    284. 

  284. 		if (((currFile.currentPos % BS.sectorsPerCluster)==0) and (currFile.currentPos>0))

    285. 

  285. 			currFile.currentCluster=findNextCluster(currFile.currentCluster);

    286. 

  286. 		sec=BS.hiddenSectors + (uint32_t)BS.reservedSectors + ((uint32_t)BS.fatCopies*(uint32_t)BS.sectorsPerFAT)+(((uint32_t)BS.rootDirectoryEntries*32)/512)+((uint32_t)currFile.currentCluster-2)*(uint32_t)BS.sectorsPerCluster+((uint32_t)currFile.currentPos % (uint32_t)BS.sectorsPerCluster);

    287. 

  287. 		status_=mmc::readSector(buffer, sec);

    288. 

  288. 		if (status_)

    289. 

  289. 		{

    290. 

  290. 			return status_;

    291. 

  291. 		}

    292. 

  292. 		currFile.currentPos++;

    293. 

  293. 		if ((currFile.currentPos*512)>currFile.fileSize)

    294. 

  294. 		{

    295. 

  295. 				return (currFile.fileSize-((currFile.currentPos-1)*512));

    296. 

  296. 		}

    297. 

  297. 		else

    298. 

  298. 		{

    299. 

  299. 				return 512;

    300. 

  300. 		}

    301. 

  301. 	}

    302. 

  302. 	else

    303. 

  303. 		if (currFile.fileMode==0x00)

    304. 

  304. 			return ERROR_NO_FILE_OPEN;

    305. 

  305. 		else

    306. 

  306. 			return ERROR_WRONG_FILEMODE;

    307. 

  307. }

    308. 

  308. 

    309. 

  309. uint16_t tinyFAT::readLn(char *st, int bufSize)

    310. 

  310. {

    311. 

  311. 	uint32_t sec;

    312. 

  312. 	int bufIndex=0;

    313. 

  313. 

    314. 

  314. 	for (int i=0; i<=bufSize; i++)

    315. 

  315. 		st[i]=0;

    316. 

  316. 

    317. 

  317. 	if (currFile.fileMode==FILEMODE_TEXT_READ)

    318. 

  318. 	{

    319. 

  319. 		if ((currFile.currentPos==0) and (currFile.currentCluster==0))

    320. 

  320. 			return FILE_IS_EMPTY;

    321. 

  321. 		sec=((uint32_t)BS.reservedSectors+((uint32_t)BS.fatCopies*(uint32_t)BS.sectorsPerFAT)+(((uint32_t)BS.rootDirectoryEntries*32)/512)+(((uint32_t)currFile.currentCluster-2)*(uint32_t)BS.sectorsPerCluster)+BS.hiddenSectors)+(((uint32_t)currFile.currentPos/512) % (uint32_t)BS.sectorsPerCluster);

    322. 

  322. 		mmc::readSector(buffer, sec);

    323. 

  323. 		while ((currFile.currentPos<currFile.fileSize) and (buffer[currFile.currentPos % 512]!=10) and (buffer[currFile.currentPos % 512]!=13) and (bufIndex<bufSize))

    324. 

  324. 		{

    325. 

  325. 			st[bufIndex]=buffer[currFile.currentPos % 512];

    326. 

  326. 			bufIndex++;

    327. 

  327. 			currFile.currentPos++;

    328. 

  328. 			if ((currFile.currentPos % 512) == 0)

    329. 

  329. 			{

    330. 

  330. 				sec++;

    331. 

  331. 				if (((currFile.currentPos/512) % BS.sectorsPerCluster)==0)

    332. 

  332. 				{

    333. 

  333. 					currFile.currentCluster=findNextCluster(currFile.currentCluster);

    334. 

  334. 					sec=((uint32_t)BS.reservedSectors+((uint32_t)BS.fatCopies*(uint32_t)BS.sectorsPerFAT)+(((uint32_t)BS.rootDirectoryEntries*32)/512)+(((uint32_t)currFile.currentCluster-2)*(uint32_t)BS.sectorsPerCluster)+BS.hiddenSectors);

    335. 

  335. 				}

    336. 

  336. 				mmc::readSector(buffer, sec);

    337. 

  337. 			}

    338. 

  338. 		}

    339. 

  339. 		if (currFile.currentPos>=currFile.fileSize)

    340. 

  340. 			return EOF;

    341. 

  341. 		else if ((buffer[(currFile.currentPos % 512)]==13) and (buffer[(currFile.currentPos % 512)+1]==10))

    342. 

  342. 		{

    343. 

  343. 			currFile.currentPos+=2;

    344. 

  344. 			return bufIndex;

    345. 

  345. 		}

    346. 

  346. 		else if ((buffer[(currFile.currentPos % 512)]==13) or (buffer[(currFile.currentPos % 512)]==10))

    347. 

  347. 		{

    348. 

  348. 			currFile.currentPos++;

    349. 

  349. 			return bufIndex;

    350. 

  350. 		}

    351. 

  351. 		else

    352. 

  352. 			return BUFFER_OVERFLOW;

    353. 

  353. 	}

    354. 

  354. 	else

    355. 

  355. 		if (currFile.fileMode==0x00)

    356. 

  356. 			return ERROR_NO_FILE_OPEN;

    357. 

  357. 		else

    358. 

  358. 			return ERROR_WRONG_FILEMODE;

    359. 

  359. }

    360. 

  360. 

    361. 

  361. uint16_t tinyFAT::writeLn(char *st)

    362. 

  362. {

    363. 

  363. 	unsigned long currSec = firstDirSector;

    364. 

  364. 	uint16_t nextCluster = 0;

    365. 

  365. 	word offset = -32;

    366. 

  366. 	uint32_t sec;

    367. 

  367. 	char tmpFN[13];

    368. 

  368. 	int i, j;

    369. 

  369. 	int bufIndex=0;

    370. 

  370. 	boolean done=false;

    371. 

  371. 

    372. 

  372. 	if (currFile.fileMode==FILEMODE_TEXT_WRITE)

    373. 

  373. 	{

    374. 

  374. 		if (currFile.currentCluster==0)

    375. 

  375. 		{

    376. 

  376. 			currFile.currentCluster=findFreeCluster();

    377. 

  377. 

    378. 

  378. 			mmc::readSector(buffer, currSec);

    379. 

  379. 			while (!done)

    380. 

  380. 			{

    381. 

  381. 				offset+=32;

    382. 

  382. 				if (offset==512)

    383. 

  383. 				{

    384. 

  384. 				  currSec++;

    385. 

  385. 				  mmc::readSector(buffer, currSec);

    386. 

  386. 				  offset = 0;

    387. 

  387. 				} 

    388. 

  388. 

    389. 

  389. 				j=0;

    390. 

  390. 				for (int i=0; i<8; i++)

    391. 

  391. 				{

    392. 

  392. 					if (buffer[i+offset]!=0x20)

    393. 

  393. 					{

    394. 

  394. 						tmpFN[j]=buffer[i+offset];

    395. 

  395. 						j++;

    396. 

  396. 					}

    397. 

  397. 				}

    398. 

  398. 				tmpFN[j]='.';

    399. 

  399. 				j++;

    400. 

  400. 				for (int i=0; i<3; i++)

    401. 

  401. 				{

    402. 

  402. 					if (buffer[i+0x08+offset]!=0x20)

    403. 

  403. 					{

    404. 

  404. 						tmpFN[j]=buffer[i+0x08+offset];

    405. 

  405. 						j++;

    406. 

  406. 					}

    407. 

  407. 				}

    408. 

  408. 				tmpFN[j]=0x00;

    409. 

  409. 				

    410. 

  410. 				if (!strcmp(tmpFN, currFile.filename))

    411. 

  411. 				{

    412. 

  412. 					buffer[offset+0x1A]=currFile.currentCluster & 0xFF;

    413. 

  413. 					buffer[offset+0x1B]=currFile.currentCluster>>8;

    414. 

  414. 

    415. 

  415. 					mmc::writeSector(buffer, currSec);

    416. 

  416. 

    417. 

  417. 					mmc::readSector(buffer, BS.fat1Start+(currFile.currentCluster>>8));

    418. 

  418. 					buffer[(currFile.currentCluster & 0xFF)*2]=0xFF;

    419. 

  419. 					buffer[((currFile.currentCluster & 0xFF)*2)+1]=0xFF;

    420. 

  420. 					mmc::writeSector(buffer, BS.fat1Start+(currFile.currentCluster>>8));

    421. 

  421. 

    422. 

  422. 					mmc::readSector(buffer, BS.fat2Start+(currFile.currentCluster>>8));

    423. 

  423. 					buffer[(currFile.currentCluster & 0xFF)*2]=0xFF;

    424. 

  424. 					buffer[((currFile.currentCluster & 0xFF)*2)+1]=0xFF;

    425. 

  425. 					mmc::writeSector(buffer, BS.fat2Start+(currFile.currentCluster>>8));

    426. 

  426. 

    427. 

  427. 					done=true;

    428. 

  428. 				}

    429. 

  429. 			}

    430. 

  430. 

    431. 

  431. 		}

    432. 

  432. 

    433. 

  433. 		if ((((currFile.fileSize % 512)+strlen(st))<=510) and ((currFile.fileSize % (long(BS.sectorsPerCluster)*512)!=0) or (currFile.fileSize==0)))

    434. 

  434. 		{

    435. 

  435. 			currSec=(BS.reservedSectors+(BS.fatCopies*BS.sectorsPerFAT)+((BS.rootDirectoryEntries*32)/512)+((currFile.currentCluster-2)*BS.sectorsPerCluster)+BS.hiddenSectors)+((currFile.fileSize/512) % BS.sectorsPerCluster);

    436. 

  436. 			mmc::readSector(buffer, currSec);

    437. 

  437. 			for (int i=0; i<strlen(st); i++)

    438. 

  438. 				buffer[(currFile.fileSize%512)+i]=st[i];

    439. 

  439. 			buffer[(currFile.fileSize%512)+strlen(st)]=0x0D;

    440. 

  440. 			buffer[(currFile.fileSize%512)+strlen(st)+1]=0x0A;

    441. 

  441. 			mmc::writeSector(buffer, currSec);

    442. 

  442. 		}

    443. 

  443. 		else

    444. 

  444. 		{

    445. 

  445. 			currSec=(BS.reservedSectors+(BS.fatCopies*BS.sectorsPerFAT)+((BS.rootDirectoryEntries*32)/512)+((currFile.currentCluster-2)*BS.sectorsPerCluster)+BS.hiddenSectors)+((currFile.fileSize/512) % BS.sectorsPerCluster);

    446. 

  446. 

    447. 

  447. 			if ((currFile.fileSize%512)!=0)

    448. 

  448. 			{

    449. 

  449. 				mmc::readSector(buffer, currSec);

    450. 

  450. 				for (int i=0; i<(512-(currFile.fileSize%512)); i++)

    451. 

  451. 				{

    452. 

  452. 					buffer[(currFile.fileSize%512)+i]=st[i];

    453. 

  453. 					bufIndex++;

    454. 

  454. 				}

    455. 

  455. 				mmc::writeSector(buffer, currSec);

    456. 

  456. 				currSec++;

    457. 

  457. 			}

    458. 

  458. 			else

    459. 

  459. 				bufIndex=0;

    460. 

  460. 

    461. 

  461. 			if (((currSec-(BS.reservedSectors+(BS.fatCopies*BS.sectorsPerFAT)+((BS.rootDirectoryEntries*32)/512)+BS.hiddenSectors)) % BS.sectorsPerCluster)==0)

    462. 

  462. 			{

    463. 

  463. 				nextCluster=findFreeCluster();

    464. 

  464. 

    465. 

  465. 				mmc::readSector(buffer, BS.fat1Start+(currFile.currentCluster>>8));

    466. 

  466. 				buffer[(currFile.currentCluster & 0xFF)*2]=nextCluster & 0xFF;

    467. 

  467. 				buffer[((currFile.currentCluster & 0xFF)*2)+1]=nextCluster>>8;

    468. 

  468. 				if ((nextCluster>>8)==(currFile.currentCluster>>8))

    469. 

  469. 				{

    470. 

  470. 					buffer[(nextCluster & 0xFF)*2]=0xFF;

    471. 

  471. 					buffer[((nextCluster & 0xFF)*2)+1]=0xFF;

    472. 

  472. 					mmc::writeSector(buffer, BS.fat1Start+(currFile.currentCluster>>8));

    473. 

  473. 				}

    474. 

  474. 				else

    475. 

  475. 				{

    476. 

  476. 					mmc::writeSector(buffer, BS.fat1Start+(currFile.currentCluster>>8));

    477. 

  477. 					mmc::readSector(buffer, BS.fat1Start+(nextCluster>>8));

    478. 

  478. 					buffer[(nextCluster & 0xFF)*2]=0xFF;

    479. 

  479. 					buffer[((nextCluster & 0xFF)*2)+1]=0xFF;

    480. 

  480. 					mmc::writeSector(buffer, BS.fat1Start+(nextCluster>>8));

    481. 

  481. 				}

    482. 

  482. 

    483. 

  483. 				mmc::readSector(buffer, BS.fat2Start+(currFile.currentCluster>>8));

    484. 

  484. 				buffer[(currFile.currentCluster & 0xFF)*2]=nextCluster & 0xFF;

    485. 

  485. 				buffer[((currFile.currentCluster & 0xFF)*2)+1]=nextCluster>>8;

    486. 

  486. 				if ((nextCluster>>8)==(currFile.currentCluster>>8))

    487. 

  487. 				{

    488. 

  488. 					buffer[(nextCluster & 0xFF)*2]=0xFF;

    489. 

  489. 					buffer[((nextCluster & 0xFF)*2)+1]=0xFF;

    490. 

  490. 					mmc::writeSector(buffer, BS.fat2Start+(currFile.currentCluster>>8));

    491. 

  491. 				}

    492. 

  492. 				else

    493. 

  493. 				{

    494. 

  494. 					mmc::writeSector(buffer, BS.fat2Start+(currFile.currentCluster>>8));

    495. 

  495. 					mmc::readSector(buffer, BS.fat2Start+(nextCluster>>8));

    496. 

  496. 					buffer[(nextCluster & 0xFF)*2]=0xFF;

    497. 

  497. 					buffer[((nextCluster & 0xFF)*2)+1]=0xFF;

    498. 

  498. 					mmc::writeSector(buffer, BS.fat2Start+(nextCluster>>8));

    499. 

  499. 				}

    500. 

  500. 

    501. 

  501. 				currFile.currentCluster=nextCluster;

    502. 

  502. 

    503. 

  503. 				currSec=(BS.reservedSectors+(BS.fatCopies*BS.sectorsPerFAT)+((BS.rootDirectoryEntries*32)/512)+((currFile.currentCluster-2)*BS.sectorsPerCluster)+BS.hiddenSectors);

    504. 

  504. 			}

    505. 

  505. 			mmc::readSector(buffer, currSec);

    506. 

  506. 			for (int i=0; i<strlen(st)-bufIndex; i++)

    507. 

  507. 				buffer[i]=st[i+bufIndex];

    508. 

  508. 			buffer[strlen(st)-bufIndex]=0x0D;

    509. 

  509. 			buffer[strlen(st)-bufIndex+1]=0x0A;

    510. 

  510. 			mmc::writeSector(buffer, currSec);

    511. 

  511. 

    512. 

  512. 

    513. 

  513. 		}

    514. 

  514. 

    515. 

  515. 		currFile.fileSize+=(strlen(st)+2);

    516. 

  516. 

    517. 

  517. 		currSec=firstDirSector;

    518. 

  518. 		offset=-32;

    519. 

  519. 		done=false;

    520. 

  520. 		mmc::readSector(buffer, currSec);

    521. 

  521. 		while (!done)

    522. 

  522. 		{

    523. 

  523. 			offset+=32;

    524. 

  524. 			if (offset==512)

    525. 

  525. 			{

    526. 

  526. 			  currSec++;

    527. 

  527. 			  mmc::readSector(buffer, currSec);

    528. 

  528. 			  offset = 0;

    529. 

  529. 			} 

    530. 

  530. 

    531. 

  531. 			j=0;

    532. 

  532. 			for (int i=0; i<8; i++)

    533. 

  533. 			{

    534. 

  534. 				if (buffer[i+offset]!=0x20)

    535. 

  535. 				{

    536. 

  536. 					tmpFN[j]=buffer[i+offset];

    537. 

  537. 					j++;

    538. 

  538. 				}

    539. 

  539. 			}

    540. 

  540. 			tmpFN[j]='.';

    541. 

  541. 			j++;

    542. 

  542. 			for (int i=0; i<3; i++)

    543. 

  543. 			{

    544. 

  544. 				if (buffer[i+0x08+offset]!=0x20)

    545. 

  545. 				{

    546. 

  546. 					tmpFN[j]=buffer[i+0x08+offset];

    547. 

  547. 					j++;

    548. 

  548. 				}

    549. 

  549. 			}

    550. 

  550. 			tmpFN[j]=0x00;

    551. 

  551. 

    552. 

  552. 			if (!strcmp(tmpFN, currFile.filename))

    553. 

  553. 			{

    554. 

  554. 				buffer[offset+0x1C]=currFile.fileSize & 0xFF;

    555. 

  555. 				buffer[offset+0x1D]=(currFile.fileSize & 0xFF00)>>8;

    556. 

  556. 				buffer[offset+0x1E]=(currFile.fileSize & 0xFF0000)>>16;

    557. 

  557. 				buffer[offset+0x1F]=currFile.fileSize>>24;

    558. 

  558. 

    559. 

  559. 				mmc::writeSector(buffer, currSec);

    560. 

  560. 

    561. 

  561. 				done=true;

    562. 

  562. 			}

    563. 

  563. 		}

    564. 

  564. 

    565. 

  565. 		return NO_ERROR;

    566. 

  566. 	}

    567. 

  567. 	else

    568. 

  568. 		if (currFile.fileMode==0x00)

    569. 

  569. 			return ERROR_NO_FILE_OPEN;

    570. 

  570. 		else

    571. 

  571. 			return ERROR_WRONG_FILEMODE;

    572. 

  572. }

    573. 

  573. 

    574. 

  574. void tinyFAT::closeFile()

    575. 

  575. {

    576. 

  576. 	currFile.filename[0]=0x00;

    577. 

  577. 	currFile.fileMode=0x00;

    578. 

  578. }

    579. 

  579. 

    580. 

  580. boolean tinyFAT::exists(char *fn)

    581. 

  581. {

    582. 

  582. 	_directory_entry tmpDE;

    583. 

  583. 	char tmpFN[13];

    584. 

  584. 	byte res;

    585. 

  585. 	int i, j;

    586. 

  586. 

    587. 

  587. 	for (i=0; i<strlen(fn); i++)

    588. 

  588. 		fn[i]=uCase(fn[i]);

    589. 

  589. 

    590. 

  590. 	res=findFirstFile(&tmpDE);

    591. 

  591. 	if (res==ERROR_NO_MORE_FILES)

    592. 

  592. 		return false;

    593. 

  593. 	else

    594. 

  594. 	{

    595. 

  595. 		i=0;

    596. 

  596. 		j=0;

    597. 

  597. 		while ((tmpDE.filename[i]!=0x20) and (i<8))

    598. 

  598. 		{

    599. 

  599. 			tmpFN[i]=tmpDE.filename[i];

    600. 

  600. 			i++;

    601. 

  601. 		}

    602. 

  602. 		tmpFN[i]='.';

    603. 

  603. 		i++;

    604. 

  604. 		while ((tmpDE.fileext[j]!=0x20) and (j<3))

    605. 

  605. 		{

    606. 

  606. 			tmpFN[i]=tmpDE.fileext[j];

    607. 

  607. 			i++;

    608. 

  608. 			j++;

    609. 

  609. 		}

    610. 

  610. 		tmpFN[i]=0x00;

    611. 

  611. 		if (!strcmp(tmpFN,fn))

    612. 

  612. 			return true;

    613. 

  613. 		while (res==NO_ERROR)

    614. 

  614. 		{

    615. 

  615. 			res = file.findNextFile(&tmpDE);

    616. 

  616. 			if (res==NO_ERROR)

    617. 

  617. 			{

    618. 

  618. 				i=0;

    619. 

  619. 				j=0;

    620. 

  620. 				while ((tmpDE.filename[i]!=0x20) and (i<8))

    621. 

  621. 				{

    622. 

  622. 					tmpFN[i]=tmpDE.filename[i];

    623. 

  623. 					i++;

    624. 

  624. 				}

    625. 

  625. 				tmpFN[i]='.';

    626. 

  626. 				i++;

    627. 

  627. 				while ((tmpDE.fileext[j]!=0x20) and (j<3))

    628. 

  628. 				{

    629. 

  629. 					tmpFN[i]=tmpDE.fileext[j];

    630. 

  630. 					i++;

    631. 

  631. 					j++;

    632. 

  632. 				}

    633. 

  633. 				tmpFN[i]=0x00;

    634. 

  634. 				if (!strcmp(tmpFN,fn))

    635. 

  635. 					return true;

    636. 

  636. 			}

    637. 

  637. 		}

    638. 

  638. 	}

    639. 

  639. 	return false;

    640. 

  640. }

    641. 

  641. 

    642. 

  642. boolean tinyFAT::rename(char *fn1, char *fn2)

    643. 

  643. {

    644. 

  644. 	unsigned long currSec = firstDirSector;

    645. 

  645. 	word offset = -32;

    646. 

  646. 	char tmpFN[13];

    647. 

  647. 	int i, j;

    648. 

  648. 	boolean done=false;

    649. 

  649. 

    650. 

  650. 	for (i=0; i<strlen(fn1); i++)

    651. 

  651. 		fn1[i]=uCase(fn1[i]);

    652. 

  652. 

    653. 

  653. 	for (i=0; i<strlen(fn2); i++)

    654. 

  654. 	{

    655. 

  655. 		fn2[i]=uCase(fn2[i]);

    656. 

  656. 		if (!validChar(fn2[i]))

    657. 

  657. 			return false;

    658. 

  658. 	}

    659. 

  659. 

    660. 

  660. 	if (exists(fn1))

    661. 

  661. 	{

    662. 

  662. 		mmc::readSector(buffer, currSec);

    663. 

  663. 		while (!done)

    664. 

  664. 		{

    665. 

  665. 			offset+=32;

    666. 

  666. 			if (offset==512)

    667. 

  667. 			{

    668. 

  668. 			  currSec++;

    669. 

  669. 			  mmc::readSector(buffer, currSec);

    670. 

  670. 			  offset = 0;

    671. 

  671. 			} 

    672. 

  672. 

    673. 

  673. 			j=0;

    674. 

  674. 			for (int i=0; i<8; i++)

    675. 

  675. 			{

    676. 

  676. 				if (buffer[i+offset]!=0x20)

    677. 

  677. 				{

    678. 

  678. 					tmpFN[j]=buffer[i+offset];

    679. 

  679. 					j++;

    680. 

  680. 				}

    681. 

  681. 			}

    682. 

  682. 			tmpFN[j]='.';

    683. 

  683. 			j++;

    684. 

  684. 			for (int i=0; i<3; i++)

    685. 

  685. 			{

    686. 

  686. 				if (buffer[i+0x08+offset]!=0x20)

    687. 

  687. 				{

    688. 

  688. 					tmpFN[j]=buffer[i+0x08+offset];

    689. 

  689. 					j++;

    690. 

  690. 				}

    691. 

  691. 			}

    692. 

  692. 			tmpFN[j]=0x00;

    693. 

  693. 			if (!strcmp(tmpFN, fn1))

    694. 

  694. 			{

    695. 

  695. 				for (int i=0; i<11; i++)

    696. 

  696. 				{

    697. 

  697. 					buffer[i+offset]=0x20;

    698. 

  698. 				}

    699. 

  699. 				j=0;

    700. 

  700. 				for (int i=0; i<strlen(fn2); i++)

    701. 

  701. 				{

    702. 

  702. 					if (fn2[i]=='.')

    703. 

  703. 						j=8;

    704. 

  704. 					else

    705. 

  705. 					{

    706. 

  706. 						buffer[j+offset]=fn2[i];

    707. 

  707. 						j++;

    708. 

  708. 					}

    709. 

  709. 				}

    710. 

  710. 				mmc::writeSector(buffer, currSec);

    711. 

  711. 				done=true;

    712. 

  712. 			}

    713. 

  713. 		}

    714. 

  714. 

    715. 

  715. 		return true;

    716. 

  716. 	}

    717. 

  717. 	else

    718. 

  718. 		return false;

    719. 

  719. }

    720. 

  720. 

    721. 

  721. boolean tinyFAT::delFile(char *fn)

    722. 

  722. {

    723. 

  723. 	unsigned long currSec = firstDirSector;

    724. 

  724. 	uint16_t firstCluster, currCluster, nextCluster;

    725. 

  725. 	word offset = -32;

    726. 

  726. 	char tmpFN[13];

    727. 

  727. 	int j;

    728. 

  728. 	boolean done=false;

    729. 

  729. 

    730. 

  730. 	for (int i=0; i<strlen(fn); i++)

    731. 

  731. 		fn[i]=uCase(fn[i]);

    732. 

  732. 

    733. 

  733. 	if (exists(fn))

    734. 

  734. 	{

    735. 

  735. 		mmc::readSector(buffer, currSec);

    736. 

  736. 		while (!done)

    737. 

  737. 		{

    738. 

  738. 			offset+=32;

    739. 

  739. 			if (offset==512)

    740. 

  740. 			{

    741. 

  741. 			  currSec++;

    742. 

  742. 			  mmc::readSector(buffer, currSec);

    743. 

  743. 			  offset = 0;

    744. 

  744. 			} 

    745. 

  745. 

    746. 

  746. 			j=0;

    747. 

  747. 			for (int i=0; i<8; i++)

    748. 

  748. 			{

    749. 

  749. 				if (buffer[i+offset]!=0x20)

    750. 

  750. 				{

    751. 

  751. 					tmpFN[j]=buffer[i+offset];

    752. 

  752. 					j++;

    753. 

  753. 				}

    754. 

  754. 			}

    755. 

  755. 			tmpFN[j]='.';

    756. 

  756. 			j++;

    757. 

  757. 			for (int i=0; i<3; i++)

    758. 

  758. 			{

    759. 

  759. 				if (buffer[i+0x08+offset]!=0x20)

    760. 

  760. 				{

    761. 

  761. 					tmpFN[j]=buffer[i+0x08+offset];

    762. 

  762. 					j++;

    763. 

  763. 				}

    764. 

  764. 			}

    765. 

  765. 			tmpFN[j]=0x00;

    766. 

  766. 			if (!strcmp(tmpFN, fn))

    767. 

  767. 			{

    768. 

  768. 				buffer[offset]=0xE5;

    769. 

  769. 				firstCluster = uint16_t(buffer[0x1A + offset]) + (uint16_t(buffer[0x1B + offset])<<8);

    770. 

  770. 				mmc::writeSector(buffer, currSec);

    771. 

  771. 				

    772. 

  772. 				if (firstCluster!=0)

    773. 

  773. 				{

    774. 

  774. 					currSec=firstCluster/256;

    775. 

  775. 					mmc::readSector(buffer, BS.fat1Start+currSec);

    776. 

  776. 					currCluster=firstCluster;

    777. 

  777. 					nextCluster=0;

    778. 

  778. 					while (nextCluster!=0xFFFF)

    779. 

  779. 					{

    780. 

  780. 						nextCluster = buffer[(currCluster % 256)*2] + (buffer[((currCluster % 256)*2)+1]<<8);

    781. 

  781. 						buffer[(currCluster % 256)*2]=0;

    782. 

  782. 						buffer[((currCluster % 256)*2)+1]=0;

    783. 

  783. 						if (((currCluster/256) != (nextCluster/256)) and (nextCluster!=0xFFFF))

    784. 

  784. 						{

    785. 

  785. 							mmc::writeSector(buffer, BS.fat1Start+currSec);

    786. 

  786. 							currSec=nextCluster/256;

    787. 

  787. 							mmc::readSector(buffer, BS.fat1Start+currSec);

    788. 

  788. 

    789. 

  789. 						}

    790. 

  790. 						currCluster=nextCluster;

    791. 

  791. 					}

    792. 

  792. 					mmc::writeSector(buffer, BS.fat1Start+currSec);

    793. 

  793. 

    794. 

  794. 					currSec=firstCluster/256;

    795. 

  795. 					mmc::readSector(buffer, BS.fat2Start+currSec);

    796. 

  796. 					currCluster=firstCluster;

    797. 

  797. 					nextCluster=0;

    798. 

  798. 					while (nextCluster!=0xFFFF)

    799. 

  799. 					{

    800. 

  800. 						nextCluster = buffer[(currCluster % 256)*2] + (buffer[((currCluster % 256)*2)+1]<<8);

    801. 

  801. 						buffer[(currCluster % 256)*2]=0;

    802. 

  802. 						buffer[((currCluster % 256)*2)+1]=0;

    803. 

  803. 						if (((currCluster/256) != (nextCluster/256)) and (nextCluster!=0xFFFF))

    804. 

  804. 						{

    805. 

  805. 							mmc::writeSector(buffer, BS.fat2Start+currSec);

    806. 

  806. 							currSec=nextCluster/256;

    807. 

  807. 							mmc::readSector(buffer, BS.fat2Start+currSec);

    808. 

  808. 

    809. 

  809. 						}

    810. 

  810. 						currCluster=nextCluster;

    811. 

  811. 					}

    812. 

  812. 				mmc::writeSector(buffer, BS.fat2Start+currSec);

    813. 

  813. 				}

    814. 

  814. 

    815. 

  815. 				done=true;

    816. 

  816. 			}

    817. 

  817. 		}

    818. 

  818. 

    819. 

  819. 		return true;

    820. 

  820. 	}

    821. 

  821. 	else

    822. 

  822. 		return false;

    823. 

  823. }

    824. 

  824. 

    825. 

  825. boolean tinyFAT::create(char *fn)

    826. 

  826. {

    827. 

  827. 	unsigned long currSec;

    828. 

  828. 	word offset = 0;

    829. 

  829. 	boolean done=false;

    830. 

  830. 	int j;

    831. 

  831. 

    832. 

  832. 	for (int i=0; i<strlen(fn); i++)

    833. 

  833. 	{

    834. 

  834. 		fn[i]=uCase(fn[i]);

    835. 

  835. 		if (!validChar(fn[i]))

    836. 

  836. 			return false;

    837. 

  837. 	}

    838. 

  838. 

    839. 

  839. 	if (!exists(fn))

    840. 

  840. 	{

    841. 

  841. 		currSec = firstDirSector;

    842. 

  842. 		mmc::readSector(buffer, currSec);

    843. 

  843. 		offset = -32;

    844. 

  844. 		while (!done)

    845. 

  845. 		{

    846. 

  846. 			offset+=32;

    847. 

  847. 			if (offset==512)

    848. 

  848. 			{

    849. 

  849. 			  currSec++;

    850. 

  850. 			  mmc::readSector(buffer, currSec);

    851. 

  851. 			  offset = 0;

    852. 

  852. 			} 

    853. 

  853. 

    854. 

  854. 			if ((buffer[offset]==0x00) or (buffer[offset]==0xE5))

    855. 

  855. 			{

    856. 

  856. 				for (int i=0; i<11; i++)

    857. 

  857. 				{

    858. 

  858. 					buffer[i+offset]=0x20;

    859. 

  859. 				}

    860. 

  860. 				j=0;

    861. 

  861. 				for (int i=0; i<strlen(fn); i++)

    862. 

  862. 				{

    863. 

  863. 					if (fn[i]=='.')

    864. 

  864. 						j=8;

    865. 

  865. 					else

    866. 

  866. 					{

    867. 

  867. 						buffer[j+offset]=fn[i];

    868. 

  868. 						j++;

    869. 

  869. 					}

    870. 

  870. 				}

    871. 

  871. 				

    872. 

  872. 				for (int i=0x0b; i<0x20; i++)

    873. 

  873. 					buffer[offset+i]=0;

    874. 

  874. 				buffer[offset+0x0b]=0x20;

    875. 

  875. 				buffer[offset+0x0f]=0x60;

    876. 

  876. 				buffer[offset+0x10]=0x21;

    877. 

  877. 				buffer[offset+0x11]=0x3E;

    878. 

  878. 				buffer[offset+0x12]=0x21;

    879. 

  879. 				buffer[offset+0x13]=0x3E;

    880. 

  880. 				buffer[offset+0x17]=0x60;

    881. 

  881. 				buffer[offset+0x18]=0x21;

    882. 

  882. 				buffer[offset+0x19]=0x3E;

    883. 

  883. 

    884. 

  884. 				mmc::writeSector(buffer, currSec);

    885. 

  885. 

    886. 

  886. 				done=true;

    887. 

  887. 			}

    888. 

  888. 		}

    889. 

  889. 		return true;

    890. 

  890. 	}

    891. 

  891. 	else

    892. 

  892. 		return false;

    893. 

  893. }

    894. 

  894. 

    895. 

  895. /* Private */

    896. 

  896. 

    897. 

  897. uint16_t tinyFAT::findNextCluster(uint16_t cc)

    898. 

  898. {

    899. 

  899. 	uint16_t nc;

    900. 

  900. 	mmc::readSector(buffer, BS.fat1Start+int(cc/256));

    901. 

  901. 	nc = buffer[(cc % 256)*2] + (buffer[((cc % 256)*2)+1]<<8);

    902. 

  902. 	return nc;

    903. 

  903. }

    904. 

  904. 

    905. 

  905. char tinyFAT::uCase(char c)

    906. 

  906. {

    907. 

  907. 	if ((c>='a') && (c<='z'))

    908. 

  908. 		return (c-0x20);

    909. 

  909. 	else

    910. 

  910. 		return c;

    911. 

  911. }

    912. 

  912. 

    913. 

  913. boolean tinyFAT::validChar(char c)

    914. 

  914. {

    915. 

  915. 	char valid[]= "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!#$&'()-@^_`{}~.";

    916. 

  916. 

    917. 

  917. 	for (int i=0; i<strlen(valid); i++)

    918. 

  918. 		if (c==valid[i])

    919. 

  919. 			return true;

    920. 

  920. 	return false;

    921. 

  921. }

    922. 

  922. 

    923. 

  923. uint16_t tinyFAT::findFreeCluster()

    924. 

  924. {

    925. 

  925. 	unsigned long currSec=0;

    926. 

  926. 	word firstFreeCluster=0;

    927. 

  927. 	word offset=0;

    928. 

  928. 

    929. 

  929. 	while ((firstFreeCluster==0) and (currSec<=BS.sectorsPerFAT))

    930. 

  930. 	{

    931. 

  931. 		mmc::readSector(buffer, BS.fat1Start+currSec);

    932. 

  932. 		while ((firstFreeCluster==0) and (offset<=512))

    933. 

  933. 		{

    934. 

  934. 			if ((buffer[offset] + (buffer[offset+1]<<8))==0)

    935. 

  935. 				firstFreeCluster=(currSec<<8)+(offset/2);

    936. 

  936. 			else

    937. 

  937. 				offset+=2;

    938. 

  938. 		}

    939. 

  939. 		offset=0;

    940. 

  940. 		currSec++;

    941. 

  941. 	}

    942. 

  942. }

    943. 

  943. 

    944. 

  944. void tinyFAT::setSSpin(byte pin)

    945. 

  945. {

    946. 

  946. 	if (_inited==false)

    947. 

  947. 		mmc::setSSpin(pin);

    948. 

  948. }

    949. 

  949. 

    950. 

  950. /* Declarations */

    951. 

  951. 

    952. 

  952. tinyFAT file = tinyFAT();
    953.