EmbeddedArtists AB
/
app_sdcard
Example using the MCIFileSystem class in EALib to access an uSD card.
main.cpp@2:a5a0291d5a5c, 2014-04-09 (annotated)
- Committer:
- embeddedartists
- Date:
- Wed Apr 09 10:35:12 2014 +0000
- Revision:
- 2:a5a0291d5a5c
- Parent:
- 0:9b273b2aef38
Updated to latest version of EALib
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
embeddedartists | 0:9b273b2aef38 | 1 | /****************************************************************************** |
embeddedartists | 0:9b273b2aef38 | 2 | * Includes |
embeddedartists | 0:9b273b2aef38 | 3 | *****************************************************************************/ |
embeddedartists | 0:9b273b2aef38 | 4 | |
embeddedartists | 0:9b273b2aef38 | 5 | #include "mbed.h" |
embeddedartists | 0:9b273b2aef38 | 6 | #include "MCIFileSystem.h" |
embeddedartists | 0:9b273b2aef38 | 7 | |
embeddedartists | 0:9b273b2aef38 | 8 | /****************************************************************************** |
embeddedartists | 0:9b273b2aef38 | 9 | * Typedefs and defines |
embeddedartists | 0:9b273b2aef38 | 10 | *****************************************************************************/ |
embeddedartists | 0:9b273b2aef38 | 11 | |
embeddedartists | 0:9b273b2aef38 | 12 | typedef bool (*syncFunc)(const char* name, bool isDir); |
embeddedartists | 0:9b273b2aef38 | 13 | |
embeddedartists | 0:9b273b2aef38 | 14 | /****************************************************************************** |
embeddedartists | 0:9b273b2aef38 | 15 | * Local variables |
embeddedartists | 0:9b273b2aef38 | 16 | *****************************************************************************/ |
embeddedartists | 0:9b273b2aef38 | 17 | |
embeddedartists | 0:9b273b2aef38 | 18 | MCIFileSystem mcifs("mci"); |
embeddedartists | 0:9b273b2aef38 | 19 | |
embeddedartists | 0:9b273b2aef38 | 20 | DigitalOut myled1(LED1); |
embeddedartists | 0:9b273b2aef38 | 21 | DigitalOut myled2(LED2); |
embeddedartists | 0:9b273b2aef38 | 22 | |
embeddedartists | 0:9b273b2aef38 | 23 | /****************************************************************************** |
embeddedartists | 0:9b273b2aef38 | 24 | * Local functions |
embeddedartists | 0:9b273b2aef38 | 25 | *****************************************************************************/ |
embeddedartists | 0:9b273b2aef38 | 26 | |
embeddedartists | 0:9b273b2aef38 | 27 | static void ledShowProgress() |
embeddedartists | 0:9b273b2aef38 | 28 | { |
embeddedartists | 0:9b273b2aef38 | 29 | static int state = 0; |
embeddedartists | 0:9b273b2aef38 | 30 | state = (state + 1) % 2; |
embeddedartists | 0:9b273b2aef38 | 31 | switch (state) |
embeddedartists | 0:9b273b2aef38 | 32 | { |
embeddedartists | 0:9b273b2aef38 | 33 | case 0: |
embeddedartists | 0:9b273b2aef38 | 34 | myled1 = 1; |
embeddedartists | 0:9b273b2aef38 | 35 | myled2 = 0; |
embeddedartists | 0:9b273b2aef38 | 36 | break; |
embeddedartists | 0:9b273b2aef38 | 37 | |
embeddedartists | 0:9b273b2aef38 | 38 | case 1: |
embeddedartists | 0:9b273b2aef38 | 39 | default: |
embeddedartists | 0:9b273b2aef38 | 40 | myled1 = 0; |
embeddedartists | 0:9b273b2aef38 | 41 | myled2 = 1; |
embeddedartists | 0:9b273b2aef38 | 42 | } |
embeddedartists | 0:9b273b2aef38 | 43 | } |
embeddedartists | 0:9b273b2aef38 | 44 | |
embeddedartists | 0:9b273b2aef38 | 45 | static void handleError(const char* msg) |
embeddedartists | 0:9b273b2aef38 | 46 | { |
embeddedartists | 0:9b273b2aef38 | 47 | printf(msg); |
embeddedartists | 0:9b273b2aef38 | 48 | while(true) { |
embeddedartists | 0:9b273b2aef38 | 49 | myled1 = 1; |
embeddedartists | 0:9b273b2aef38 | 50 | myled2 = 1; |
embeddedartists | 0:9b273b2aef38 | 51 | wait(0.3); |
embeddedartists | 0:9b273b2aef38 | 52 | myled1 = 0; |
embeddedartists | 0:9b273b2aef38 | 53 | myled2 = 0; |
embeddedartists | 0:9b273b2aef38 | 54 | wait(0.3); |
embeddedartists | 0:9b273b2aef38 | 55 | } |
embeddedartists | 0:9b273b2aef38 | 56 | } |
embeddedartists | 0:9b273b2aef38 | 57 | |
embeddedartists | 0:9b273b2aef38 | 58 | static bool recursiveProcessFS(char* buff, const char* name, syncFunc func, bool adding) |
embeddedartists | 0:9b273b2aef38 | 59 | { |
embeddedartists | 0:9b273b2aef38 | 60 | uint32_t len = strlen(buff); |
embeddedartists | 0:9b273b2aef38 | 61 | if (len > 0) { |
embeddedartists | 0:9b273b2aef38 | 62 | if (buff[len - 1] != '/') { |
embeddedartists | 0:9b273b2aef38 | 63 | buff[len++] = '/'; |
embeddedartists | 0:9b273b2aef38 | 64 | buff[len] = '\0'; |
embeddedartists | 0:9b273b2aef38 | 65 | } |
embeddedartists | 0:9b273b2aef38 | 66 | } |
embeddedartists | 0:9b273b2aef38 | 67 | strcat(buff, name); |
embeddedartists | 0:9b273b2aef38 | 68 | len += strlen(name); |
embeddedartists | 0:9b273b2aef38 | 69 | |
embeddedartists | 0:9b273b2aef38 | 70 | if (len > 60) { |
embeddedartists | 0:9b273b2aef38 | 71 | // ugly fix to avoid crashes that occurs when file name is larger than buffer |
embeddedartists | 0:9b273b2aef38 | 72 | // in FATFileSystem. |
embeddedartists | 0:9b273b2aef38 | 73 | printf("skipped: %s\n", buff); |
embeddedartists | 0:9b273b2aef38 | 74 | return true; |
embeddedartists | 0:9b273b2aef38 | 75 | } |
embeddedartists | 0:9b273b2aef38 | 76 | |
embeddedartists | 0:9b273b2aef38 | 77 | DIR *d = opendir(buff); |
embeddedartists | 0:9b273b2aef38 | 78 | bool result = true; // success |
embeddedartists | 0:9b273b2aef38 | 79 | if (d != NULL) { |
embeddedartists | 0:9b273b2aef38 | 80 | if (adding) { |
embeddedartists | 0:9b273b2aef38 | 81 | // when processing in adding mode folders must be created before it's content |
embeddedartists | 0:9b273b2aef38 | 82 | result = func(buff, true); |
embeddedartists | 0:9b273b2aef38 | 83 | } |
embeddedartists | 0:9b273b2aef38 | 84 | struct dirent *p; |
embeddedartists | 0:9b273b2aef38 | 85 | while (result && ((p = readdir(d)) != NULL)) { |
embeddedartists | 0:9b273b2aef38 | 86 | result = recursiveProcessFS(buff, p->d_name, func, adding); |
embeddedartists | 0:9b273b2aef38 | 87 | buff[len] = '\0'; |
embeddedartists | 0:9b273b2aef38 | 88 | } |
embeddedartists | 0:9b273b2aef38 | 89 | closedir(d); |
embeddedartists | 0:9b273b2aef38 | 90 | if (result && !adding) { |
embeddedartists | 0:9b273b2aef38 | 91 | // when processing in removing mode folders must be deleted after it's content |
embeddedartists | 0:9b273b2aef38 | 92 | result = func(buff, true); |
embeddedartists | 0:9b273b2aef38 | 93 | } |
embeddedartists | 0:9b273b2aef38 | 94 | } else { |
embeddedartists | 0:9b273b2aef38 | 95 | // a file |
embeddedartists | 0:9b273b2aef38 | 96 | result = func(buff, false); |
embeddedartists | 0:9b273b2aef38 | 97 | } |
embeddedartists | 0:9b273b2aef38 | 98 | return result; |
embeddedartists | 0:9b273b2aef38 | 99 | } |
embeddedartists | 0:9b273b2aef38 | 100 | |
embeddedartists | 0:9b273b2aef38 | 101 | static uint32_t fileLen(FILE* f) |
embeddedartists | 0:9b273b2aef38 | 102 | { |
embeddedartists | 0:9b273b2aef38 | 103 | uint32_t pos = ftell(f); |
embeddedartists | 0:9b273b2aef38 | 104 | fseek(f, 0, SEEK_END); |
embeddedartists | 0:9b273b2aef38 | 105 | uint32_t size = ftell(f); |
embeddedartists | 0:9b273b2aef38 | 106 | fseek(f, pos, SEEK_SET); |
embeddedartists | 0:9b273b2aef38 | 107 | return size; |
embeddedartists | 0:9b273b2aef38 | 108 | } |
embeddedartists | 0:9b273b2aef38 | 109 | |
embeddedartists | 0:9b273b2aef38 | 110 | static bool copyFH(FILE* fSrc, FILE* fDst) |
embeddedartists | 0:9b273b2aef38 | 111 | { |
embeddedartists | 0:9b273b2aef38 | 112 | char buff[512]; |
embeddedartists | 0:9b273b2aef38 | 113 | uint32_t left = fileLen(fSrc); |
embeddedartists | 0:9b273b2aef38 | 114 | uint32_t num; |
embeddedartists | 0:9b273b2aef38 | 115 | uint32_t chunk; |
embeddedartists | 0:9b273b2aef38 | 116 | |
embeddedartists | 0:9b273b2aef38 | 117 | fseek(fSrc, 0, SEEK_SET); |
embeddedartists | 0:9b273b2aef38 | 118 | do { |
embeddedartists | 0:9b273b2aef38 | 119 | chunk = (left < 512) ? left : 512; |
embeddedartists | 0:9b273b2aef38 | 120 | num = fread(buff, 1, chunk, fSrc); |
embeddedartists | 0:9b273b2aef38 | 121 | if (num > 0) { |
embeddedartists | 0:9b273b2aef38 | 122 | uint32_t tmp = fwrite(buff, 1, num, fDst); |
embeddedartists | 0:9b273b2aef38 | 123 | if (tmp != num) { |
embeddedartists | 0:9b273b2aef38 | 124 | // failed to write |
embeddedartists | 0:9b273b2aef38 | 125 | return false; |
embeddedartists | 0:9b273b2aef38 | 126 | } |
embeddedartists | 0:9b273b2aef38 | 127 | left -= num; |
embeddedartists | 0:9b273b2aef38 | 128 | ledShowProgress(); |
embeddedartists | 0:9b273b2aef38 | 129 | } |
embeddedartists | 0:9b273b2aef38 | 130 | } while(num > 0 && left > 0); |
embeddedartists | 0:9b273b2aef38 | 131 | |
embeddedartists | 0:9b273b2aef38 | 132 | // copied entire file |
embeddedartists | 0:9b273b2aef38 | 133 | return true; |
embeddedartists | 0:9b273b2aef38 | 134 | } |
embeddedartists | 0:9b273b2aef38 | 135 | |
embeddedartists | 0:9b273b2aef38 | 136 | static bool copy(const char* fnameSrc, const char* fnameDest) |
embeddedartists | 0:9b273b2aef38 | 137 | { |
embeddedartists | 0:9b273b2aef38 | 138 | FILE* fhSrc = NULL; |
embeddedartists | 0:9b273b2aef38 | 139 | FILE* fhDest = NULL; |
embeddedartists | 0:9b273b2aef38 | 140 | bool success = false; |
embeddedartists | 0:9b273b2aef38 | 141 | |
embeddedartists | 0:9b273b2aef38 | 142 | do { |
embeddedartists | 0:9b273b2aef38 | 143 | fhSrc = fopen(fnameSrc, "r"); |
embeddedartists | 0:9b273b2aef38 | 144 | if (fhSrc == NULL) { |
embeddedartists | 0:9b273b2aef38 | 145 | break; |
embeddedartists | 0:9b273b2aef38 | 146 | } |
embeddedartists | 0:9b273b2aef38 | 147 | |
embeddedartists | 0:9b273b2aef38 | 148 | fhDest = fopen(fnameDest, "w"); |
embeddedartists | 0:9b273b2aef38 | 149 | if (fhDest == NULL) { |
embeddedartists | 0:9b273b2aef38 | 150 | break; |
embeddedartists | 0:9b273b2aef38 | 151 | } |
embeddedartists | 0:9b273b2aef38 | 152 | |
embeddedartists | 0:9b273b2aef38 | 153 | if (!copyFH(fhSrc, fhDest)) { |
embeddedartists | 0:9b273b2aef38 | 154 | break; |
embeddedartists | 0:9b273b2aef38 | 155 | } |
embeddedartists | 0:9b273b2aef38 | 156 | |
embeddedartists | 0:9b273b2aef38 | 157 | success = true; |
embeddedartists | 0:9b273b2aef38 | 158 | } while (false); |
embeddedartists | 0:9b273b2aef38 | 159 | |
embeddedartists | 0:9b273b2aef38 | 160 | if (fhSrc != NULL) { |
embeddedartists | 0:9b273b2aef38 | 161 | fclose(fhSrc); |
embeddedartists | 0:9b273b2aef38 | 162 | } |
embeddedartists | 0:9b273b2aef38 | 163 | if (fhDest != NULL) { |
embeddedartists | 0:9b273b2aef38 | 164 | fclose(fhDest); |
embeddedartists | 0:9b273b2aef38 | 165 | } |
embeddedartists | 0:9b273b2aef38 | 166 | |
embeddedartists | 0:9b273b2aef38 | 167 | return success; |
embeddedartists | 0:9b273b2aef38 | 168 | } |
embeddedartists | 0:9b273b2aef38 | 169 | |
embeddedartists | 0:9b273b2aef38 | 170 | static bool list(const char* name, bool isDir) |
embeddedartists | 0:9b273b2aef38 | 171 | { |
embeddedartists | 0:9b273b2aef38 | 172 | if (isDir) { |
embeddedartists | 0:9b273b2aef38 | 173 | printf("d: %s\n", name); |
embeddedartists | 0:9b273b2aef38 | 174 | } else { |
embeddedartists | 0:9b273b2aef38 | 175 | FILE* f = fopen(name, "r"); |
embeddedartists | 0:9b273b2aef38 | 176 | if (f != NULL) { |
embeddedartists | 0:9b273b2aef38 | 177 | uint32_t len = fileLen(f); |
embeddedartists | 0:9b273b2aef38 | 178 | printf("f: %7u %s\n", len, name); |
embeddedartists | 0:9b273b2aef38 | 179 | fclose(f); |
embeddedartists | 0:9b273b2aef38 | 180 | } else { |
embeddedartists | 0:9b273b2aef38 | 181 | printf("f: ??? %s\n", name); |
embeddedartists | 0:9b273b2aef38 | 182 | } |
embeddedartists | 0:9b273b2aef38 | 183 | } |
embeddedartists | 0:9b273b2aef38 | 184 | return true; |
embeddedartists | 0:9b273b2aef38 | 185 | } |
embeddedartists | 0:9b273b2aef38 | 186 | |
embeddedartists | 0:9b273b2aef38 | 187 | static void recursiveList(const char* dirname) |
embeddedartists | 0:9b273b2aef38 | 188 | { |
embeddedartists | 0:9b273b2aef38 | 189 | printf("\nRecursive list of file and folders in %s\n", dirname); |
embeddedartists | 0:9b273b2aef38 | 190 | char* buff = (char*)malloc(512); |
embeddedartists | 0:9b273b2aef38 | 191 | if (buff != NULL) |
embeddedartists | 0:9b273b2aef38 | 192 | { |
embeddedartists | 0:9b273b2aef38 | 193 | buff[0] = '\0'; |
embeddedartists | 0:9b273b2aef38 | 194 | recursiveProcessFS(buff, dirname, list, true); |
embeddedartists | 0:9b273b2aef38 | 195 | free(buff); |
embeddedartists | 0:9b273b2aef38 | 196 | } |
embeddedartists | 0:9b273b2aef38 | 197 | } |
embeddedartists | 0:9b273b2aef38 | 198 | |
embeddedartists | 0:9b273b2aef38 | 199 | static void testAppend(const char* filename) |
embeddedartists | 0:9b273b2aef38 | 200 | { |
embeddedartists | 0:9b273b2aef38 | 201 | FILE *fp = fopen(filename, "a"); |
embeddedartists | 0:9b273b2aef38 | 202 | if (fp != NULL) { |
embeddedartists | 0:9b273b2aef38 | 203 | fprintf(fp, "Hello World!"); |
embeddedartists | 0:9b273b2aef38 | 204 | fclose(fp); |
embeddedartists | 0:9b273b2aef38 | 205 | } |
embeddedartists | 0:9b273b2aef38 | 206 | } |
embeddedartists | 0:9b273b2aef38 | 207 | |
embeddedartists | 0:9b273b2aef38 | 208 | /****************************************************************************** |
embeddedartists | 0:9b273b2aef38 | 209 | * Main function |
embeddedartists | 0:9b273b2aef38 | 210 | *****************************************************************************/ |
embeddedartists | 0:9b273b2aef38 | 211 | |
embeddedartists | 0:9b273b2aef38 | 212 | int main() |
embeddedartists | 0:9b273b2aef38 | 213 | { |
embeddedartists | 0:9b273b2aef38 | 214 | printf("\n-----------------\n\nWelcome to the MCI file system example...\n"); |
embeddedartists | 0:9b273b2aef38 | 215 | |
embeddedartists | 0:9b273b2aef38 | 216 | if (!mcifs.cardInserted()) { |
embeddedartists | 0:9b273b2aef38 | 217 | printf("Please insert a SD/MMC card...\n"); |
embeddedartists | 0:9b273b2aef38 | 218 | while (!mcifs.cardInserted()) { |
embeddedartists | 0:9b273b2aef38 | 219 | wait(0.5); |
embeddedartists | 0:9b273b2aef38 | 220 | } |
embeddedartists | 0:9b273b2aef38 | 221 | printf("Card detected!\n"); |
embeddedartists | 0:9b273b2aef38 | 222 | } |
embeddedartists | 0:9b273b2aef38 | 223 | |
embeddedartists | 0:9b273b2aef38 | 224 | recursiveList("/mci/"); |
embeddedartists | 0:9b273b2aef38 | 225 | |
embeddedartists | 0:9b273b2aef38 | 226 | copy("/mci/expanding.txt", "/mci/expanding.old"); |
embeddedartists | 0:9b273b2aef38 | 227 | testAppend("/mci/expanding.txt"); |
embeddedartists | 0:9b273b2aef38 | 228 | |
embeddedartists | 0:9b273b2aef38 | 229 | recursiveList("/mci/"); |
embeddedartists | 0:9b273b2aef38 | 230 | |
embeddedartists | 0:9b273b2aef38 | 231 | handleError("Program completed!\n"); |
embeddedartists | 0:9b273b2aef38 | 232 | } |
embeddedartists | 0:9b273b2aef38 | 233 |