米6体育平台手机版

SLAU131V October 2004 – February 2020

1
1. 2
2. 3
3. 4
4. 5
5. 6
7
1. 8
2. 9
10
1. 11
2. 12
3. 13
  1. 14
4. 15
  1. 16
  2. 17
  3. 18
  4. 19
    1. 20
    2. 21
  5. 22
  6. 23
  7. 24
5. 25
  1. 26
  2. 27
6. 28
  1. 29
  2. 30
  3. 31
  4. 32
7. 33
  1. 34
  2. 35
8. 36
37
1. 38
  1. 39
  2. 40
    1. 41
    2. 42
    3. 43
    4. 44
    5. 45
      1. 46
2. 47
3. 48
  1. 49
  2. 50
    1. 51
    2. 52
    3. 53
  3. 54
    1. 55
    2. 56
4. 57
5. 58
6. 59
60
1. 61
2. 62
3. 63
4. 64
5. 65
  1. 66
  2. 67
6. 68
  1. 69
  2. 70
  3. 71
    1. 72
  4. 73
7. 74
  1. 75
    1. 76
    2. 77
    3. 78
    4. 79
    5. 80
  2. 81
  3. 82
8. 83
  1. 84
  2. 85
  3. 86
    1. 87
  4. 88
  5. 89
  6. 90
  7. 91
  8. 92
  9. 93
9. 94
  1. 95
  2. 96
  3. 97
10. 98
  1. 99
  2. 100
11. 101
12. 102
  1. 103
  2. 104
13. 105
  1. 106
107
1. 108
2. 109
  1. 110
3. 111
4. 112
5. 113
6. 114
7. 115
8. 116
9. 117
10. 118
11. 119
12. 120
121
1. 122
2. 123
  1. 124
3. 125
  1. 126
  2. 127
    1. 128
    2. 129
  3. 130
  4. 131
  5. 132
  6. 133
  7. 134
    1. 135
  8. 136
  9. 137
  10. 138
  11. 139
4. 140
5. 141
  1. 142
  2. 143
  3. 144
6. 145
  1. 146
7. 147
  1. 148
8. 149
9. 150
  1. 151
  2. 152
10. 153
154
1. 155
2. 156
3. 157
4. 158
  1. 159
5. 160
  1. 161
  2. 162
  3. 163
  4. 164
165
1. 166
2. 167
3. 168
4. 169
  1. 170
  2. 171
  3. 172
    1. 173
    2. 174
    3. 175
  4. 176
  5. 177
  6. 178
  7. 179
  8. 180
  9. 181
  10. 182
  11. 183
  12. 184
  13. 185
  14. 186
  15. 187
    1. 188
    2. 189
    3. 190
  16. 191
    1. 192
  17. 193
  18. 194
  19. 195
  20. 196
  21. 197
  22. 198
  23. 199
  24. 200
  25. 201
  26. 202
  27. 203
  28. 204
  29. 205
  30. 206
  31. 207
  32. 208
  33. 209
  34. 210
  35. 211
5. 212
  1. 213
  2. 214
  3. 215
  4. 216
  5. 217
  6. 218
    1. 219
    2. 220
      1. 221
    3. 222
      1. 223
  7. 224
    1. 225
      1. 226
    2. 227
      1. 228
      2. 229
      3. 230
      4.        231
        
                232
        
                233
      5. 234
      6. 235
    3. 236
      1. 237
    4. 238
    5. 239
      1. 240
    6. 241
    7. 242
  8. 243
    1. 244
    2. 245
      1. 246
      2. 247
  9. 248
    1. 249
      1. 250
    2. 251
      1. 252
      2. 253
    3. 254
    4. 255
      1. 256
    5. 257
    6. 258
  10. 259
  11. 260
    1. 261
    2. 262
    3. 263
  12. 264
    1. 265
    2. 266
    3. 267
    4. 268
    5. 269
    6. 270
    7. 271
      1. 272
      2. 273
      3. 274
      4. 275
    8. 276
  13. 277
    1. 278
    2. 279
    3. 280
    4. 281
6. 282
  1. 283
  2. 284
  3. 285
7. 286
  1. 287
  2. 288
  3. 289
8. 290
  1. 291
  2. 292
  3. 293
    1. 294
  4. 295
    1. 296
    2. 297
    3. 298
    4. 299
      1. 300
    5. 301
      1. 302
    6. 303
      1. 304
      2. 305
  5. 306
    1. 307
    2. 308
    3. 309
    4. 310
    5. 311
  6. 312
    1. 313
  7. 314
    1. 315
9. 316
  1. 317
  2. 318
  3. 319
    1. 320
    2. 321
    3. 322
    4. 323
  4. 324
    1. 325
  5. 326
10. 327
11. 328
  1. 329
  2. 330
  3. 331
  4. 332
  5. 333
12. 334
  1. 335
  2. 336
337
1. 338
2. 339
3. 340
  1. 341
  2. 342
343
1. 344
2. 345
3. 346
  1. 347
348
1. 349
2. 350
3. 351
4. 352
353
1. 354
2. 355
  1. 356
  2. 357
3. 358
  1. 359
  2. 360
  3. 361
  4. 362
4. 363
  1. 364
  2. 365
    1. 366
    2. 367
5. 368
6. 369
  1. 370
  2. 371
7. 372
8. 373
9. 374
  1. 375
  2. 376
  3. 377
10. 378
11. 379
12. 380
13. 381
  1. 382
  2. 383
  3. 384
  4. 385
  5. 386
  6. 387
    1. 388
389
1. 390
2. 391
  1. 392
  2. 393
  3. 394
  4. 395
  5. 396
  6. 397
  7. 398
  8. 399
  9. 400
  10. 401
  11. 402
  12. 403
  13. 404
  14. 405
  15. 406
  16. 407
3. 408
  1. 409
  2. 410
  3. 411
  4. 412
4. 413
  1. 414
  2. 415
  3. 416
  4. 417
  5. 418
  6. 419
  7. 420
421
1. 422
2. 423
424
1. 425
2. 426
  1. 427
    1. 428
  2. 429
    1. 430
  3. 431
    1. 432
  4. 433
    1. 434
  5. 435
    1. 436
  6. 437
    1. 438
  7. 439
    1. 440
441
1. 442
  1. 443
2. 444
  1. 445
  2. 446
  3. 447
  4. 448
  5. 449
  6. 450
451
1. 452
453
1. 454

2.4.1 Uninitialized Sections

Uninitialized sections reserve space in MSP430 memory; they are usually placed in RAM. These sections have no actual contents in the object file; they simply reserve memory. A program can use this space at run time for creating and storing variables.

Uninitialized data areas are built by using the following assembler directives.

The .bss directive reserves space in the .bss section.
The .usect directive reserves space in a specific uninitialized user-named section.

Each time you invoke the .bss or .usect directive, the assembler reserves additional space in the .bss or the user-named section. The syntax is:

	.bss symbol,size in bytes[, alignment ]
symbol	.usect "section name",size in bytes[, alignment ]

symbol	points to the first byte reserved by this invocation of the .bss or .usect directive. The symbol corresponds to the name of the variable for which you are reserving space. It can be referenced by any other section and can also be declared as a global symbol (with the .global directive).
size in bytes	is an absolute expression (see Section 4.9). The .bss directive reserves size in bytes bytes in the .bss section. You must specify a size; there is no default value. The .usect directive reserves size in bytes bytes in section name. You must specify a size; there is no default value.
alignment	is an optional parameter. It specifies the minimum alignment in bytes required by the space allocated. The default value is byte aligned; this option is represented by the value 1. The value must be a power of 2. The maximum alignment is 32K.
section name	specifies the user-named section in which to reserve space. See Section 2.4.3.

Initialized section directives (.text, .data, .intvec, and .sect) change which section is considered the current section (see Section 2.4.4). However, the .bss and .usect directives do not change the current section; they simply escape from the current section temporarily. Immediately after a .bss or .usect directive, the assembler resumes assembling into whatever the current section was before the directive. The .bss and .usect directives can appear anywhere in an initialized section without affecting its contents. For an example, see Section 2.4.7.

The .usect directive can also be used to create uninitialized subsections. See Section 2.4.6 for more information on creating subsections.

The .common directive is similar to directives that create uninitialized data sections, except that common symbols are created by the linker instead.