📄 hpi32.lst
字号:
223 1 ThisFile.pointer=0;
224 1
225 1 Response.len=32;
226 1 return TRUE;
227 1 }
228
229
230 unsigned char ReadFile32(unsigned long readLength,unsigned char *pBuffer)
231 {
232 1
233 1 unsigned int len,i;
234 1 unsigned int tlen;
235 1 unsigned long blen;
236 1
237 1 if(!bFlags.bits.SLAVE_IS_ATTACHED)
238 1 return FALSE;
239 1 if(!ThisFile.bFileOpen)
240 1 return FALSE;
241 1
C51 COMPILER V7.00 HPI32 02/15/2008 12:14:59 PAGE 5
242 1 blen=readLength;
243 1 tlen=0;
244 1 if(readLength>MAX_READ_LENGTH)
245 1 return FALSE;
246 1
247 1 if(readLength+ThisFile.pointer>ThisFile.LengthInByte)
248 1 return FALSE;
249 1
250 1 ////////////////////////////////////////////
251 1 while(readLength>0)
252 1 {
253 2 if(ThisFile.SectorofCluster>=DeviceInfo.BPB_SecPerClus)
254 2 {
255 3 ThisFile.SectorofCluster=0;
256 3 ThisFile.ClusterPointer=GetNextClusterNum32(ThisFile.ClusterPointer);
257 3 if(ThisFile.ClusterPointer>DeviceInfo.TotCluster)
258 3 return FALSE;
259 3 ThisFile.SectorPointer=FirstSectorofCluster32(ThisFile.ClusterPointer);
260 3 }
261 2
262 2 if(readLength+ThisFile.OffsetofSector>DeviceInfo.BPB_BytesPerSec)
263 2 len=DeviceInfo.BPB_BytesPerSec;
264 2 else
265 2 len=readLength+ThisFile.OffsetofSector;
266 2
267 2 //////////////////////////////////////////////////////
268 2 if(ThisFile.OffsetofSector>0)
269 2 {
270 3 if(SdReadSector(ThisFile.SectorPointer,1,DBUF))
271 3 {
272 4
273 4 len=len-ThisFile.OffsetofSector;
274 4 for(i=0;i<len;i++)
275 4
276 4 *(pBuffer+i)=DBUF[ThisFile.OffsetofSector+i];
277 4 ThisFile.OffsetofSector=ThisFile.OffsetofSector+len;
278 4 }
279 3 else
280 3 return FALSE;
281 3 }
282 2 else
283 2 {
284 3 if(!SdReadSector(ThisFile.SectorPointer,1,pBuffer+tlen))
285 3 return FALSE;
286 3 ThisFile.OffsetofSector=len;
287 3 }
288 2 ////////////////////////////////////////////////////////////
289 2 readLength-=len;
290 2 tlen+=len;
291 2
292 2 /////////////////////////////////////////////////////////
293 2 if(ThisFile.OffsetofSector>=DeviceInfo.BPB_BytesPerSec)
294 2 {
295 3 ThisFile.OffsetofSector-=DeviceInfo.BPB_BytesPerSec;
296 3 ThisFile.SectorofCluster+=1;
297 3
298 3 ThisFile.SectorPointer+=1;
299 3 }
300 2 //////////////////////////////////////////////////////////////////
301 2 }//end while
302 1
303 1 ThisFile.bFileOpen=1;
C51 COMPILER V7.00 HPI32 02/15/2008 12:14:59 PAGE 6
304 1 ThisFile.pointer+=tlen;
305 1 //////////////////////////////////////////////
306 1 Response.len=blen;
307 1
308 1 return TRUE;
309 1 }
310
311 unsigned char SetFilePointer32(unsigned long pointer)
312 {
313 1 if(!bFlags.bits.SLAVE_IS_ATTACHED)
314 1 return FALSE;
315 1 if(!ThisFile.bFileOpen)
316 1 return FALSE;
317 1 ///////////////////////////////////////////////////////////
318 1 ThisFile.pointer=pointer;
319 1 if(ThisFile.pointer>ThisFile.LengthInByte)
320 1 return FALSE;
321 1
322 1 if(!GoToPointer32(ThisFile.pointer))
323 1 {
324 2 ThisFile.bFileOpen=0;
325 2 return FALSE;
326 2 }
327 1 //////////////////////////////////////////////
328 1 return TRUE;
329 1 }
330
331 unsigned char CreateFile32(unsigned long len,unsigned char *pBuffer,unsigned char *pName)
332 {
333 1 unsigned int sector,i,j,DirCount;
334 1 unsigned int xdata InByte;
335 1 unsigned long cnum;
336 1 unsigned char xdata bstop,bwrite;
337 1 unsigned long ClusterPointer;
338 1
339 1 if(!bFlags.bits.SLAVE_IS_ATTACHED)
340 1 return FALSE;
341 1 if((len%32)!=0)
342 1 return FALSE;
343 1 if((len+32)>DeviceInfo.BPB_BytesPerSec)
344 1 return FALSE;
345 1
346 1 ThisFile.bFileOpen=0;
347 1
348 1 cnum=GetFreeCusterNum32();
349 1 if(cnum<0x02)
350 1 return FALSE;
351 1
352 1 pBuffer[21]=(unsigned char)(cnum>>24);
353 1 pBuffer[20]=(unsigned char)(cnum>>16);
354 1 pBuffer[27]=(unsigned char)(cnum>>8);
355 1 pBuffer[26]=(unsigned char)(cnum);
356 1
357 1 pBuffer[28]=0;pBuffer[29]=0;pBuffer[30]=0;pBuffer[31]=0;
358 1 bstop=0;
359 1
360 1 NowCluster32=DirStartCluster32;
361 1 do
362 1 {
363 2 NowSector=FirstSectorofCluster32(NowCluster32);
364 2 ClusterPointer=NowCluster32;
365 2 for(sector=0;sector<DeviceInfo.BPB_SecPerClus;sector++)
C51 COMPILER V7.00 HPI32 02/15/2008 12:14:59 PAGE 7
366 2 {
367 3 if(!SdReadSector(NowSector+sector,1,DBUF))
368 3 return FALSE;
369 3 DirCount=0;bwrite=0;
370 3
371 3 for(i=0;i<DeviceInfo.BPB_BytesPerSec;i=i+32)
372 3 {
373 4 if(len==0)
374 4 {
375 5 if((DBUF[i]==0x00)||(DBUF[i]==0xE5))
376 5 {
377 6 for(j=0;j<32;j++)
378 6 DBUF[i+j]=*(pBuffer+j);
379 6 if(!SdWriteSector(NowSector+sector,1,DBUF))
380 6 return FALSE;
381 6 bstop=1;
382 6 break;
383 6 }
384 5 }
385 4 else
386 4 {
387 5 if(DirCount==0)
388 5 InByte=i;
389 5 if(DBUF[i]==0xE5)
390 5 DirCount++;
391 5 else if(DBUF[i]==0x00)
392 5 {
393 6 DirCount++;
394 6 DBUF[i]=0xE5;
395 6 bwrite=1;
396 6 }
397 5 else
398 5 DirCount=0;
399 5
400 5 if((DirCount*32)>=(len+32))
401 5 {
402 6 for(j=0;j<len;j++)
403 6 DBUF[InByte+j]=*(pName+j);
404 6 for(j=0;j<32;j++)
405 6 DBUF[InByte+len+j]=*(pBuffer+j);
406 6 if(!SdWriteSector(NowSector+sector,1,DBUF))
407 6 return FALSE;
408 6 bstop=1;
409 6 break;
410 6 }
411 5 }
412 4 }
413 3 if(bstop==1)break;
414 3
415 3 if((len!=0)&&(bwrite==1))
416 3 {
417 4 if(!SdWriteSector(NowSector+sector,1,DBUF))
418 4 return FALSE;
419 4 }
420 3 }
421 2 if(bstop==1)break;
422 2
423 2 NowCluster32=GetNextClusterNum32(NowCluster32);
424 2 if(NowCluster32>DeviceInfo.TotCluster)
425 2 {
426 3 NowCluster32=CreateClusterLink32(ClusterPointer);
427 3 if(NowCluster32==0x00)
C51 COMPILER V7.00 HPI32 02/15/2008 12:14:59 PAGE 8
428 3 return FALSE;
429 3 NowSector=FirstSectorofCluster32(NowCluster32);
430 3 for(i=0;i<DeviceInfo.BPB_BytesPerSec;i++) DBUF[i]=0x00;
431 3 for(sector=0;sector<DeviceInfo.BPB_SecPerClus;sector++)
432 3 {
433 4 if(!SdWriteSector(NowSector+sector,1,DBUF))
434 4 return FALSE;
435 4 }
436 3 }
437 2 }while(NowCluster32<=DeviceInfo.TotCluster);
438 1 ////////////////////////////////////////////////////////////////
439 1
440 1 ThisFile.StartCluster=cnum;
441 1 ThisFile.LengthInByte=0;
442 1 ThisFile.ClusterPointer=ThisFile.StartCluster;
443 1 ThisFile.SectorPointer=FirstSectorofCluster32(ThisFile.StartCluster);
444 1 ThisFile.OffsetofSector=0;
445 1 ThisFile.SectorofCluster=0;
446 1 ThisFile.bFileOpen=1;
447 1 ThisFile.pointer=0;
448 1 ThisFile.FatSectorPointer=0;
449 1
450 1 return TRUE;
451 1 }
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -