📄 main.lst
字号:
355 Calculates the CRC32 by looping through each of the bytes in sData.
356
357 Note: For Example usage example, see FileCRC().
358 */
\ In section .text, align 4, keep-with-next
359 void PartialCRC(unsigned long* ulCRC, const unsigned char *sData,unsigned long ulDataLength)
360 {
\ PartialCRC:
\ 00000000 01402DE9 PUSH {R0,LR}
\ 00000004 000052E3 CMP R2,#+0
\ 00000008 0A00000A BEQ ??PartialCRC_0
\ ??PartialCRC_1:
\ 0000000C 012042E2 SUB R2,R2,#+1
361 while(ulDataLength--)
362 {
363 *ulCRC = ((*ulCRC) >>8)
364 ^crc32_table[((*ulCRC)&0xFF)^*sData++];
\ 00000010 003090E5 LDR R3,[R0, #+0]
\ 00000014 FFC003E2 AND R12,R3,#0xFF
\ 00000018 01E0D1E4 LDRB LR,[R1], #+1
\ 0000001C 0CC02EE0 EOR R12,LR,R12
\ 00000020 ........ LDR LR,??DataTable14 ;; crc32_table
\ 00000024 0CC19EE7 LDR R12,[LR, +R12, LSL #+2]
\ 00000028 23342CE0 EOR R3,R12,R3, LSR #+8
\ 0000002C 003080E5 STR R3,[R0, #+0]
365 }
\ 00000030 000052E3 CMP R2,#+0
\ 00000034 F4FFFF1A BNE ??PartialCRC_1
366 }
\ ??PartialCRC_0:
\ 00000038 0050BDE8 POP {R12,LR}
\ 0000003C 1EFF2FE1 BX LR ;; return
367
368 /*
369 Reflection is a requirement for the official CRC-32 standard.
370 You can create CRCs without it, but they won't conform to the standard.
371 */
372
\ In section .text, align 4, keep-with-next
373 unsigned long Reflect(unsigned long ulReflect, const char cChar)
374 {
\ Reflect:
\ 00000000 01402DE9 PUSH {R0,LR}
375 unsigned long ulValue = 0;
\ 00000004 0020A0E3 MOV R2,#+0
376 int iPos;
377 for(iPos = 1; iPos < (cChar +1); iPos ++)
\ 00000008 0130A0E3 MOV R3,#+1
\ 0000000C 01C081E2 ADD R12,R1,#+1
\ 00000010 0CC8A0E1 MOV R12,R12, LSL #+16
\ 00000014 2CC8A0E1 MOV R12,R12, LSR #+16
\ 00000018 02005CE3 CMP R12,#+2
\ 0000001C 0800003A BCC ??Reflect_0
378 {
379 if(ulReflect &1)
\ ??Reflect_1:
\ 00000020 010010E3 TST R0,#0x1
380 {
381 ulValue |=(1 << (cChar-iPos));
\ 00000024 01C0A013 MOVNE R12,#+1
\ 00000028 03E04110 SUBNE LR,R1,R3
\ 0000002C 1C2E8211 ORRNE R2,R2,R12, LSL LR
382 }
383 ulReflect >>= 1;
\ 00000030 A000A0E1 LSR R0,R0,#+1
384 }
\ 00000034 013083E2 ADD R3,R3,#+1
\ 00000038 01C081E2 ADD R12,R1,#+1
\ 0000003C 0C0053E1 CMP R3,R12
\ 00000040 F6FFFFBA BLT ??Reflect_1
385 return ulValue;
\ ??Reflect_0:
\ 00000044 0200A0E1 MOV R0,R2
\ 00000048 0050BDE8 POP {R12,LR}
\ 0000004C 1EFF2FE1 BX LR ;; return
386 }
387 /*
388 This function initializes "CRC Lookup Table". You only need to call it once to
389 initalize the table before using any of the other CRC32 calculation functions.
390 */
\ In section .text, align 4, keep-with-next
391 void InitializeCRC(void)
392 {
\ InitializeCRC:
\ 00000000 31402DE9 PUSH {R0,R4,R5,LR}
393 unsigned long ulPolynomial = 0x04C11DB7;
394 int iCodes;
395 int iPos;
396 for(iCodes =0; iCodes<=0xFF; iCodes++)
\ 00000004 0040A0E3 MOV R4,#+0
\ 00000008 ........ LDR R5,??DataTable14 ;; crc32_table
397 {
398 crc32_table[iCodes] = Reflect(iCodes,8) << 24;
\ ??InitializeCRC_0:
\ 0000000C 0810A0E3 MOV R1,#+8
\ 00000010 0400A0E1 MOV R0,R4
\ 00000014 ........ BL Reflect
\ 00000018 000CA0E1 LSL R0,R0,#+24
\ 0000001C 000085E5 STR R0,[R5, #+0]
399 for(iPos =0; iPos<8;iPos++)
\ 00000020 0800A0E3 MOV R0,#+8
400 {
401 crc32_table[iCodes] = (crc32_table[iCodes] << 1)
402 ^((crc32_table[iCodes] & (unsigned long)(1 << 31))?ulPolynomial:0);
\ ??InitializeCRC_1:
\ 00000024 001095E5 LDR R1,[R5, #+0]
\ 00000028 800411E3 TST R1,#0x80000000
\ 0000002C 38109F15 LDRNE R1,??InitializeCRC_2 ;; 0x4c11db7
\ 00000030 0010A003 MOVEQ R1,#+0
\ 00000034 002095E5 LDR R2,[R5, #+0]
\ 00000038 821021E0 EOR R1,R1,R2, LSL #+1
\ 0000003C 001085E5 STR R1,[R5, #+0]
403 }
\ 00000040 010050E2 SUBS R0,R0,#+1
\ 00000044 F6FFFF1A BNE ??InitializeCRC_1
404 crc32_table[iCodes] = Reflect(crc32_table[iCodes],32);
\ 00000048 2010A0E3 MOV R1,#+32
\ 0000004C 000095E5 LDR R0,[R5, #+0]
\ 00000050 ........ BL Reflect
\ 00000054 040085E4 STR R0,[R5], #+4
405 }
\ 00000058 014084E2 ADD R4,R4,#+1
\ 0000005C 400F54E3 CMP R4,#+256
\ 00000060 E9FFFFBA BLT ??InitializeCRC_0
406 }
\ 00000064 3840BDE8 POP {R3-R5,LR}
\ 00000068 1EFF2FE1 BX LR ;; return
\ ??InitializeCRC_2:
\ 0000006C B71DC104 DC32 0x4c11db7
407
408 /*
409 Returns the calculated CRC32 (through ulOutCRC) for the given string.
410 */
\ In section .text, align 4, keep-with-next
411 unsigned long FullCRC(const unsigned char *sData, unsigned long ulDataLength)
412 {
\ FullCRC:
\ 00000000 01402DE9 PUSH {R0,LR}
413 unsigned long ulCRC = 0xffffffff; //Initilaize the CRC.
\ 00000004 0030E0E3 MVN R3,#+0
\ 00000008 00308DE5 STR R3,[SP, #+0]
414 PartialCRC(&ulCRC, sData, ulDataLength);
\ 0000000C 0120A0E1 MOV R2,R1
\ 00000010 0010A0E1 MOV R1,R0
\ 00000014 0D00A0E1 MOV R0,SP
\ 00000018 ........ BL PartialCRC
415 return ulCRC ;
\ 0000001C 00009DE5 LDR R0,[SP, #+0]
\ 00000020 0050BDE8 POP {R12,LR}
\ 00000024 1EFF2FE1 BX LR ;; return
416 //Finalize the CRC and return.
417 }
418
419 //------------------------------------------------------------------------------
420 // The function to test whether the dataflash has datas
421 //if the dataflash is empty return a value, or return 0.
422 //------------------------------------------------------------------------------
\ In section .text, align 4, keep-with-next
423 static unsigned int WhetherEmpty()
424 {
\ WhetherEmpty:
\ 00000000 70402DE9 PUSH {R4-R6,LR}
425 unsigned int i,j;
426 unsigned char *tmp;
427 tmp = SdCodeAddr;
\ 00000004 ........ LDR R0,??DataTable39 ;; SdCodeAddr
\ 00000008 004090E5 LDR R4,[R0, #+0]
428 for(i = 0; i < 16; i++)
\ 0000000C 0050A0E3 MOV R5,#+0
\ 00000010 0160A0E3 MOV R6,#+1
\ 00000014 050000EA B ??WhetherEmpty_0
429 {
430 if(*tmp == 0xFF)
431 {
432 j =1;
433 tmp++;
\ ??WhetherEmpty_1:
\ 00000018 014084E2 ADD R4,R4,#+1
434 TRACE_INFO("NO data\n\r");
\ 0000001C 40009FE5 LDR R0,??WhetherEmpty_2 ;; `?<Constant "-I- NO data\\n\\r">`
\ 00000020 ........ BL printf
435 }
\ 00000024 015085E2 ADD R5,R5,#+1
\ 00000028 100055E3 CMP R5,#+16
\ 0000002C 0900002A BCS ??WhetherEmpty_3
\ ??WhetherEmpty_0:
\ 00000030 0000D4E5 LDRB R0,[R4, #+0]
\ 00000034 FF0050E3 CMP R0,#+255
\ 00000038 F6FFFF0A BEQ ??WhetherEmpty_1
436 else
437 {
438
439 j=0;
\ 0000003C 0060A0E3 MOV R6,#+0
440 TRACE_INFO("data:%x, %x\n\r",*tmp,tmp);
\ 00000040 0420A0E1 MOV R2,R4
\ 00000044 0010A0E1 MOV R1,R0
\ 00000048 18009FE5 LDR R0,??WhetherEmpty_2+0x4 ;; `?<Constant "-I- data:%x, %x\\n\\r">`
\ 0000004C ........ BL printf
441 TRACE_INFO(" has datas\n\r");
\ 00000050 14009FE5 LDR R0,??WhetherEmpty_2+0x8 ;; `?<Constant "-I- has datas\\n\\r">`
\ 00000054 ........ BL printf
442 tmp++;
443 break;
444 }
445 }
446 return j;
\ ??WhetherEmpty_3:
\ 00000058 0600A0E1 MOV R0,R6
\ 0000005C 7040BDE8 POP {R4-R6,LR}
\ 00000060 1EFF2FE1 BX LR ;; return
\ ??WhetherEmpty_2:
\ 00000064 ........ DC32 `?<Constant "-I- NO data\\n\\r">`
\ 00000068 ........ DC32 `?<Constant "-I- data:%x, %x\\n\\r">`
\ 0000006C ........ DC32 `?<Constant "-I- has datas\\n\\r">`
447
448 }
449 //------------------------------------------------------------------------------
450 /// LeadApp() function was used to copy the code in dataflash to sdram
451 //------------------------------------------------------------------------------
452
\ In section .text, align 4, keep-with-next
453 static unsigned int LeadAPP(void)
454 {
\ LeadAPP:
⌨️ 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 + -