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ie8及以上

【经验分享】STM32 CRC32 ( Delphi )

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STMCU小助手 发布时间：2022-1-23 16:06
  1. /*
    / X% F  [! u5 D: J- j$ F

  2. 9 [8 E7 S0 t' M8 i
  3. The CRC calculation unit mainly consists of a single 32-bit data register, which:7 o1 ^5 o; }6 q% B
  4. is used as an input register to enter new data in the CRC calculator
    6 ~! }: A2 ]- {: j, g% k
  5. (when writing into the register) holds the result of the previous CRC calculation: l3 U! `6 T, y* F9 z# M" e
  6. (when reading the register): a1 P& x9 C- L
  7. - k6 j$ X% b7 A8 q
  8. Each write operation into the data register creates a combination of
    2 J# H; b4 a/ `- x" H
  9. the previous CRC value and the new one. o4 Z- t; N, s
  10. (CRC computation is done on the whole 32-bit data word, and not byte per byte).1 n) n6 z7 G2 g% u- I: m4 Y
  11. & l  U; c- _$ G* J
  12. The CPU is stalled during the computation, thus allowing back-to-back write accesses or
    / o) I' [0 j; r% P5 z5 V0 D  r
  13. consecutive write and read accesses, without having to insert software wait cycles.; [- ?5 Y& R% y, p1 o: M8 V
  14. The CRC calculator can be reset to FFFF FFFFh with the RESET control bit in the CRC_CR register.
    $ R5 z+ y4 `$ ]- Y* m4 e0 N8 [
  15. This operation does not affect the contents of the CRC_IDR register# F& I7 H# f* r1 f) \, {
  16. POLY_USED_IN_STM32     0x04C11DB7
    . D1 j  A8 T0 X, d" l' Y" l
  17. #define CRC_INITIALVALUE     0xFFFFFFFF
    6 @1 O. C# f% z3 V
  18. 1. RCC_AHBPeriphClockCmd(RCC_AHBPeriph_CRC, ENABLE); /* Enable CRC clock */
    ; L8 Z! C# `9 Y/ G
  19. 2.& ?( C8 x. O. n$ i
  20. // 00 01 02 03          --> 0x03020100
    4 p3 R1 I0 ~) w' C- U
  21. // 00 01 02 03 04       --> 0x03020100, 0x04000000
      b  Q2 H# I3 A  y
  22. // 00 01 02 03 04 05    --> 0x03020100, 0x05040000& n* B6 [( U- o
  23. // 00 01 02 03 04 05 06 --> 0x03020100, 0x06050400
    * X# F3 K3 w# b# ^( E
  24. //
    4 b' p6 I$ d* U5 {# z+ M
  25. uint32_t stm32_hw_crc32(uint32_t crc32, uint8_t pBuffer[], uint32_t NumOfByte)! m4 h- O9 I6 r3 ]' ?( \9 D* Q) Z; i
  26. {2 l6 m$ h* X, f5 }- {8 e
  27.   uint32_t last_data;
    1 S- w1 t5 [# ?
  28.   uint32_t NumOfDWord = NumOfByte>>2;" D% p, D9 D) x5 X
  29.   uint32_t NumOfTailByte =  NumOfByte & 3 ;
    3 j) T4 T+ t: a! ]

  30. 0 ~6 x# |$ c8 F! ?4 E+ I- L
  31.   CRC_ResetDR();+ S5 a0 g( `$ d
  32.   crc32 = CRC_CalcBlockCRC( (uint32_t  *)pBuffer, NumOfDWord );+ L8 ?2 v( ~' G5 f7 K9 N+ q
  33. 4 f5 ?4 Y- b& _7 p5 K
  34.   switch ( NumOfTailByte ). r+ C% j" K" x% [0 f
  35.   {9 z' a7 n! g% n; |' W' i! \9 x) m
  36.     case 0:- z* c+ s4 U6 E0 T2 z3 D" Y# z
  37.       return crc32;# V. }3 Z9 P# C8 N, Y* f1 p' K; H
  38.     case 1:# k+ s; i$ H  h' f
  39.       last_data = pBuffer[NumOfByte-1] << 24;. V( ?/ Z- I) C! g( }5 H' L
  40.       break;% n! a; c, B1 J
  41.     case 2:
    * p0 ^' U, H3 L
  42.       last_data = *( (uint16_t *)(&pBuffer[NumOfByte-2]) );6 @) L0 m- C; ]2 F! i$ b9 j
  43.       last_data <<= 16;; F; L7 G; U# L, W9 [
  44.       break;$ ]/ r6 y7 u1 \& o, J& H" O$ e
  45.     case 3:5 e0 z1 A2 m8 Y5 t( M7 J9 e* Y1 [) b5 E
  46.       last_data = *( (uint16_t *)(&pBuffer[NumOfByte-3]) );
    / `7 O! d& R& b* i
  47.       last_data <<= 8;
    8 q2 L: M) n) X
  48.       last_data += pBuffer[NumOfByte-1]<<24;
    # ^2 k6 E( S. r! X, c5 O
  49.       break;& h% i* G( W% N. e7 f
  50.   }6 ~- ?  I6 K2 X: q5 t( w
  51.   return CRC_CalcCRC( last_data );  q2 M1 z9 |% }
  52. }
    . s6 y8 V6 H0 Z8 D

  53. : g2 D) W4 n# U

  54. ( R" q- e4 ~6 K3 r: _. d
  55. 6 B- U3 p% \# Y; D; v
  56. uint32_t stm32_sw_crc32_by_bit(uint32_t crc32, uint8_t pBuffer[], uint32_t NumOfByte) . I5 f! a; _' H  a' \$ o7 S7 g
  57. {4 {6 a1 }$ Q: q0 y& Z( g& F' t2 o
  58.   uint32_t last_data;7 H2 C0 u, n  g# \, P
  59.   uint32_t NumOfDWord = NumOfByte>>2;
    + S5 }3 M3 N+ h( _3 _7 q# h3 o
  60.   uint32_t NumOfTailByte =  NumOfByte & 3 ;
    5 k" h6 \) W8 y7 W% G
  61.   / W4 c0 |- P  h7 T2 b0 j+ G+ j
  62.   while(NumOfDWord--)
    & i2 k4 G4 {6 J9 Z
  63.   {
    & s8 ~' o  {' p, L. H+ o
  64.     crc32 = crc32 ^ *((unsigned long *)pBuffer);% ?5 _7 }. G: ?
  65.     pBuffer += 4;
    ; @( D1 V  ^- D  V' }. k

  66. - W4 f6 @) V6 {$ }  ]! B
  67.     for(int i=0; i<32; i++)2 X' D) C! O. L. e* q7 ^
  68.     {
    4 l) q5 o! b1 y1 i! f" V* g. U
  69.       if (crc32 & 0x80000000)
    * F& k* q0 Q/ n  I- h( ?( d0 i
  70.         crc32 = (crc32 << 1) ^ POLY_USED_IN_STM32;
    " U/ ?) g( D7 w. ^, f3 R+ Q
  71.       else
    ( a( t* y" b1 |! k  A, a2 U
  72.         crc32 = (crc32 << 1);
    2 m% u& k. \; v+ y: e  |  g. g
  73.     }
    * p3 _4 |5 z( W3 X
  74.   }
    ! K- G8 E: V" L: {) ]
  75.   ! B/ s7 C* G; @) |' y
  76.   switch ( NumOfTailByte ): j' O- n( S( k$ x2 v
  77.   {$ A( C  M+ M5 B
  78.     case 0:% @' ~/ x7 ], X( ?
  79.       return crc32;     
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  80.     case 1:5 y  j* P+ n* F, j( L
  81.       last_data = pBuffer[0] << 24;
    6 T+ p% i  w6 `# o/ u( O! `
  82.       break;
    * o# \; F2 T  H7 r
  83.     case 2:
    " c- v( r2 V$ c4 z7 @
  84.       last_data = *( (uint16_t *)(&pBuffer[0]) );2 I0 G; M4 j' F9 o
  85.       last_data <<= 16;. w* d2 n. S8 \2 @
  86.       
    / q. X: c3 Q- [, S
  87.       break;. l1 T; B  c# G5 P
  88.     case 3:
    , n& F0 x5 ^  s0 K1 I" I1 O/ A
  89.       last_data = *( (uint16_t *)(&pBuffer[0]) );
    # e% t4 h) a: e: f7 }
  90.       last_data <<= 8;+ x6 T, r9 o  q+ x+ {& \! x1 E
  91.       last_data += pBuffer[2]<<24;8 u$ ?; y* ?2 K. q
  92.       break;0 |4 U$ S1 {6 n% g" c& `
  93.   }/ X- W. h9 e- _- o$ y( c3 ]
  94.   crc32 = stm32_sw_crc32_by_bit( crc32, (uint8_t *)&last_data, 4);+ |4 F- K2 E+ b) _- F# W
  95.   return crc32;
    ( Y! ]" l; c4 L( X( b  B
  96. }
    2 z2 ]6 B( A' \" G* E
  97. + O6 N8 M- T. O# I3 b
  98. 3 `  w/ X) P( j. O# U: [5 m
  99. // Nibble lookup table for 0x04C11DB7 polynomial
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  100. const unsigned long sw_crc32_by_nibble_table[16] = {
    7 k( T# ^( F# i  @1 m( y2 K
  101.   0x00000000,0x04C11DB7,0x09823B6E,0x0D4326D9,
    " H' M9 t- p0 I/ a
  102.   0x130476DC,0x17C56B6B,0x1A864DB2,0x1E475005,0 o: X* U% v+ z+ Y0 J0 k# m+ x
  103.   0x2608EDB8,0x22C9F00F,0x2F8AD6D6,0x2B4BCB61,
    " s: g9 O4 n* T/ W2 v1 n
  104.   0x350C9B64,0x31CD86D3,0x3C8EA00A,0x384FBDBD
    / R, _5 f9 n+ g- [3 F( B& o* }( x
  105. };- V- M% e/ M$ J7 ~7 I  S9 M

  106. 7 M+ X  Y  M/ \2 _% p! O) a+ G
  107. uint32_t stm32_sw_crc32_by_nibble(uint32_t crc32, uint8_t pBuffer[], uint32_t NumOfByte)  / ~! I. V' y. I* R! _+ n
  108. {& n, J  t# F3 q$ T: h
  109.   uint32_t last_data;
    3 L1 F3 H+ x/ z2 H
  110.   uint32_t NumOfDWord = NumOfByte>>2;
    / e. y) U, s/ b* J/ G" j
  111.   uint32_t NumOfTailByte =  NumOfByte & 3 ;
    + O$ Y% ~$ c5 @" J
  112.   5 K4 ]( }/ p' j7 l4 R8 b( V' [% r
  113.   while(NumOfDWord--)2 x, `- M) C, q( }# j
  114.   {
    / }6 z  \# R- K' `! h( F# |
  115.     crc32 = crc32 ^ *((unsigned long *)pBuffer);
    ! J) b  ?% n5 {9 M6 ^
  116.     pBuffer += 4;
    ( J1 c0 R4 \" P5 R
  117.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];
    % A( O4 H3 C8 p- f% h( W
  118.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];- A% C9 {/ h2 D- v+ {
  119.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];
    " _* ^! ?% j& \- P% M3 K1 w
  120.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];+ a* d6 I4 o7 {5 \; y9 {( A
  121.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];
    8 b4 W8 f: B/ K7 S
  122.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];: H! [6 @) H5 Q' [$ w! w6 J# v7 Z
  123.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];
    2 \- W( l" [( Q. I: ?
  124.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];
    : u" j$ z2 p8 r4 `6 b4 E: I5 O
  125.   }
    + `, {. w' L: x1 ^; ^9 j( P+ d
  126.   / _4 o, r# o% B; t0 t  |) j
  127.   switch ( NumOfTailByte ). x+ K# `) |: V$ x
  128.   {. t+ y- z5 k2 a6 c& q3 y" K; r, R  W" i
  129.     case 0:7 o+ [0 }* X( F0 g+ @6 l  G( L$ y$ M
  130.       return crc32;     
    4 @! Y& F$ v9 A! h/ ^4 X
  131.     case 1:
    ; W! I, j1 M5 G& v& {3 g
  132.       last_data = pBuffer[0] << 24;( J, B' |/ i( T" ^% D
  133.       break;
    , z, x( n2 E' W; a% @7 Q% X
  134.     case 2:
    9 ]8 e" A* y9 c: `: i
  135.       last_data = *( (uint16_t *)(&pBuffer[0]) );) Q) X- D0 V1 q- ?! t' \
  136.       last_data <<= 16;  O2 h1 E6 @7 X" _* M) E
  137.       
    & _& Q: P/ r/ s) V; i0 j
  138.       break;
    ) _6 ]  x# ?6 H. v* Q$ L3 M
  139.     case 3:
    ( G7 [" U  R- ?' m% b8 {; P
  140.       last_data = *( (uint16_t *)(&pBuffer[0]) );
      B1 c- F$ r  b$ n+ |9 ^# b2 p% ^; p8 z
  141.       last_data <<= 8;1 \' x: \! W; f( T) y
  142.       last_data += pBuffer[2]<<24;
    . Z& I) c; L8 P$ ^
  143.       break;3 l! l0 Z, g- Q0 R4 E! B1 O
  144.   }
    3 O" d. j) H. r; d% r# E$ C
  145.   crc32 = stm32_sw_crc32_by_nibble( crc32, (uint8_t *)&last_data, 4);+ V! N* J  G; U: s4 O7 ^$ m
  146.   return crc32;$ p. G' X" f1 s6 v7 Q- T
  147. }; e8 e' g5 ], r
  148. , q( X& |. m/ K& R' _1 O7 f3 l( t
  149. unsigned long sw_crc32_by_byte_table[256] =
    . S* K: c3 b; D! T+ n
  150. {
    % x: t/ N, D8 a$ E
  151.   0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, // 0..3+ Q7 i4 N; x* b7 c' T
  152.   0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005, // 4..7) v4 y5 ?; d+ L# I% R
  153.   0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, // 8..B6 Z& `/ i% Y9 [7 R! b6 H3 ~
  154.   0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, // C..F6 B0 b% O, N& t, B( N; O& e: A
  155.   
    % ]4 C; [. f/ \' y6 ~6 J
  156.   0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,
    . h" M! t7 J: [) b, w
  157.   0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
    0 h. m. L4 c5 d1 n6 I* Y
  158.   0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011,
    ; l( G4 Z- {2 `* v
  159.   0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,# W4 l, B% [" o' Q
  160.   0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,& S: G) Y" H, Y3 j0 V- I2 T
  161.   0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
    4 f5 x5 B8 j, _  G% C0 S7 |+ \6 X
  162.   0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81,& I4 I3 _( ^4 ~8 M6 [
  163.   0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
    ) q3 B% x4 p# {% y# b
  164.   0xd4326d90, 0xd0f37027, 0**b056fe, 0xd9714b49,
    ' Z* d% c  r) }( {- O$ Q
  165.   0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
    1 W) y, E, ?0 G0 U
  166.   0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,3 v& @6 X! I- A) y
  167.   0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
    + |0 ]% q0 E7 F6 ~9 q/ h& |
  168.   0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae,
    ( f  D  ~+ u/ I4 y8 Y. k; Z% s
  169.   0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,+ p. ?  w4 I2 i! q3 Z
  170.   0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16,
    - K3 A; B. b9 P1 R9 p2 a) G
  171.   0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,) r9 J3 S) `- A& f( d7 \: D2 N5 A
  172.   0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,+ {% t' m7 J& t( T* L' N$ X: }" f" @* \
  173.   0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,/ K  E( e  I$ m% e; ]& c" o
  174.   0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066,
    + |" A5 b4 }" Q5 ]2 r4 l
  175.   0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
    + O( i, Q4 p; V0 z) x8 ~, F
  176.   0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e,. O1 F& g" }, L8 o! I
  177.   0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
    4 z$ m) x3 w+ f' z, B8 n* g8 B' @
  178.   0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
    $ D  }( M: \* M+ Y0 s3 E7 B7 x% l
  179.   0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,9 y! o" h# G6 a3 C+ r) J
  180.   0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e,  y1 ^- T2 u9 C3 ^; E7 w
  181.   0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,( g: ^: Y; X. S! V' O0 w& V. \
  182.   0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686,
    1 Y+ C$ w! h8 j$ W& D
  183.   0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,; O- }9 |* b( v  f
  184.   0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
    % f9 A/ g3 _# z% Z4 W) g. Z
  185.   0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,2 N/ S- W" w" y4 P2 L6 |
  186.   0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f,
    0 ]) n0 R3 B9 }4 a: J3 D6 A4 y
  187.   0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
    1 z- J) T! H, ]+ K# n# d+ b
  188.   0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47,/ m& R, c, O, r" I% B
  189.   0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
    ; C/ E/ K3 @. _' i5 U
  190.   0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,, n# n+ _* a' c: O& B" ~* C) f7 T
  191.   0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,/ n+ @5 M) j! `  i+ z
  192.   0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7,# b" R6 m6 a# E6 p: F
  193.   0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,: Q" n. F' ?2 w# h
  194.   0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f,
    : B2 i* ~1 N  m
  195.   0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,3 k) {2 r0 z  u( f1 A" r
  196.   0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
    3 [- S. ~9 o, \2 }, g. y4 _+ W
  197.   0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,$ N/ u. F( K$ E: s, ?$ l! p
  198.   0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f,. T7 E5 r! g; N
  199.   0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3," \2 B; f. x4 d( Q/ l
  200.   0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640,) N3 ?# Q1 o  P9 w; Z+ }6 I
  201.   0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,: H: m4 z/ |8 q* \. C  K
  202.   0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,+ ?; }: }% o- O. V- C7 |
  203.   0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
    & c4 ~9 K4 ^. y) n+ q6 L! E2 p  ~
  204.   0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30,
    ' n$ T, X3 B' f2 [
  205.   0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,! g& K/ k+ k4 H$ k% a+ R1 o0 M: h
  206.   0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088,% o; O" t' Z. m8 F) m5 x
  207.   0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
    ) |. u0 c. U0 ~% s0 }. a  S7 M- Z
  208.   0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
    " F8 I/ f) J' L4 z9 U
  209.   0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
    & ]" b& @: v+ O6 e0 `1 |
  210.   0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18,( W" W/ ]+ U/ Z9 A/ w! ]+ s
  211.   0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,4 f  R- g' _# _" S  ?" L, s! u- p
  212.   0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0,
    / H$ [- ~! k% q1 C7 E
  213.   0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,  S* e, O: c' z& K+ t; m. u7 c
  214.   0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
    " B' [+ E& U: h8 {7 o' k
  215.   0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
    # P- q, L% \. Q: g# ^6 P
  216. };
    & B/ O0 }7 k: X% W$ p' a8 ?" i* H
  217. uint32_t stm32_sw_crc32_by_byte(uint32_t crc32, uint8_t pBuffer[], uint32_t NumOfByte)  - l" p. r' l& U4 t# l% c
  218. {) P5 l: f2 {% L; `
  219.   uint32_t last_data;
    # `: W+ e% {4 J
  220.   uint32_t NumOfDWord = NumOfByte>>2;6 |0 \" z: }. c! @
  221.   uint32_t NumOfTailByte =  NumOfByte & 3 ;  V/ U( ?7 T9 L; P2 q# h4 G/ ~8 L
  222.   0 _6 U( z: r: m% i& b
  223.   while(NumOfDWord--)
    & M! {1 r, O% z) }2 v
  224.   {+ V9 K% m1 r0 B' A- L) X) X& w7 n
  225.     crc32 = crc32 ^ *((unsigned long *)pBuffer);! u+ B& Q; E; F
  226.     pBuffer += 4;
    . V& F% L! M; Y6 Q! H
  227.     crc32 = (crc32 << 8) ^ sw_crc32_by_byte_table[crc32 >> 24];6 N  L! E( |. [- m( K
  228.     crc32 = (crc32 << 8) ^ sw_crc32_by_byte_table[crc32 >> 24];
    ! A# _& Z0 q3 k% c2 D3 ^
  229.     crc32 = (crc32 << 8) ^ sw_crc32_by_byte_table[crc32 >> 24];8 X; U( V- b- I' [  y) P- w) F
  230.     crc32 = (crc32 << 8) ^ sw_crc32_by_byte_table[crc32 >> 24];
    : L: N0 a# n5 ]. ~2 Y+ {
  231.   }
    , m5 q. P- d0 J  {$ \* }, d2 H
  232.   
    8 q9 Z; O( D1 e6 a4 J
  233.   switch ( NumOfTailByte )3 }: R, L, P+ r$ B. f
  234.   {
    . S! g  W2 e! S0 H
  235.     case 0:
    ) A& w9 ]$ w; c! i, z& |4 U
  236.       return crc32;     
    2 p. |) o( ?* x$ h9 Y6 x
  237.     case 1:
    + B$ n) i) v6 u0 p; W
  238.       last_data = pBuffer[0] << 24;
    % m8 {" b1 E6 O, X5 c
  239.       break;2 J4 h& f0 T0 W' y* K
  240.     case 2:
    ; `( j/ B3 x4 `) i
  241.       last_data = *( (uint16_t *)(&pBuffer[0]) );5 o& K) D  t" W9 \* Q1 x0 [& Z
  242.       last_data <<= 16;* X9 T: x& o9 {. X: I( q! x
  243.       
    6 ]& K; \( s" B+ u. f
  244.       break;1 {5 `, o. T3 e9 i* ^2 G+ K
  245.     case 3:
    % G+ _2 E0 q7 E& B$ R% l
  246.       last_data = *( (uint16_t *)(&pBuffer[0]) );
    ; E# M" e% R3 d2 u# d
  247.       last_data <<= 8;
    8 l) _; y5 X8 Z/ ~. L" f: L8 R
  248.       last_data += pBuffer[2]<<24;+ b, s5 F5 ~2 w5 d' Y9 ~
  249.       break;6 v( v! ?. O% Y& D7 X3 q  H
  250.   }
    3 U4 ]* `  Y1 o* D
  251.   crc32 = stm32_sw_crc32_by_byte( crc32, (uint8_t *)&last_data, 4);
    - S3 G9 F9 @# _- t7 ~' l
  252.   return crc32;
    " ]' e! c$ d2 b4 ]7 B
  253. }
复制代码
  1. unit uCRC32;5 |4 D3 I& h9 W$ M! j% R
  2. interface" m7 _4 |4 @$ k9 n. m2 _! J3 `
  3. uses1 D) p! v! A3 I: v8 W! H% l
  4.   Windows;- L5 R- {3 y9 D2 J2 ?
  5.   function stm32_sw_crc32_by_byte(crc32 : DWORD;( f" k6 u3 K$ i! L0 s
  6.     pBuffer : pbyte; NumOfByte : DWORD) : DWORD;# J2 B9 C7 F) ]" Y. j6 ?$ R) V
  7.   function uCrc32_Demo : DWORD;) m/ P+ g0 z& ]( T8 M9 u$ c5 H0 i6 @
  8. implementation
    9 H, p  R; U. [6 i9 g- M
  9. const2 q6 d( T: k( i( X
  10.   sw_crc32_by_byte_table : array[0..255] of DWORD =
    ! x; t3 D$ m1 ^& @3 y. j
  11.   (. J0 f5 Z; t' l0 _: Q
  12.   $00000000, $04c11db7, $09823b6e, $0d4326d9,    // 0..3
    * ^. R& ^1 b8 I# h6 t9 v
  13.   $130476dc, $17c56b6b, $1a864db2, $1e475005,    // 4..7+ g' o# }1 Z- Y) n- `' N
  14.   $2608edb8, $22c9f00f, $2f8ad6d6, $2b4bcb61,    // 8..B+ y. O: J7 s$ o
  15.   $350c9b64, $31cd86d3, $3c8ea00a, $384fbdbd,    // C..F
    ' U: g# ?+ Y  D! j1 Y% t
  16.   $4c11db70, $48d0c6c7, $4593e01e, $4152fda9,+ @* E' D! g$ o6 V
  17.   $5f15adac, $5bd4b01b, $569796c2, $52568b75,6 e" _0 p( s+ o' |
  18.   $6a1936c8, $6ed82b7f, $639b0da6, $675a1011,) J3 A9 J+ z: T& T5 {
  19.   $791d4014, $7ddc5da3, $709f7b7a, $745e66cd,. ~  Z2 @/ X+ ^% l
  20.   $9823b6e0, $9ce2ab57, $91a18d8e, $95609039,0 Y! s+ b, [# {6 Q
  21.   $8b27c03c, $8fe6dd8b, $82a5fb52, $8664e6e5,
    3 f+ W5 \$ e$ c. \# B' p
  22.   $be2b5b58, $baea46ef, $b7a96036, $b3687d81,
    4 T; z5 x6 K& P# Z8 y- W
  23.   $ad2f2d84, $a9ee3033, $a4ad16ea, $a06c0b5d,9 Y; G; Y4 |3 d" v( ^$ B" Q0 Q
  24.   $d4326d90, $d0f37027, $ddb056fe, $d9714b49,* q/ n% d2 t- m; G3 t
  25.   $c7361b4c, $c3f706fb, $ceb42022, $ca753d95,  S6 Y9 z# x. u; j
  26.   $f23a8028, $f6fb9d9f, $fbb8bb46, $ff79a6f1,  D" y* e+ J# V$ ?- G1 `5 M
  27.   $e13ef6f4, $e5ffeb43, $e8bccd9a, $ec7dd02d,
    1 N0 k  [" B5 y3 L1 u# T8 D( t3 O
  28.   $34867077, $30476dc0, $3d044b19, $39c556ae,
    + Y( E& H! W! M/ v) F* B1 b9 [6 C
  29.   $278206ab, $23431b1c, $2e003dc5, $2ac12072,
    7 x* x* _  {' j, l' i
  30.   $128e9dcf, $164f8078, $1b0ca6a1, $1fcdbb16,
    . j( T. Z6 v* s7 s; Y% C
  31.   $018aeb13, $054bf6a4, $0808d07d, $0cc9cdca,
    4 r% n% E& D; M9 H( J& W1 H
  32.   $7897ab07, $7c56b6b0, $71159069, $75d48dde,- H( u6 |- {* l+ e# G6 z
  33.   $6b93dddb, $6f52c06c, $6211e6b5, $66d0fb02,+ Z# T  y0 w+ @% H+ u
  34.   $5e9f46bf, $5a5e5b08, $571d7dd1, $53dc6066,; Y# j9 @! Q8 X- ]) R
  35.   $4d9b3063, $495a2dd4, $44190b0d, $40d816ba,
    1 x! b7 N6 \9 U* Q2 [+ q( |3 e
  36.   $aca5c697, $a864db20, $a527fdf9, $a1e6e04e,7 I5 Z  e! \* J7 w/ S; j. i2 g8 }
  37.   $bfa1b04b, $bb60adfc, $b6238b25, $b2e29692,
    & u" \" |" |; Q- u+ k
  38.   $8aad2b2f, $8e6c3698, $832f1041, $87ee0df6,4 Z- Q  S9 ?# V5 a; A* A
  39.   $99a95df3, $9d684044, $902b669d, $94ea7b2a,
    0 H, g: a. g$ v- o' M. z; m
  40.   $e0b41de7, $e4750050, $e9362689, $edf73b3e,* @* t: M+ V; j! B% [6 q
  41.   $f3b06b3b, $f771768c, $fa325055, $fef34de2,# p8 D; |8 d# h1 I- b0 q0 ]. H
  42.   $c6bcf05f, $c27dede8, $cf3ecb31, $cbffd686,
    ! w4 L. U/ s1 e% O. V" p
  43.   $d5b88683, $d1799b34, $dc3abded, $d8fba05a,/ v% |5 w& g. N- E! N3 y$ H
  44.   $690ce0ee, $6dcdfd59, $608edb80, $644fc637,6 b1 x+ e& X9 O& R% h: h/ z# i
  45.   $7a089632, $7ec98b85, $738aad5c, $774bb0eb,9 k* q/ `, G& m/ ]: m
  46.   $4f040d56, $4bc510e1, $46863638, $42472b8f,: f7 c! `% G! i! k9 K/ o: ]
  47.   $5c007b8a, $58c1663d, $558240e4, $51435d53,
    9 m! m& S7 F. ~- w, y
  48.   $251d3b9e, $21dc2629, $2c9f00f0, $285e1d47,
    0 _3 D( U  s5 z' q( X* ?
  49.   $36194d42, $32d850f5, $3f9b762c, $3b5a6b9b,( m% c2 f% y$ S) b, m
  50.   $0315d626, $07d4cb91, $0a97ed48, $0e56f0ff,: d0 v  B! y. Z+ m3 V; ^
  51.   $1011a0fa, $14d0bd4d, $19939b94, $1d528623,4 Y8 z& P% N+ _2 ^1 P
  52.   $f12f560e, $f5ee4bb9, $f8ad6d60, $fc6c70d7,
    ! O9 N. R2 p" Z3 L! M
  53.   $e22b20d2, $e6ea3d65, $eba91bbc, $ef68060b,
    1 A+ F) y" _8 n/ W( ^3 `4 g
  54.   $d727bbb6, $d3e6a601, $dea580d8, $da649d6f,6 D; V, ?8 ]" R: v
  55.   $c423cd6a, $c0e2d0dd, $cda1f604, $c960ebb3,
    # Q+ F1 k* M0 m5 b6 t
  56.   $bd3e8d7e, $b9ff90c9, $b4bcb610, $b07daba7,. w5 c5 ~3 C6 L8 T$ o- }2 T7 D# g
  57.   $ae3afba2, $aafbe615, $a7b8c0cc, $a379dd7b,
    ( w! a- ?! g. V) i7 ]4 {' y% r" r
  58.   $9b3660c6, $9ff77d71, $92b45ba8, $9675461f,
    0 [1 X0 t. L( H* _! ]; g1 c- U, g( l
  59.   $8832161a, $8cf30bad, $81b02d74, $857130c3,
    7 V' w# X/ z8 H9 d5 ~' R) [
  60.   $5d8a9099, $594b8d2e, $5408abf7, $50c9b640,
    - ?2 \4 a" D$ t: i
  61.   $4e8ee645, $4a4ffbf2, $470cdd2b, $43cdc09c,
    " F& Q, W! i  i/ ^4 s
  62.   $7b827d21, $7f436096, $7200464f, $76c15bf8,
    + y; c( O* s7 M% P4 e  J7 [
  63.   $68860bfd, $6c47164a, $61043093, $65c52d24,
    0 I$ h3 s7 T. ?" q4 t% B
  64.   $119b4be9, $155a565e, $18197087, $1cd86d30,0 L2 y6 [" v5 ^- A
  65.   $029f3d35, $065e2082, $0b1d065b, $0fdc1bec,
    / o$ O1 P& R$ z% Y- \7 O) C- H
  66.   $3793a651, $3352bbe6, $3e119d3f, $3ad08088,1 o: D0 f3 v% P+ ?& ^$ Z
  67.   $2497d08d, $2056cd3a, $2d15ebe3, $29d4f654,
    ' F2 z& l. h& A2 W# ~( U
  68.   $c5a92679, $c1683bce, $cc2b1d17, $c8ea00a0,
    1 `8 _2 n! x, f5 G
  69.   $d6ad50a5, $d26c4d12, $df2f6bcb, $dbee767c,! \. F3 S: |, n, D: b( h$ [3 F; R3 h3 B
  70.   $e3a1cbc1, $e760d676, $ea23f0af, $eee2ed18,
    0 `0 z7 z3 U4 X
  71.   $f0a5bd1d, $f464a0aa, $f9278673, $fde69bc4,
    % v: r, i9 @  N. L4 t  d
  72.   $89b8fd09, $8d79e0be, $803ac667, $84fbdbd0,! n% k0 g( B# @& \' w2 u! D& V% M; Q2 [
  73.   $9abc8bd5, $9e7d9662, $933eb0bb, $97ffad0c,5 Q" D6 A* x9 [
  74.   $afb010b1, $ab710d06, $a6322bdf, $a2f33668,8 \9 e% E8 ^5 I0 j! _, M1 s( _% E
  75.   $bcb4666d, $b8757bda, $b5365d03, $b1f740b4
    9 m$ ?. X( X$ Y8 g! v
  76. );
      n9 ?/ W  b" U2 v% ?- ?. l, a
  77. // 00 01 02 03          --> 0x03020100/ Q+ C: a" `  T" ]& O' a) n, ?! c
  78. // 00 01 02 03 04       --> 0x03020100, 0x04000000
    1 g& e) g  w* y: ^' Q! y; E
  79. // 00 01 02 03 04 05    --> 0x03020100, 0x05040000. m+ ]1 E- L2 t7 C7 ]: q
  80. // 00 01 02 03 04 05 06 --> 0x03020100, 0x06050400  c% W: r$ u- A/ P5 L( h' L
  81. //* A( n" I) p4 S' E
  82. function stm32_sw_crc32_by_byte(crc32 : DWORD;
    . m3 p/ M# @4 E+ s: `( R8 n
  83.   pBuffer : pbyte; NumOfByte : DWORD) : DWORD;" i) I$ r  O" Y8 z7 Y
  84. var
    / H; N" |, ?+ l5 O; x3 b# R7 Z
  85.   i : DWORD;
    / I3 j1 g9 K+ x: `' l
  86. last_data : array[0..3] of byte;
    # P) A' K0 F0 R; e% C- z2 v% W! M4 [
  87.   NumOfDWord : DWORD;# {( Y# r7 T0 n* a' n
  88.   NumOfTailByte : DWORD;. ^* N: J0 O* `7 \" [1 {1 D- m
  89. begin
    % O6 Y2 }2 M% F, ?: e& ?/ W# c" i
  90. NumOfDWord := NumOfByte shr 2;! J5 {/ w& i3 @
  91. NumOfTailByte :=  NumOfByte and 3 ;
    & g4 {1 r! u0 N" ]  J" ?1 u# |& z
  92.   for i := 0 to  NumOfDWord-1 do
    6 P% y& Y- h) |/ ?; A9 K
  93.   begin
    & }" ~1 q7 c3 w" o% l
  94.     crc32 := crc32 xor ( PDWORD( pbuffer ) )^;
    2 [2 g, W" r5 f8 n0 Y; M3 n
  95.     Inc( pbuffer, 4);4 X) M/ P5 d7 S
  96.     crc32 := (crc32 shl 8) xor sw_crc32_by_byte_table[crc32 shr 24];6 H7 G) M+ u9 |
  97.     crc32 := (crc32 shl 8) xor sw_crc32_by_byte_table[crc32 shr 24];
    ; I" Q# T2 d4 G/ S4 i% C8 p
  98.     crc32 := (crc32 shl 8) xor sw_crc32_by_byte_table[crc32 shr 24];: h- F6 n% A3 S) S8 Q
  99.     crc32 := (crc32 shl 8) xor sw_crc32_by_byte_table[crc32 shr 24];
    , R: `) m& V% |: K( e- ]
  100.   end;
    4 q3 a0 X* g  t
  101.   if NumOfTailByte <> 0 then0 B& G4 X5 A6 m6 u& k8 x
  102.   begin" c* z6 c1 ~& F
  103.     for i := 0 to 3 do
      w" a6 J5 B& L, d: h& F
  104.       last_data[i] := 0;
    5 d7 r, ?9 o$ E& [7 i
  105.     if NumOfTailByte = 1 then7 a: N5 i; Y4 N0 s3 q  t& r
  106.     begin
    ( m& U7 i$ U& w/ s5 b
  107.       last_data[3] := pBuffer^;
    ! t( `0 h* J" U4 P" |, p( {: h
  108.     end
    6 e/ g- q1 D. o# {1 d, D
  109.     else if NumOfTailByte = 2 then; z2 q6 v; g  q, t
  110.     begin
    9 p2 W! D/ f# K" ]. i( z
  111.       last_data[2] := pBuffer^;
    2 Z! U# x0 V7 ]! z1 A# z
  112.       Inc( pBuffer );8 _4 w' u! o( K8 H3 k
  113.       last_data[3] := pBuffer^;
    3 J& c! b$ l7 b1 t* u
  114.     end
    2 X3 f8 k4 F& ^% c0 ]1 m* R$ T
  115.     else
    1 E. P' D; ~2 n! l% T3 h0 }
  116.     begin; X9 C, d5 \$ {( G$ Y1 c7 u3 N/ _
  117.       last_data[1] := pBuffer^;
    ' A; Z' x1 w9 Q0 ?9 q5 Q3 t+ M+ T8 j" c
  118.       Inc( pBuffer );
    ; N2 w9 m3 C' Z4 m3 a
  119.       last_data[2] := pBuffer^;
    : \/ R2 l' d4 A8 r8 ^+ _2 P
  120.       Inc( pBuffer );* ~  x# M7 a  Z; P! @
  121.       last_data[3] := pBuffer^;
    % R3 {* n  G6 Q  h! l. Y$ P6 `& ], [" h
  122.     end;
    0 f% F% I; u7 g1 |9 \: c5 z
  123.     crc32 :=  stm32_sw_crc32_by_byte( crc32, @last_data, 4 );6 S* u  C8 [3 D) J- ?0 s
  124.   end;4 r9 w% p: _) y  J0 W+ M) X
  125. result := crc32;9 R4 K  i2 q7 z1 v
  126. end;8 b+ Y9 v+ C! f7 u- @' d0 X
  127. function uCrc32_Demo : DWORD;7 v5 d6 s' I7 W4 [. H
  128. var9 V; R5 j" _% D) {! G- S
  129.   crc32 : DWORD;
    , C1 }5 M  E6 N  E7 L- o$ O, x& x
  130.   buffer : array[0..3] of DWORD;
    / D% m4 _7 I% ?  H$ L# T, ?
  131. begin7 d. q8 Q8 M/ _
  132.   buffer[0] := $12345678;; z- ]0 U" Y. R; W  A1 T
  133.   buffer[1] := $00000000;
    % R" f2 J6 l/ A2 L6 M8 L
  134.   buffer[2] := $12345678;
    5 t8 Y9 I' f( n$ _
  135.   crc32 := stm32_sw_crc32_by_byte( $FFFFFFFF, @buffer, 12 );! e  [" ~/ K; c. F0 z2 e9 S
  136.   buffer[3] := crc32;
    - b/ H& C" N6 ^' E, \6 W
  137.   crc32 := stm32_sw_crc32_by_byte( $FFFFFFFF, @buffer, 16 );
    6 k4 ], D, h' q9 t) W! d8 T
  138.   result := crc32;( q1 v- e" [9 P; Q& k; l
  139. end;
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