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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. /*
    * ^2 p: O+ _; q6 p2 M5 b9 K

  2. - w" a% p$ D; }; h
  3. The CRC calculation unit mainly consists of a single 32-bit data register, which:/ G& @0 {) N  Y' N. u: t' g7 w
  4. is used as an input register to enter new data in the CRC calculator% i0 G) I+ Y" J" N! b" e* W
  5. (when writing into the register) holds the result of the previous CRC calculation; c$ k( p" _8 `$ _
  6. (when reading the register)% ~3 d3 t/ Q& ]8 }5 \; {# U
  7. 4 x+ O- p1 b* {/ [5 l! w
  8. Each write operation into the data register creates a combination of. K3 a" S( Z" s/ b
  9. the previous CRC value and the new one
    / b( Y- M1 T! m  O2 e- O
  10. (CRC computation is done on the whole 32-bit data word, and not byte per byte).
    . B7 ?" }  W$ k2 p
  11. . Z( e& q" ^1 z6 c6 _
  12. The CPU is stalled during the computation, thus allowing back-to-back write accesses or
    4 E8 j0 S: a  q, ~
  13. consecutive write and read accesses, without having to insert software wait cycles., r  ?( m6 V" c
  14. The CRC calculator can be reset to FFFF FFFFh with the RESET control bit in the CRC_CR register.0 e; A& Z# ~( W7 M# p3 p  c
  15. This operation does not affect the contents of the CRC_IDR register
    6 G  [; b8 T! n  i; U. ~+ o
  16. POLY_USED_IN_STM32     0x04C11DB7
    $ L! m1 |5 R3 B* _) c3 _4 _1 x
  17. #define CRC_INITIALVALUE     0xFFFFFFFF/ t# l9 y% T9 t. u9 _
  18. 1. RCC_AHBPeriphClockCmd(RCC_AHBPeriph_CRC, ENABLE); /* Enable CRC clock */
    . L+ z3 R# h1 E- t! o9 J8 Z. J
  19. 2.% a( y, s& R8 E7 k6 u0 P$ ?5 j* a& T
  20. // 00 01 02 03          --> 0x030201007 `& x! Z. c+ S4 P
  21. // 00 01 02 03 04       --> 0x03020100, 0x04000000
    ' ]3 G! Q- `. T2 r4 Q
  22. // 00 01 02 03 04 05    --> 0x03020100, 0x050400004 K. f* G7 q  t5 Y5 O
  23. // 00 01 02 03 04 05 06 --> 0x03020100, 0x06050400
    $ d4 P2 C: k/ v. S/ |2 _3 N, a
  24. //) |! M: w9 V6 X8 A
  25. uint32_t stm32_hw_crc32(uint32_t crc32, uint8_t pBuffer[], uint32_t NumOfByte)
    + V% m  p# U' I- X$ W, {* w5 a% @2 b
  26. {
    % q/ p" U7 A/ i% K1 w, G3 s. a
  27.   uint32_t last_data;8 J5 L( V' P! b: A
  28.   uint32_t NumOfDWord = NumOfByte>>2;
    $ U$ }2 W  O- `3 t
  29.   uint32_t NumOfTailByte =  NumOfByte & 3 ;$ `) E  j* \* G2 J4 H0 H
  30. * u; ^1 u$ L4 E
  31.   CRC_ResetDR();
    2 f; q6 B1 j/ C
  32.   crc32 = CRC_CalcBlockCRC( (uint32_t  *)pBuffer, NumOfDWord );
    4 P' z. I' f9 n# J5 D; Z9 H

  33. ' f; u2 J! L. e
  34.   switch ( NumOfTailByte )8 T# @; b# ^  v0 f6 `. [
  35.   {$ q2 @  w7 {/ V. }
  36.     case 0:
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  37.       return crc32;
    5 m& T. Q# @6 R$ l( B
  38.     case 1:
    ; l1 J$ a0 W5 \
  39.       last_data = pBuffer[NumOfByte-1] << 24;# ~- M: i. }2 Z# L% Z( K
  40.       break;$ Y2 x" i0 o) R2 O; q) L$ |8 A
  41.     case 2:
    + E/ D) ?2 m3 H. V1 D0 V
  42.       last_data = *( (uint16_t *)(&pBuffer[NumOfByte-2]) );
    4 x. f! o7 s4 t' G5 E' t5 z
  43.       last_data <<= 16;- g" p6 H9 F! m6 [+ G" v
  44.       break;
    " u+ `# M) |4 i0 g  t- o
  45.     case 3:
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  46.       last_data = *( (uint16_t *)(&pBuffer[NumOfByte-3]) );
    ( v+ _; E- O# X, l& P8 h- d3 L
  47.       last_data <<= 8;
    7 ~4 f& c& H; r7 \* ~
  48.       last_data += pBuffer[NumOfByte-1]<<24;# N! a: t% F: d9 m& {
  49.       break;7 W% \6 K( ~) C" c6 ]
  50.   }
    : x# z  _; Q( K" X
  51.   return CRC_CalcCRC( last_data );5 j/ J/ W" F* l- r; Y5 C8 C
  52. }
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  53. 7 u4 v0 N6 T. _+ A$ Z; y/ R2 g6 m

  54. 4 R$ y8 q7 y0 ?' \# K2 j6 `) p! T( y

  55. 6 d6 J/ b! ~: x4 L) }; |3 [
  56. uint32_t stm32_sw_crc32_by_bit(uint32_t crc32, uint8_t pBuffer[], uint32_t NumOfByte)
      U9 q5 U( r, F( K
  57. {4 K1 h4 j' K1 ~
  58.   uint32_t last_data;
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  59.   uint32_t NumOfDWord = NumOfByte>>2;
    $ y. R% Q3 W' O$ a$ @' u
  60.   uint32_t NumOfTailByte =  NumOfByte & 3 ;
    - c9 b, a' I# U4 m8 p
  61.   ; M1 @' |( A  z1 L, e
  62.   while(NumOfDWord--)
    0 g. E7 E2 ^5 x
  63.   {5 ]9 @* l' G7 U( Z
  64.     crc32 = crc32 ^ *((unsigned long *)pBuffer);2 V7 k/ N6 k5 }2 C" |0 M( m
  65.     pBuffer += 4;
    ( I0 |; P/ x; B# G. y8 W' P

  66. 1 p, B% h0 m& o+ |+ ?
  67.     for(int i=0; i<32; i++)
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  68.     {' j: A) x% V2 l; N3 l" E, H
  69.       if (crc32 & 0x80000000)
    , X+ q5 Y, m( F9 r1 g+ x
  70.         crc32 = (crc32 << 1) ^ POLY_USED_IN_STM32;
    0 F/ b. M* ^. m+ o$ L. \
  71.       else6 o$ X3 _# j  J- E! _0 H( x
  72.         crc32 = (crc32 << 1);
    / [  K7 b8 ~2 Z6 R
  73.     }7 L& y$ {1 Y# `2 W
  74.   }5 u7 R4 D4 H8 K0 ]0 U+ P4 O1 m. y
  75.   6 b% g- P$ s. q  I, ~' ~' z6 y
  76.   switch ( NumOfTailByte )
    2 E$ K0 J6 u+ H
  77.   {5 A: X% L) L+ K# y4 K% E
  78.     case 0:% G2 l0 K- L; ?& z8 n
  79.       return crc32;     
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  80.     case 1:
    8 m& k1 [6 g4 n3 n% M3 m
  81.       last_data = pBuffer[0] << 24;. Z; `/ t) o! x1 v* y5 e  K/ m
  82.       break;
    2 I1 j/ U) ?, U% j; g) A9 e8 j% ^" H
  83.     case 2:
    2 {  \) e4 E  h
  84.       last_data = *( (uint16_t *)(&pBuffer[0]) );
    . i% ?5 P7 s3 k4 p8 R0 z
  85.       last_data <<= 16;1 o" ]7 F( ^( w; k' j  j% l" @
  86.       
    / _( Z/ k% {7 N7 b9 }
  87.       break;8 `4 }" \: Y# {6 M
  88.     case 3:
    & C- z* n% Q( C' i/ b3 ^5 w6 ?
  89.       last_data = *( (uint16_t *)(&pBuffer[0]) );1 e/ H& ^( \" S! {: M
  90.       last_data <<= 8;( l9 N; s8 [1 c. [4 n, o
  91.       last_data += pBuffer[2]<<24;
    " Z  G5 l2 b8 _: J
  92.       break;
    $ a6 B/ }' X4 }( B# q8 }$ Z
  93.   }
    5 ~1 I+ j0 m& ?) _
  94.   crc32 = stm32_sw_crc32_by_bit( crc32, (uint8_t *)&last_data, 4);* ^+ J9 r8 a$ R+ I& D8 C: E
  95.   return crc32;( s! I6 V& Q" x$ ]+ W  A4 y# |
  96. }
    ( k! M( e6 B, K! G$ `- ^1 m4 ~
  97. 3 q3 r) b0 A) H; `, @1 `! T* @2 w$ z- I
  98. 5 o  Y4 |; |1 a6 B9 E3 d1 Z
  99. // Nibble lookup table for 0x04C11DB7 polynomial
    - x2 }3 c6 L! Q8 f$ J  s; i0 Y
  100. const unsigned long sw_crc32_by_nibble_table[16] = {" @% v& {: j; a3 ]+ `. R, i9 z
  101.   0x00000000,0x04C11DB7,0x09823B6E,0x0D4326D9,
    9 v2 [% f4 t+ z" o/ k( U3 S7 Y  F
  102.   0x130476DC,0x17C56B6B,0x1A864DB2,0x1E475005,, _3 Y# U7 }% p
  103.   0x2608EDB8,0x22C9F00F,0x2F8AD6D6,0x2B4BCB61,, E- m! ]0 l) ^6 H/ O
  104.   0x350C9B64,0x31CD86D3,0x3C8EA00A,0x384FBDBD
    ) {9 N; b/ y6 a4 r6 V% Z2 r  {! N
  105. };
    % }7 ^1 T# V4 P4 L' O4 L
  106. . Z) i6 e- n/ ~; ~7 |
  107. uint32_t stm32_sw_crc32_by_nibble(uint32_t crc32, uint8_t pBuffer[], uint32_t NumOfByte)  # \& ~/ H1 g, S  g, c; M. {) Y4 e
  108. {3 }! J' M1 \& j2 j) A
  109.   uint32_t last_data;! e& J$ @# R6 G: k
  110.   uint32_t NumOfDWord = NumOfByte>>2;
    8 m) g) L) B. ?$ W+ O8 @
  111.   uint32_t NumOfTailByte =  NumOfByte & 3 ;4 d) m, b1 ^5 S$ S& M
  112.   % d7 X% N  o0 [$ L3 s
  113.   while(NumOfDWord--)& w: A( q3 j& B$ C9 v; W: q; z$ L
  114.   {
    5 h" \5 [4 z  V9 Y$ \/ B+ B* x8 \
  115.     crc32 = crc32 ^ *((unsigned long *)pBuffer);
    / S0 o8 T$ l6 D( A
  116.     pBuffer += 4;
    # ]+ b/ U, X* o+ J. a* h0 m, B
  117.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];' d! W( ~! j/ n8 y( v& X# A- W& P
  118.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];
    6 u8 ]3 B, j9 N
  119.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];
    # B8 R$ T7 W+ `/ k$ i0 |9 @; L- C* g
  120.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];3 f+ e) E/ d, G- |6 J2 W( @) G
  121.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];
    ( w7 R# Y8 y) Z
  122.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];1 v+ _  i+ {' J/ W# G2 f4 x2 i
  123.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];; R2 n' f# l5 n6 P6 E" F% p
  124.     crc32 = (crc32 << 4) ^ sw_crc32_by_nibble_table[crc32 >> 28];3 @0 k& Y* {. ?& ~
  125.   }) |4 s& y! D' K7 z( l8 W
  126.   
    $ q/ B  J8 T. z3 l' y( I7 W0 R  s
  127.   switch ( NumOfTailByte ): u% k! W5 P, I" @0 y5 m2 L. n* H
  128.   {
    % R) ~# s( Z7 h" `6 M2 b  G6 ]
  129.     case 0:
    1 d! a2 d6 R) w2 Z) A
  130.       return crc32;     
    / j" A& ?5 ~* N
  131.     case 1:( m7 v9 Q* I" O& x
  132.       last_data = pBuffer[0] << 24;6 t: ]; I3 o4 ?6 i. Z
  133.       break;
    ; L- K' I% n* \1 H
  134.     case 2:
      k8 V* ^% |5 W0 |
  135.       last_data = *( (uint16_t *)(&pBuffer[0]) );
    / p+ Q8 K5 \' p
  136.       last_data <<= 16;  g1 }$ b" b+ e
  137.       $ h9 J% a# u$ I7 Q+ G
  138.       break;- e2 w/ U$ s# ^" o# |$ z
  139.     case 3:
    + ?# m2 |9 U: E- j# ~- T7 @1 e: P3 Q
  140.       last_data = *( (uint16_t *)(&pBuffer[0]) );" g* f( H  {8 b3 q9 D. r0 z3 U
  141.       last_data <<= 8;
    ( V/ s: ^, B3 X) ^$ W* J9 e1 g
  142.       last_data += pBuffer[2]<<24;# [, i; v' r2 L6 q
  143.       break;
      o4 S: Y4 u: E" n5 c
  144.   }( q5 D$ c. f" e/ r) N
  145.   crc32 = stm32_sw_crc32_by_nibble( crc32, (uint8_t *)&last_data, 4);
    5 h. l) }) u% o2 e9 S& K( Q
  146.   return crc32;
    # t1 C$ f- e3 V' {* |
  147. }
    7 z# g8 @, q& ]& S1 p

  148. : s9 l  B. _$ F
  149. unsigned long sw_crc32_by_byte_table[256] =
    , q0 h: @" r- `$ }, G9 N* ^
  150. {
    ' u& G$ e% ]0 `4 Z' [" S
  151.   0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, // 0..3
    , {; h, H5 C* H: Q, M* G5 X  {
  152.   0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005, // 4..7
    7 Q9 y! _; y) i
  153.   0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, // 8..B  z& S- K0 O- O; _
  154.   0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, // C..F, }( [5 C- \* g0 m" p3 A0 @! a
  155.   
    7 |% Y" k4 Q5 x# |
  156.   0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,
    ; }+ v) Y& m; n- S5 v; \
  157.   0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,; ^* Q3 d# _# V- c
  158.   0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011,
    & ?* t# Q$ z+ b6 D
  159.   0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,; ~; Y- ~& b; v
  160.   0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
      t9 `4 e* o9 r, V% `6 w' a6 E+ r
  161.   0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,1 d$ R# H* v# E. e/ M
  162.   0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81,1 b4 O7 d! a; X( D
  163.   0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,; r2 v1 a2 _3 P# K& |( y( P# I
  164.   0xd4326d90, 0xd0f37027, 0**b056fe, 0xd9714b49,3 b3 w; Q% W, ^6 M' b  h0 R
  165.   0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,) R/ \& R% _" A5 ^! j" h
  166.   0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
    ( b0 g1 p: c* p6 L% W
  167.   0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
    - W  D/ P) ^- w! g$ l$ r
  168.   0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae,
    & C7 K7 p4 P( G* d  M
  169.   0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
    9 [5 [5 s9 x' \5 B; S0 Q( `/ x; o
  170.   0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16,
    % ?. @& ]- H; g- E, b" X# C
  171.   0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,; d4 h' z3 t8 g% l
  172.   0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
    ' ?" k; u  B/ k' B
  173.   0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,2 o4 ^" B. G6 `
  174.   0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066,* E2 Q+ v7 B8 a$ p3 a# H
  175.   0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,+ ~2 k7 F% l2 y; [( l* \: L
  176.   0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e,/ l' Y! _( W, z4 h- L
  177.   0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
    ( p, U% n, ]. K  g
  178.   0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,! i- o- i$ Z5 C7 \
  179.   0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
      r* X7 t6 T* v! a: Q
  180.   0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e,: A- R3 r* K' L6 S0 U. Q
  181.   0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
    ( ?$ G! x  b' v7 ^# H
  182.   0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686,2 t+ `( \1 h+ L: ~+ G5 y
  183.   0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,4 ]9 j8 @% c) n! H9 p/ O4 h! a6 I
  184.   0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
    6 y$ R" U# K( P
  185.   0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,. p6 d# t( N: b; S2 ]* `
  186.   0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f,2 r1 {+ u/ P( z. A9 ?
  187.   0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,+ {4 u! A9 \* H4 C2 V3 b- M
  188.   0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47,
    - z2 c1 j( a+ E2 B" g
  189.   0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
    : K) }; c9 ?! J& r/ ?/ I, \3 E( A% N* L
  190.   0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,* h; M1 Q0 W, ^) X  x: ^( _1 X
  191.   0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,+ o7 r4 V* Q& t+ _( o
  192.   0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7,6 \/ M# V6 Y! ~/ f! B& ^
  193.   0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
    ( ]$ i, r. }! U7 l4 o% R
  194.   0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f,1 u8 z9 u& k0 Z9 r" n
  195.   0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,0 z+ E5 E: ]" L. e9 B0 W  {
  196.   0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,6 l8 h6 C  L# g
  197.   0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,* X2 R6 w9 a, f3 f5 `3 D
  198.   0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f,
    7 t' y7 j. Z: N
  199.   0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
    2 H8 n4 j* |% _' ~. t, ?; U9 W
  200.   0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640,
    $ i: x( |5 v( ~& Y  c
  201.   0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
    % S/ H6 V! Y$ B6 G/ {2 @6 c
  202.   0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
    / I, `& X' h2 o# @
  203.   0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
    5 }2 r$ l; L( g' @0 Y
  204.   0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30,& P6 z# j: u8 j" l
  205.   0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
    3 o# b; ?; G! i$ J
  206.   0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088,
    ; r* j% n, d* a5 W1 W- U
  207.   0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
    ' J6 e. K% s; R6 X8 w' b  w
  208.   0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,  q( O, G9 q; B+ W+ E/ k5 r+ u) n
  209.   0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,5 f4 M- `5 e& O6 r/ Y
  210.   0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18,
    1 j$ q' b3 e% `" j2 \& s) |7 ^
  211.   0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,% b8 o, Q/ j* B" X( F# O/ a6 u- T8 U
  212.   0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0,
    & Z' p0 ^, R* v- _
  213.   0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,# _" s" `, y$ r9 l2 R; P8 f
  214.   0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,1 ?9 Q' h- D6 @8 Q) [4 @" o
  215.   0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
    & U' E& F) n+ y% z' f9 D. r, k
  216. };% v( r& s0 Y) [- I, e. Z5 v8 z, {
  217. uint32_t stm32_sw_crc32_by_byte(uint32_t crc32, uint8_t pBuffer[], uint32_t NumOfByte)  + }2 a3 f& B! d( G
  218. {9 J' X7 J! T4 Q% W. |
  219.   uint32_t last_data;9 a1 B$ ~+ O; o& {: m8 R4 P
  220.   uint32_t NumOfDWord = NumOfByte>>2;4 y# p: T# |5 U9 {  L+ Q7 x
  221.   uint32_t NumOfTailByte =  NumOfByte & 3 ;) d& w4 E' @/ c( C
  222.   " G+ E6 {" c7 y7 q+ ~5 U
  223.   while(NumOfDWord--)
    ) Z& p1 g& S- Q$ Z$ J
  224.   {
    * G- e9 E9 L4 }" E8 }
  225.     crc32 = crc32 ^ *((unsigned long *)pBuffer);
    6 y- v4 t) R2 K% I5 V2 W6 U
  226.     pBuffer += 4;
    ' G. @5 O: Y7 y# Z$ C
  227.     crc32 = (crc32 << 8) ^ sw_crc32_by_byte_table[crc32 >> 24];
    ( |* A5 ?  [$ i4 `7 B3 N" B
  228.     crc32 = (crc32 << 8) ^ sw_crc32_by_byte_table[crc32 >> 24];  j- C$ Y3 d$ |0 i5 g: w: ^3 T
  229.     crc32 = (crc32 << 8) ^ sw_crc32_by_byte_table[crc32 >> 24];1 V4 U: ?7 l3 e0 ~3 Z" B  V, \& G6 f
  230.     crc32 = (crc32 << 8) ^ sw_crc32_by_byte_table[crc32 >> 24];. w" m& W- d$ z" ?1 W1 A
  231.   }
    4 O9 E; g# A5 ^, T7 Y
  232.   
    # B. F# ~1 {7 x5 n. [
  233.   switch ( NumOfTailByte )( x% Y' U! L3 V% F4 [/ X
  234.   {% S% X9 i% L4 W5 k
  235.     case 0:
    / U  y1 q! f7 w! S
  236.       return crc32;     
    * U, [. k7 E% L; d
  237.     case 1:
    , W% {  a, `+ \2 x
  238.       last_data = pBuffer[0] << 24;
    5 {  L% t0 e/ r6 T) `
  239.       break;
    ) g% L* ]! P) z2 W; ?
  240.     case 2:$ a/ l2 p4 w& o0 ^
  241.       last_data = *( (uint16_t *)(&pBuffer[0]) );' w5 }$ n- _- W1 R; _
  242.       last_data <<= 16;
    5 g1 r+ N: J0 J! b
  243.       ) ^, M2 N9 o8 U
  244.       break;
    ! t5 o' i7 n% V3 [9 i/ L
  245.     case 3:
    " v! o4 ?$ s* d' w3 X; n
  246.       last_data = *( (uint16_t *)(&pBuffer[0]) );6 V1 L: A; C! n. O
  247.       last_data <<= 8;9 s) s2 M  O  q) U
  248.       last_data += pBuffer[2]<<24;2 S6 O+ c# a, P
  249.       break;  J& j# T  y7 f0 m! v# O
  250.   }- H- ]" {. |! j
  251.   crc32 = stm32_sw_crc32_by_byte( crc32, (uint8_t *)&last_data, 4);
    8 m: a/ g. ~2 B6 i. W3 |+ r1 w
  252.   return crc32;
    ' I5 [; ]0 Z9 |- b/ ^/ O+ T
  253. }
复制代码
  1. unit uCRC32;
    * w! {' E5 N7 k4 x: g' X0 w) L! }
  2. interface
    5 l" d; ^( t. a5 m3 C" D; Y1 `$ h
  3. uses( F/ j# v8 X: N8 L7 U# e
  4.   Windows;
    1 l) K7 }) O7 A  W* |9 ~
  5.   function stm32_sw_crc32_by_byte(crc32 : DWORD;- I% A+ k' h; H6 ?5 N
  6.     pBuffer : pbyte; NumOfByte : DWORD) : DWORD;# l4 p8 t5 }+ O  e! k
  7.   function uCrc32_Demo : DWORD;
    6 V* o* q7 ?1 d& k: X! Y8 L
  8. implementation
    7 _+ e% b; `, D% g; i
  9. const
    / ]" E, ]) q# A/ R6 d- B
  10.   sw_crc32_by_byte_table : array[0..255] of DWORD =
    & X* }% G7 O# F' S) k5 a
  11.   (9 R# f! S: r; H/ a4 v  P
  12.   $00000000, $04c11db7, $09823b6e, $0d4326d9,    // 0..3- g& o& e' L- y4 R
  13.   $130476dc, $17c56b6b, $1a864db2, $1e475005,    // 4..7
    , j* j- o& \& w9 I0 |( a# i* R
  14.   $2608edb8, $22c9f00f, $2f8ad6d6, $2b4bcb61,    // 8..B
    3 Y/ R' g7 `( ^9 y9 d; |
  15.   $350c9b64, $31cd86d3, $3c8ea00a, $384fbdbd,    // C..F
    / `" K1 ]4 R: u+ k( E* D, \* ~
  16.   $4c11db70, $48d0c6c7, $4593e01e, $4152fda9,: I% z( q' \5 h7 E% a* W
  17.   $5f15adac, $5bd4b01b, $569796c2, $52568b75,; V0 d: P" p7 ]
  18.   $6a1936c8, $6ed82b7f, $639b0da6, $675a1011,* ]4 w" ^8 Q+ P3 Y5 C
  19.   $791d4014, $7ddc5da3, $709f7b7a, $745e66cd,
    2 b* G# |( W" \
  20.   $9823b6e0, $9ce2ab57, $91a18d8e, $95609039,
    1 Z4 U( Y1 w7 E1 ^6 @4 @
  21.   $8b27c03c, $8fe6dd8b, $82a5fb52, $8664e6e5,3 T; `7 N- |$ i- c' c& v9 \
  22.   $be2b5b58, $baea46ef, $b7a96036, $b3687d81,
    8 H8 h7 z; F; a# P! y
  23.   $ad2f2d84, $a9ee3033, $a4ad16ea, $a06c0b5d,- r9 [4 M0 Z. O8 Y
  24.   $d4326d90, $d0f37027, $ddb056fe, $d9714b49,
    3 a. i" p- v2 N9 v5 B, [4 _& c; {
  25.   $c7361b4c, $c3f706fb, $ceb42022, $ca753d95,
    0 F+ e, m0 K% A$ F) |
  26.   $f23a8028, $f6fb9d9f, $fbb8bb46, $ff79a6f1,1 n# G: T* r; Y9 t0 L
  27.   $e13ef6f4, $e5ffeb43, $e8bccd9a, $ec7dd02d," G2 D0 e9 k: z( h
  28.   $34867077, $30476dc0, $3d044b19, $39c556ae,
    7 o; k, c, M4 x7 N' A9 F
  29.   $278206ab, $23431b1c, $2e003dc5, $2ac12072,8 C, c7 F8 p" d! j) _& X
  30.   $128e9dcf, $164f8078, $1b0ca6a1, $1fcdbb16,7 ^! \, q  [! _" i9 W4 A1 l; A2 V
  31.   $018aeb13, $054bf6a4, $0808d07d, $0cc9cdca,5 `, m( S: F- j  `" ?
  32.   $7897ab07, $7c56b6b0, $71159069, $75d48dde,
    & q" I. S" T( X9 Y: H
  33.   $6b93dddb, $6f52c06c, $6211e6b5, $66d0fb02,$ ?8 M/ B, w& y* t: z4 ?
  34.   $5e9f46bf, $5a5e5b08, $571d7dd1, $53dc6066,, w5 K- T8 Z: d+ @) e- f
  35.   $4d9b3063, $495a2dd4, $44190b0d, $40d816ba,) }" e# [) w* D; F# y% N( a8 c
  36.   $aca5c697, $a864db20, $a527fdf9, $a1e6e04e,
    : J9 ^% _/ E" ?# I& C$ A/ P
  37.   $bfa1b04b, $bb60adfc, $b6238b25, $b2e29692,
      a& l: X6 y% U# `9 L# O
  38.   $8aad2b2f, $8e6c3698, $832f1041, $87ee0df6,4 \) V; @" p3 P' ^6 S+ F! R
  39.   $99a95df3, $9d684044, $902b669d, $94ea7b2a,6 g. N% Q1 n) I/ y- R
  40.   $e0b41de7, $e4750050, $e9362689, $edf73b3e,
    3 F* k( c* l% O. \- @% W
  41.   $f3b06b3b, $f771768c, $fa325055, $fef34de2,! z* \/ \$ f$ |  p* ~
  42.   $c6bcf05f, $c27dede8, $cf3ecb31, $cbffd686,' S/ M. ]& O% U! [0 p
  43.   $d5b88683, $d1799b34, $dc3abded, $d8fba05a,% T, e# F# n# d* L, `1 M* z
  44.   $690ce0ee, $6dcdfd59, $608edb80, $644fc637,
    ; e4 {4 ~8 z: R+ Y6 O
  45.   $7a089632, $7ec98b85, $738aad5c, $774bb0eb,4 H3 ?4 b* A- D" M( A6 i* `8 N
  46.   $4f040d56, $4bc510e1, $46863638, $42472b8f,2 }: C6 E  T3 {) Q4 F+ k( S* E
  47.   $5c007b8a, $58c1663d, $558240e4, $51435d53,. ^% H" k+ u9 f; g" @. }
  48.   $251d3b9e, $21dc2629, $2c9f00f0, $285e1d47,
    : f& e. f( v7 z0 \( n+ s
  49.   $36194d42, $32d850f5, $3f9b762c, $3b5a6b9b,
    3 x% }4 v" g- S8 s
  50.   $0315d626, $07d4cb91, $0a97ed48, $0e56f0ff,( I; j8 i$ p" v. Y
  51.   $1011a0fa, $14d0bd4d, $19939b94, $1d528623,
    & q7 k: S+ e, b
  52.   $f12f560e, $f5ee4bb9, $f8ad6d60, $fc6c70d7,( g2 M! T8 c. _' F
  53.   $e22b20d2, $e6ea3d65, $eba91bbc, $ef68060b,$ J' T7 X$ C' y- f" A3 ?  M2 m, [
  54.   $d727bbb6, $d3e6a601, $dea580d8, $da649d6f,
    , B6 _9 P  S$ d# R! g, I, {) `; |) H
  55.   $c423cd6a, $c0e2d0dd, $cda1f604, $c960ebb3,! o5 ]  X# _0 ^
  56.   $bd3e8d7e, $b9ff90c9, $b4bcb610, $b07daba7,8 |: M5 ~/ I0 I7 I+ g) N. V4 h
  57.   $ae3afba2, $aafbe615, $a7b8c0cc, $a379dd7b,* P7 R9 Y, a# ]7 J3 G. b" V: m
  58.   $9b3660c6, $9ff77d71, $92b45ba8, $9675461f,6 g0 U. |( L/ K$ j. n
  59.   $8832161a, $8cf30bad, $81b02d74, $857130c3,
    % H6 \9 c) P  }3 }* W/ j# O/ W
  60.   $5d8a9099, $594b8d2e, $5408abf7, $50c9b640,
    - E9 K: d% J0 W8 y
  61.   $4e8ee645, $4a4ffbf2, $470cdd2b, $43cdc09c,$ \. h3 k7 m6 d, X' J$ r
  62.   $7b827d21, $7f436096, $7200464f, $76c15bf8,. ^" b+ u$ z' Z4 }- Y9 r, C
  63.   $68860bfd, $6c47164a, $61043093, $65c52d24," K# e4 X$ ?9 W
  64.   $119b4be9, $155a565e, $18197087, $1cd86d30,
    * d6 X; K- a* Z0 u. V
  65.   $029f3d35, $065e2082, $0b1d065b, $0fdc1bec,( w( v) ~/ C1 p$ U2 a
  66.   $3793a651, $3352bbe6, $3e119d3f, $3ad08088,9 k: @; J' B& r# p6 e! C
  67.   $2497d08d, $2056cd3a, $2d15ebe3, $29d4f654,
    1 y& a4 z2 N* p
  68.   $c5a92679, $c1683bce, $cc2b1d17, $c8ea00a0,, j+ E* G1 m, ]9 A- J
  69.   $d6ad50a5, $d26c4d12, $df2f6bcb, $dbee767c,8 V& q: g* ~( B. q- ~, y
  70.   $e3a1cbc1, $e760d676, $ea23f0af, $eee2ed18,
    $ B' G: W4 D1 Q6 r1 _7 N1 m# c
  71.   $f0a5bd1d, $f464a0aa, $f9278673, $fde69bc4,! Q2 ~: d8 D( U3 z# N. |) L/ p
  72.   $89b8fd09, $8d79e0be, $803ac667, $84fbdbd0,8 a% b2 q- ^. H5 h5 S
  73.   $9abc8bd5, $9e7d9662, $933eb0bb, $97ffad0c,
    - L  m; J- |( ]8 P& Y
  74.   $afb010b1, $ab710d06, $a6322bdf, $a2f33668,
    # K. `& ?" [9 u" U4 X3 l: i+ n2 m
  75.   $bcb4666d, $b8757bda, $b5365d03, $b1f740b4' d' ]2 Q  y) m* n% H' y4 \1 h- ^
  76. );7 h6 z  G4 X2 f) `3 C% N
  77. // 00 01 02 03          --> 0x03020100
      P, b% n* Y9 h7 C3 Q
  78. // 00 01 02 03 04       --> 0x03020100, 0x04000000  `* M) M' i4 f3 I# E8 O
  79. // 00 01 02 03 04 05    --> 0x03020100, 0x050400007 F# p: |& l/ @/ a
  80. // 00 01 02 03 04 05 06 --> 0x03020100, 0x06050400" ~, a0 }. i2 H6 d( v+ a
  81. //
    * O6 }" `2 O% u8 n: U& I8 e
  82. function stm32_sw_crc32_by_byte(crc32 : DWORD;
    8 y# h4 r/ }5 F& z* U
  83.   pBuffer : pbyte; NumOfByte : DWORD) : DWORD;
    - B4 w9 L6 r' G" \% q
  84. var
    # ~3 e8 K" C$ i: L& b1 K1 C- Q
  85.   i : DWORD;
    8 n, e/ A, [5 D
  86. last_data : array[0..3] of byte;* C, g" Q5 s& \, |  b3 _
  87.   NumOfDWord : DWORD;
    7 n+ ~0 C4 u; v$ a# ?* \  }
  88.   NumOfTailByte : DWORD;* Y! e: u8 S9 {7 ^- x) B( c
  89. begin( T( ?9 ^* ]* a4 B
  90. NumOfDWord := NumOfByte shr 2;3 i( {8 q) S( R
  91. NumOfTailByte :=  NumOfByte and 3 ;
    0 R* Q& c  r5 i8 g* v
  92.   for i := 0 to  NumOfDWord-1 do
    # C7 k" N1 ~3 k6 `7 r* o8 o& Y
  93.   begin& e) B0 |( G2 o9 k: r
  94.     crc32 := crc32 xor ( PDWORD( pbuffer ) )^;
      n' K$ Q: V$ E! q% p8 j% u- T
  95.     Inc( pbuffer, 4);. j* {8 j6 o+ |0 p: F1 Z1 y( ^
  96.     crc32 := (crc32 shl 8) xor sw_crc32_by_byte_table[crc32 shr 24];* I, F1 O( c! I& s% r
  97.     crc32 := (crc32 shl 8) xor sw_crc32_by_byte_table[crc32 shr 24];
    + S. K2 s* n  l
  98.     crc32 := (crc32 shl 8) xor sw_crc32_by_byte_table[crc32 shr 24];1 c; T9 `; i% ?( ]; p
  99.     crc32 := (crc32 shl 8) xor sw_crc32_by_byte_table[crc32 shr 24];
    , R) v- V8 L% J4 L
  100.   end;
    0 U5 ~0 m# \6 P" p: w- S
  101.   if NumOfTailByte <> 0 then
    ) F6 g. e% m0 M
  102.   begin
    9 |! V) i1 J( M0 \; e3 X% [
  103.     for i := 0 to 3 do
    , T( _8 u# h& t, D% I
  104.       last_data[i] := 0;
    / H1 s  ~( W! i' O/ D1 W8 {
  105.     if NumOfTailByte = 1 then9 L" M; Y# v) D, c
  106.     begin
    - \6 i7 [3 l- z: r, l7 p
  107.       last_data[3] := pBuffer^;
    ; ?+ y3 P# r7 R+ O' |$ K
  108.     end
    ; K2 v5 O5 J% P0 n# x5 I5 e
  109.     else if NumOfTailByte = 2 then
    / Z- n, ]# ~% j
  110.     begin
    & X7 x& k; _+ n) o. ]
  111.       last_data[2] := pBuffer^;7 u9 q* ~0 n) D
  112.       Inc( pBuffer );/ k1 s" B) D. |! f5 g
  113.       last_data[3] := pBuffer^;7 X8 L0 g& g: a, k0 m# b
  114.     end" U$ A! p  k' E/ ^3 ?( q6 R
  115.     else
    5 B" q! l* q$ p* p+ e
  116.     begin, W5 Q1 N" p4 Y8 r) {. o
  117.       last_data[1] := pBuffer^;
    ! r2 N5 @$ D- S3 F, g* `' p
  118.       Inc( pBuffer );% S& N+ n5 }. H6 p- ^6 X
  119.       last_data[2] := pBuffer^;( C& q2 Z" _: u" I7 N1 t; C
  120.       Inc( pBuffer );- I8 j$ O* R# f# X
  121.       last_data[3] := pBuffer^;7 j$ L! D5 Q8 H' W3 m) J
  122.     end;# F3 c& N0 J2 z; `
  123.     crc32 :=  stm32_sw_crc32_by_byte( crc32, @last_data, 4 );
    1 `3 R# M, Y8 G6 Y, o
  124.   end;
    3 R3 o4 g! |2 R+ z. r3 I% c. V3 O
  125. result := crc32;
    / r6 Z, H+ D% X0 ^; D! a
  126. end;
    6 o- H* b7 I+ V, o: x# ]
  127. function uCrc32_Demo : DWORD;, w/ D& V$ ^6 N! z0 }
  128. var
    # ~5 c- t* P7 N$ \0 Z
  129.   crc32 : DWORD;2 ?# B; F( r/ k# f1 }
  130.   buffer : array[0..3] of DWORD;: ~  }, }0 Y, t" _
  131. begin
    6 ~6 s. n; Q/ X/ m4 b3 }
  132.   buffer[0] := $12345678;
    7 N* F/ g6 z$ o  o& X0 Y6 [9 D# s) j
  133.   buffer[1] := $00000000;+ S6 x# ]; D( c
  134.   buffer[2] := $12345678;% d% t) I8 ], H, i( [
  135.   crc32 := stm32_sw_crc32_by_byte( $FFFFFFFF, @buffer, 12 );; {5 e/ ]* O( n/ q; y  R
  136.   buffer[3] := crc32;- f0 K9 m5 S+ `+ F% j/ U3 [
  137.   crc32 := stm32_sw_crc32_by_byte( $FFFFFFFF, @buffer, 16 );
    . ?. m, g4 s3 z
  138.   result := crc32;
    8 _. w: `1 U5 U+ j6 \
  139. end;
复制代码

9 y/ i( p; N2 f6 V1 U" c/ p) |$ l& Z4 ^' A
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